P R O D U C T
`
`
`
`I N
`
`F O R M A T
`
`I O N
`
`Information About Dow Corning® Brand
`Conformal Coatings
`
`Silicones and Electronics
`Long-term, reliable protection of sensitive circuits and
`components has become increasingly more important in
`many delicate and demanding electronic applications.
`Silicones function over a wide temperature and humidity
`range as durable dielectric insulation, as barriers against
`environmental con taminants, and as stress-relieving shock
`and vibration absorbers. In addition to sustaining their
`physical and electrical properties over a broad range of
`operating conditions, silicones are resistant to ozone and
`ultraviolet degradation and have good chemical stability. Most
`Dow Corning silicones contain significantly less solvent than
`organic coatings and are available in a wide variety of cure
`systems.
`
`Conformal Coatings
`Conformal coatings are materials applied in thin layers
`(typically a few mils or microns) onto printed circuits or
`other electronic substrates. They provide environmental and
`mechanical protection to significantly extend the life of the
`components and circuitry. Conformal coatings are tradition-
`ally applied by dipping, spraying, or simple flow coating,
`and increasingly by select coating, or robotic dispensing.
`
`Conformal coatings protect electronic printed circuit boards
`from moisture and contaminants, preventing short circuits
`and corrosion of conductors and solder joints. They also
`minimize dendritic growth and the electromigration of metal
`between conductors. In addition, the use of conformal coat-
`ings protects circuits and components from abrasion and
`solvents. Stress relief is also provided, as is protection of
`the insulation resistance of the circuit board.
`
`Dow Corning coatings are particularly useful for protecting
`circuitry in severe-service environments, while maintaining
`a low-stress environment for components and connections.
`These severe environments range from everyday tempera-
`ture and humidity extremes seen in consumer electronics to
`the more harsh automotive under-hood environment, up to
`the extreme conditions demanded in military or industrial
`applications. Recently Dow Corning coatings have also
`
`been used in a variety of consumer appliances and devices
`to protect against unpredicted conditions imposed by the end
`user. The coatings are supplied in a variety of forms that can
`be cured at room temperature or accelerated by heat, adapt-
`able to your processing needs. Most conformal coatings
`contain a UV indicator enabling blacklight visualization of
`the coating.
`
`Dow Corning® Conformal Coatings are supplied in three
`product families:
`
`• Solventless RTV elastomeric conformal coatings
`require atmospheric moisture to cure. This family of
`coatings is rapidly gaining popularity because it is more
`environmentally friendly than solvent-based materials.
`Further, its rapid cure rates can be dramatically acceler-
`ated by mild heat, plus it is reworkable and cost effective.
`These elastomers, when cured, offer the optimum stress
`relief for components and interconnections in a variety
`of service environments. Coatings manufactured for con-
`trolled volatility are offered for applications where low
`outgassing at package level or in confined environments
`is necessary.
`
`• Solventless heat cure conformal coatings are designed
`for rapid processing at moderate temps (above 100°C).
`They require some heating to cure, offering long bath life
`at room temperature. Like the room-temperature-curing
`elastomers, these products offer optimum stress relief for
`components and interconnections in a variety of service
`environments.
`
`• RTV elastoplastic conformal coatings have firm, dry
`surfaces for better handling and abrasion resistance after
`cure. They require atmospheric moisture to cure and their
`cure rates can be accelerated by mild heat. They are sup-
`plied in solvent, with low-VOC versions available.
`
`Fast Formulation
`Dow Corning manufactures a wide variety of coatings to
`meet the needs of most application and process situations,
`and we are continuously expanding the product offerings in
`each of these families to ensure that there are specific prod-
`ucts to meet your needs. However, if you can’t find an exact
`match for your needs, Dow Corning can modify any of our
`existing products to help meet your exact needs through our
`Fast Formulation process. Examples of Fast Formulation
`options include modification of a product’s cure schedule,
`
`1 of 10
`
`FITBIT EXHIBIT 1027
`
`

`
`modulus, viscosity, or color, or adding an inert intermediate
`such as UV indicator – all in a timely manner.
`
`Total Support
`Product Finder – Dow Corning features a unique interac-
`tive product finder on our website that can help you select
`the right materials for your applications. You can access the
`product finder at www.dowcorning.com/electronics by selecting
`“Technical Data” on any of our product family pages.
`
`Production of Prototype Coated Boards or Process Design
`– We can produce coated boards or test patterns for early
`evaluation of a coating’s protective abilities. Coatings will
`be applied simulating your own process of spraying, dip ping,
`or flow coating. Based on our extensive industry experience,
`we can advise you on the best methods and conditions for
`your process.
`
`Analytical, Environmental, and Physical Testing – We
`have expertise to share on a wide range of testing to monitor
`quality, on specialized testing for troubleshooting, or to
`simulate accelerated service conditions.
`
`Equipment Recommendations – Through many years of
`providing materials for electronics protection, Dow Corning
`has developed strong alliances with key equipment suppliers
`worldwide. We have just launched the External Equipment
`Provider Alliance with nine leading companies, including
`PVA and Asymtek for conformal coatings. Save time and
`expense by taking advantage of these alliances to ensure the
`optimum integration of material and processing.
`
`Consultation with Technical Experts – Have our experts
`visit your facility or join us at one of our global application
`centers to work together on your material and processing
`needs. We can provide seminars and training for your
`personnel to allow them to work more knowledgeably. With
`material, process, and equipment integration solutions from
`Dow Corning, you can manufacture more modules and
`assemblies in less time, at less cost, with fewer shutdowns
`and fewer customer rejects.
`
`Tutorials – Conformal coating tutorials, including an over-
`view and a processing tutorial, can be found on our website.
`The tutorials are accessible from the product family pages
`or the left-hand navigation bar under Technical Library.
`
`Solventless RTV Elastomeric Conformal Coatings
`
`Type
`Solventless, one-part, non-corrosive, RTV moisture-curing,
`silicone elastomers; most are fast cure
`Physical Form
`Translucent liquids; available in different viscosities
`Special Properties
`Can be accelerated with mild heat to provide very fast cure
`times; transparent to translucent; resist humidity and other
`harsh environments; good dielectric properties; available in
`controlled volatility for very sensitive applications such as re-
`lays, certain electric motors, potentiometers, and optical devices
`Primary Uses
`Low-stress protective coatings for rigid and flexible PCBs;
`frequently used as a more environmentally friendly alternative
`to organic coatings
`
`Solventless Heat Cure Conformal Coatings
`
`Type
`One-part solventless silicone elastomers
`Physical Form
`Translucent liquids; available in different viscosities; heat cure to
`low-stress elastomeric films
`Special Properties
`Fast thermal cure; transparent; resist humidity and other harsh
`environments; good dielectric properties; self-priming adhesion
`Primary Uses
`Protective coatings for rigid and flexible printed circuit boards;
`resist humidity and other harsh environments; frequently used as
`a more environmentally friendly alternative to organic coatings
`
`RTV Elastoplastic Conformal Coatings
`
`Type
`One-part RTV silicone resins
`Physical Form
`Translucent liquids; available in traditional or OS solvent
`dilutions; cure to clear elastoplastic resin films
`Special Properties
`Can be accelerated with mild heat to provide faster cure times;
`abrasion resistant; resist humidity and other harsh environ-
`ments; good dielectric properties
`Primary Uses
`Abrasion-resistant protective coatings for rigid and flexible
`PWBs, plus a variety of ceramic and hybrid circuits, compo-
`nents, connectors, and connections
`
`2
`
`2 of 10
`
`

`
`Product/Application Information
`POT LIFE AND CURE RATE
`The pot life of Dow Corning RTV Conformal Coatings is
`dependent on the application method chosen. To extend pot
`life, minimize exposure to moisture by using dry air or dry
`nitrogen blanketing whenever possible.
`
`The pot life of Dow Corning Heat Cure Conformal Coatings
`is also dependent on the conditions in which they are
`processed, but is typically greater than 2 months. Dip tanks
`or containers should be closed and sealed when not in use.
`To maximize pot life, tank temperatures should be main-
`tained at less than 29°C (85°F).
`
`REPAIRABILITY
`In the manufacture of electronic devices, it is often desirable
`to salvage or reclaim damaged or defective units. Dow Corning
`Conformal Coatings offer excellent repairability because
`they can be removed from substrates and circuitry by scraping
`or cutting, or by using solvents or stripping agents. If only
`one circuit component is to be replaced, a soldering iron may
`be applied directly through the coating to remove the
`component.
`
`After the circuit board has been repaired, the area should be
`cleaned by brushing or by using solvent, then dried and
`recoated with the original coating, as the coatings have very
`good adhesion to themselves. Heat cure coatings can be
`repaired with RTV coatings, but heat cure coatings may not
`work well when used to repair RTV coatings.
`
`COMPATIBILITY
`Certain materials, chemicals, curing agents, and plasticizers
`can inhibit the cure of Dow Corning® Q1-4010 Conformal
`Coating and Dow Corning® 1-4105 Conformal Coating.
`Most notable of these include:
`• Organotin and other organometallic compounds
`• Silicone rubber containing organotin catalyst
`• Sulfur, polysulfides, polysulfones, or other sulfur-
`containing material
`• Amines, urethanes, or amine-containing materials
`• Phosphorus or phosphorus-containing materials
`• Unsaturated hydrocarbon plasticizers
`• Some solder flux residues
`
`If a substrate or material is questionable with respect to
`potentially causing inhibition of cure, it is recommended
`that a small scale compatibility test be run to ascertain suit-
`ability in a given application. The presence of liquid or
`uncured product at the interface between the questionable
`substrate and the cured conformal coating indicates incom-
`patibility and inhibition of cure.
`
`Dow Corning Conformal Coatings have shown good
`compatibility with no- or low-lead solder residue.
`
`ADHESION
`Dow Corning Conformal Coatings are formulated to provide
`adhesion to most common electronic substrates and materials
`including adhesion to most low-solids (no clean) and no-lead
`solder flux residues. With heat-cure coatings, the adhesion is
`complete with the full cure time and temperature. With RTV
`cure coatings, adhesion typically lags behind cure and may
`take 72 hours to build in some coatings. On certain difficult,
`low-surface-energy surfaces, adhesion may be improved by
`priming or by special surface treatment such as chemical or
`plasma etching.
`
`USEFUL TEMPERATURE RANGES
`For most uses, silicone elastomers (including Dow Corning®
`3-1753 Conformal Coating, Dow Corning® 3-1765 Con for mal
`Coating, Dow Corning® 3-1744 Conformal Coating,
`Dow Corning® 3-1953 Conformal Coating, Dow Corning®
`3-1965 Conformal Coating, Dow Corning® 3-1944 Conformal
`Coating, Dow Corning® 3140 RTV Coating, Dow Corning®
`Q1-4010 Conformal Coating, Dow Corning® 1-4105 Con-
`formal Coating) should be operational over a temperature
`range of -45 to 200°C (-49 to 392°F) for long periods.
`However, at both the low- and high-temperature ends of
`the spectrum, behavior of the materials and performance in
`particular applications can become more complex and
`require additional considerations.
`
`For low-temperature performance, thermal cycling to condi-
`tions such as -55°C (-67°F) may be possible, but performance
`should be verified for your parts or assemblies. Factors that
`may influence performance are configuration and stress
`sensitivity of components, cooling rates and hold times, and
`prior temperature history. RTV elastoplastic coatings main-
`tain performance at -65°C (-85°F) and below.
`
`At the high-temperature end, the durability of the cured
`silicone elastomer is time and temperature dependent. As
`expected, the higher the temperature, the shorter the time
`the material will remain useable.
`
`STORAGE AND SHELF LIFE
`Storage conditions and shelf life (“Use by” date) are
`indicated on the product label.
`
`Special precautions must be taken to prevent moisture from
`contacting Dow Corning RTV Conformal Coatings.
`Containers should be kept tightly closed and head or air
`space minimized. Partially filled containers should be
`purged with dry air or other gases, such as nitrogen.
`
`LIMITATIONS
`These products are neither tested nor represented as suitable
`for medical or pharmaceutical uses.
`
`continues on page 10
`
`3
`
`3 of 10
`
`

`
`PRODUCT INFORMATION
`Product
`Description
`Solventless RTV Elastomeric Conformal Coatings
`Dow Corning® 3-1753
`1-part, transparent, medium-viscosity conformal coating; UL,
`IPC, and Mil Spec approved/recognized
`Conformal Coating1
`
`Dow Corning® 3-1765
`Conformal Coating1
`
`1-part, transparent, low-viscosity conformal coating; UL, IPC,
`and Mil Spec approved/recognized
`
`Features
`
`Medium viscosity; room-temperature cure with optional heat acceleration; cures
`to soft, low-stress elastomer; UL 94V-1 recognized and Mil Spec approved; IPC-
`CC-830; UV indicator for inspection; no added solvents
`Low viscosity; room-temperature cure with optional heat acceleration; cures to
`soft, low-stress elastomer; UL 94V-1 recognized and Mil Spec approved; IPC-
`CC-830; UV indicator for inspection; no added solvents
`
`Dow Corning® 3-1744
`Conformal Coating1
`
`1-part, translucent, flowable conformal coating; UL, IPC, and
`Mil Spec approved/recognized
`
`Flowable; room-temperature cure with optional heat acceleration; cures to soft,
`low-stress elastomer; UL 94V-0 recognized and Mil Spec approved; IPC-CC-830;
`UV indicator for inspection; no added solvents
`
`Dow Corning® 3-1953
`Conformal Coating
`
`1-part, transparent, medium-viscosity conformal coating; UL,
`IPC, and Mil Spec approved/recognized
`
`Dow Corning® 3-1965
`Conformal Coating
`
`1-part, transparent, low-viscosity conformal coating; UL, IPC,
`and Mil Spec approved/recognized
`
`Medium viscosity; room-temperature cure with optional heat acceleration; cures
`to soft, low-stress elastomer; UL 94V-0 recognized and Mil Spec approved; IPC-
`CC-830; UV indicator for inspection; no added solvents
`Low viscosity; room-temperature cure with optional heat acceleration; cures to
`soft, low-stress elastomer; UL 94V-0 recognized and Mil Spec approved; IPC-
`CC-830; UV indicator for inspection; no added solvents
`
`Dow Corning® 3-1944
`Conformal Coating
`
`1-part, translucent conformal coating or adhesive with added
`UV indicator; good flowability; fast tack-free time; good flame
`resistance; MIL-A-46058 approved/recognized
`
`Flowable; room-temperature cure with optional heat acceleration; cures to soft,
`low-stress elastomer; UL 94V-0 recognized and Mil Spec approved; IPC-CC-830;
`UV indicator for inspection; no added solvents
`
`Dow Corning® 3140
`RTV Coating
`
`1-part, translucent coating; good flowability; good flame
`resistance; UL, IPC, and Mil Spec approved/recognized
`
`Good flowability; room-temperature cure; no added solvents; UV indicator for
`inspection; UL 94V-1 recognized, IPC-CC-830, and MIL-A-46146
`
`Dow Corning®
`HC 1000
`
`1-part, gray, fast tack-free conformal coating with controlled
`volatility; high viscosity and good flame resistance
`
`Dow Corning®
`HC 1100
`
`1-part, gray, fast tack-free conformal coating with controlled
`volatility; medium viscosity
`
`Dow Corning®
`HC 2000
`Dow Corning®
`HC 2100
`Dow Corning®
`SE 9157
`
`1-part, translucent; fast tack-free flowable conformal coating
`with controlled volatility
`1-part, translucent, fast tack-free high-viscosity conformal
`coating with controlled volatility
`1-part, translucent, fast tack-free medium-viscosity conformal
`coating
`
`Dow Corning®
`SE 9186 L
`
`1-part, translucent or black, fast tack-free flowable conformal
`coating with controlled volatility
`
`Dow Corning®
`SE 9187 L
`
`Dow Corning®
`SE 9189 L RTV
`
`1-part, translucent or black, fast tack-free low-viscosity
`conformal coating with controlled volatility and good flame
`resistance
`1-part, white or gray, fast tack-free flowable-viscosity conformal
`coating with controlled volatility and good flame resistance
`
`Fast tack-free room-temperature cure; high viscosity; cures to soft, low-stress
`elastomer; pigmented to hinder component identification; UL 94 V-0 flammability
`rating; controlled silicone volatility; no added solvents
`Fast tack-free room-temperature cure; medium viscosity; cures to soft, low-stress
`elastomer; pigmented to hinder component identification; controlled silicone
`volatility; no added solvents
`Fast tack-free room-temperature cure; flowable; cures to soft, low-stress elastomer;
`controlled silicone volatility; no added solvents
`Fast tack-free room-temperature cure; high viscosity; cures to soft, low-stress
`elastomer; controlled silicone volatility
`Fast tack-free room-temperature cure; medium viscosity; cures to soft, low-stress
`elastomer; no added solvents
`
`Fast tack-free room-temperature cure; flowable; cures to soft, low-stress elastomer;
`black version is pigmented to hinder component identification; controlled silicone
`volatility; no added solvents
`Fast tack-free room-temperature cure; low viscosity; cures to soft, low-stress
`elastomer; black version is pigmented to hinder component identification; UL 94
`HB flammability rating; controlled silicone volatility; no added solvents
`Fast tack-free room-temperature cure; flowable; cures to soft, low-stress elastomer;
`pigmented to hinder component identification; UL 94 V-0 flammability rating;
`controlled silicone volatility; no added solvents
`
`1Not available in Europe.
`
`4
`
`4 of 10
`
`

`
`Potential Uses
`Product
`Solventless RTV Elastomeric Conformal Coatings
`Dow Corning® 3-1753
`Protective coating for rigid and flexible circuit
`boards. These fast-curing, one-part, self-priming
`Conformal Coating1
`coatings cure to flexible, transparent elastomers
`ideally suited for electronic printed wiring board
`(PWB) applications, particularly those employing
`sensitive components and fine pitch designs.
`
`Dow Corning® 3-1765
`Conformal Coating1
`
`Designed to provide excellent pin/solder joint
`coverage and thin-section encapsulation. This fast-
`curing, one-part, self-priming coating cures to a
`flexible, translucent elastomer.
`Protective coating for rigid and flexible circuit
`boards. These fast curing, one-part, self- priming
`coatings cure to flexible, transparent elastomers
`ideally suited for electronic printed wiring board
`(PWB) applications, particularly those employing
`sensitive components and fine pitch designs.
`
`Designed to provide excellent pin/solder joint
`coverage and thin section encapsulation. This fast-
`curing, one-part, self-priming coating cures to a
`flexible, translucent elastomer.
`Supplied at a higher viscosity, this material cures to
`a tough, durable elastomer for improved pin/solder
`joint coverage and thin-section encapsulation.
`Protective coating for rigid and flexible circuit
`boards, connectors, electronic components, or
`sensors; fast tack-free cure, highly controlled
`volatility for use around relays, brush motors, and
`high-tolerance devices (HDD, DVD, CD).
`
`Protective coating for rigid and flexible circuit
`boards, connectors, electronic components, or
`sensors; fast tack-free cure.
`Protective coating for rigid and flexible circuit
`boards, connectors, electronic components, or
`sensors; fast tack-free cure, highly controlled
`volatility for use around relays and high-tolerance
`devices (HDD, DVD, CD).
`
`Dow Corning® 3-1744
`Conformal Coating1
`
`Dow Corning® 3-1953
`Conformal Coating
`
`Dow Corning® 3-1965
`Conformal Coating
`
`Dow Corning® 3-1944
`Conformal Coating
`
`Dow Corning® 3140
`RTV Coating
`
`Dow Corning®
`HC 1000
`
`Dow Corning®
`HC 1100
`
`Dow Corning®
`HC 2000
`Dow Corning®
`HC 2100
`Dow Corning®
`SE 9157
`
`Dow Corning®
`SE 9186 L
`
`Dow Corning®
`SE 9187 L
`
`Dow Corning®
`SE 9189 L RTV
`
`Application Methods
`
`Cure
`
`Applied by spray, brush, flow or some
`automated pattern coating. May be dip
`coated with special precautions.
`Applied by spray, brush, flow or automated
`pattern coating requiring lower viscosity
`material. May be dip coated with special
`precautions.
`Applied by brush or flow coating or syringe
`dispensed for spot protection of pins or
`other devices.
`
`Time to cure is dependent on several variables
`including the method of application, film
`thickness, temperature and humidity. Tack-
`free time in the data table gives an indication
`of typical times until surface is dry enough to
`handle. Cure time for full cure are indications of
`time needed to develop full physical properties
`such as durometer, tensile strength or adhesion.
`These times, including full cure time, can be
`significantly improved by introducing mild heat
`of 60°C or less.
`
`Applied by spray, brush, flow or some
`automated pattern coating. May be dip
`coated with special precautions.
`Applied by spray, brush, flow or automated
`pattern coating requiring lower viscosity
`material. May be dip coated with special
`precautions.
`Applied by brush or flow coating or syringe
`dispensed for spot protection of pins or
`other devices.
`
`Applied by syringe dispense, brush or flow
`coating.
`
`Applied by spray, brush, flow or some
`automated pattern coating. May be dip
`coated with special precautions.
`
`Applied by syringe dispense, brush or flow
`coating.
`
`Applied by spray, brush, flow or some
`automated pattern coating. May be dip
`coated with special precaustions.
`Applied by syringe dispense, brush or flow
`coating.
`
`5
`
`5 of 10
`
`

`
`Features
`
`Low viscosity, fast low-temperature heat cure with very long bath life; cures to
`low-stress elastomer
`
`Medium viscosity; fast, low-temperature heat cure; cures to soft, low-stress
`elastomer; no added solvents; UV indicator for inspection; UL V-1 flammability
`rating; Mil Spec 46058C tested
`Low viscosity; fast, low-temperature heat cure; cures to soft, low-stress elastomer;
`no added solvents; UV indicator for inspection; UL V-1 flammability rating
`
`Low viscosity; fast, low-temperature heat cure; cures to soft, low-stress elastomer;
`no added solvents; UV indicator for inspection; mixing on-site extends shelf life
`
`Cures to tough, resilient, abrasion-resistant surface; solvent-borne resin coating;
`room-temperature cure with optional heat acceleration after solvent flash-off; UV
`indicator for inspection; UL V-0 flammability rating; Mil Spec 46058C and IPC-
`CC-830B tested
`Cures to tough, resilient, abrasion-resistant surface; solvent-borne resin coating
`with much lower odor; reduced VOC content as measured by certain U.S. state
`standards; more environmentally and worker friendly; room-temperature cure with
`optional heat acceleration after solvent flash-off; UV indicator for inspection; UL
`V-0 flammability rating; IPC-CC-830 tested; Mil Spec 46058C tested
`Cures to tough, resilient, abrasion-resistant surface; solvent-borne resin coating;
`room-temperature cure with optional heat acceleration after solvent flash-off; UV
`indicator for inspection; UL V-0 flammability rating; Mil Spec 46058C tested
`Cures to tough, resilient, abrasion-resistant surface; solvent-borne resin coating
`with much lower odor; reduced VOC content as measured by certain U.S. state
`standards; more environmentally and worker friendly; room-temperature cure with
`optional heat acceleration after solvent flash-off; UV indicator for inspection; UL
`V-0 flammability rating; IPC-CC-830 tested; Mil Spec 46058C tested
`
`PRODUCT INFORMATION (Continued)
`Description
`Product
`Solventless Heat Cure Conformal Coatings
`Dow Corning®
`1 part, transparent, low-viscosity conformal coating
`CC-4555 Long Bath
`Life Conformal
`Coating
`Dow Corning®
`Q1-4010 Conformal
`Coating
`Dow Corning®
`1-4105 Conformal
`Coating
`
`1-part, transparent, low-viscosity conformal coating
`
`1-part, transparent, medium-viscosity conformal coating
`
`2-part version of 1-4105 Conformal Coating
`
`Sylgard ®
`1-4128 Conformal
`Coating Kit
`RTV Elastoplastic Conformal Coatings
`Dow Corning®
`1-part, transparent, medium-viscosity conformal coating with
`firm, abrasion resistant surface after cure
`1-2577 RTV Coating
`
`Dow Corning®
`1-2577 Low VOC
`RTV Coating
`
`1-part, transparent, medium-viscosity conformal coating with
`reduced VOC content and a firm, abrasion resistant surface after
`cure
`
`Dow Corning®
`1-2620 RTV Coating
`
`1-part, transparent, low-viscosity conformal coating with firm,
`abrasion resistant surface after cure
`
`Dow Corning®
`1-2620 Low VOC
`RTV Coating
`
`1-part, transparent, low-viscosity conformal coating with
`reduced VOC content and a firm, abrasion resistant surface after
`cure
`
`6
`
`6 of 10
`
`

`
`Potential Uses
`Product
`Solventless Heat Cure Conformal Coatings
`Dow Corning®
`Protective coating for rigid and flexible circuit
`boards. These heat cure, one-part, self-priming
`CC-4555 Long Bath
`coatings cure to flexible, transparent elastomers
`Life Conformal
`ideally suited for electronic printed wiring board
`Coating
`(PWB) applications, particularly those employing
`Dow Corning®
`sensitive components and fine pitch designs.
`Q1-4010 Conformal
`Coating
`Dow Corning®
`1-4105 Conformal
`Coating
`
`Sylgard ®
`1-4128 Conformal
`Coating Kit
`RTV Elastoplastic Conformal Coatings
`Dow Corning®
`Protective coating for rigid and flexible circuit
`boards. These one-part, self-priming coatings cure
`1-2577 RTV Coating
`to flexible, transparent elastoplastic coatings ideally
`suited for electronic printed wiring board (PWB)
`applications, particularly those requiring toughness
`and abrasion resistance.
`
`Dow Corning®
`1-2577 Low VOC
`RTV Coating
`
`Dow Corning®
`1-2620 RTV Coating
`
`Dow Corning®
`1-2620 Low VOC
`RTV Coating
`
`Application Methods
`
`Cure
`
`Applied by dip, spray, brush, flow or
`automated pattern coating. The stable bath
`life of these materials makes them ideal for
`dip coating applications.
`
`Time to cure is dependent on film thickness,
`type of oven, and board population density.
`Heat cure time in the data table gives an
`indication of typical times after the coating is
`heated to the temperature indicated. Highly
`populated, large, heavy boards may take longer
`than the indicated times due to the large thermal
`mass taking extra time to warm.
`
`Applied by spray, brush, flow, dip or
`automated pattern coating. For spraying
`operations, solvent dilution of up to 60% is
`recommended. For dip coating operations,
`material may be used as supplied or solvent
`diluted if a thinner film build is desired.
`Care should be taken to ensure the solvent
`is free from moisture and dip tanks should
`be covered when not in use. For dilution of
`low VOC coatings, Dow Corning® OS-20
`Fluid is recommended.
`
`The time required to reach a tack-free state can
`be reduced with heat. When using heat for this
`purpose, allow adequate time for the solvent
`to evaporate prior to exposing to elevated
`temperatures in an air circulating oven. A
`typical cure schedule for 3 mil (75 micron)
`coatings is 10 minutes at room temperature,
`followed by 10 minutes at 80°C. If the coating
`blisters or contains bubbles, allow additional
`time at room temperature for the solvent to flash
`off prior to oven cure.
`
`7
`
`7 of 10
`
`

`
`TYPICAL PROPERTIES
`Specification Writers: Please contact your local Dow Corning sales office or your Global Dow Corning Connection before writing specifications on these products.
`
`UL Reference4
`
`Approval
`UL 746E
`
`No
`
`Yes
`
`Yes
`
`Yes
`
`Classification
`Flammability
`
`94 V-1
`
`94 V-1
`
`94 V-0
`
` 94 V-0
`
` 94 V-0
`
`Pending
`
`Time, minutes2, 3
`Heat Cure
`
`Time, minutes1
`RT Cure
`
`Time, minutes
`RT Tack Free
`
`7
`
`6
`
`14
`
`8
`
`7
`
`30
`
`30
`
`60
`
`30
`
`30
`
`1 @ 60°C/
`15% RH
`
`2 @ 60°C/
`15% RH
`
`—
`
`1.5 @ 60°C/
`15% RH
`
`2 @ 60°C/
`15% RH
`
`cured
`Specific Gravity,
`
`0.99
`
`1.03
`
`1.04
`
`0.99
`
`0.99
`
`Durometer
`
`26 A
`
`35 A
`
`centipoise or mPa•s
` Viscosity,
`
`400
`
`150
`
`Translucent
`
`57,675
`
`35 A
`
`Translucent
`
`Translucent
`
`350
`
`125
`
`16 A
`
`29 A
`
`Color
`
`Product Form
`
`Product
`
`Solventless RTV Elastomeric Conformal Coatings
`
`Translucent
`
`Translucent
`
`Dow Corning® 3-1753
`Conformal Coating
`
`Dow Corning® 3-1765
`Conformal Coating
`
`Dow Corning® 3-1744
`Conformal Coating
`
`Dow Corning® 3-1953
`Conformal Coating
`
`1-part RTV
`cure
`
`1-part RTV
`cure
`
`1-part RTV
`cure
`
`1-part RTV
`cure
`
`Dow Corning® 3-1965
`Conformal Coating
`
`Dow Corning® 3-1944
`Conformal Coating
`
`Dow Corning® 3140 RTV
`Coating
`
`Dow Corning® HC 1000
`
`Dow Corning® HC 1100
`
`Dow Corning® HC 2000
`
`Dow Corning® HC 2100
`
`1-part RTV
`cure
`
`1-part RTV
`cure
`
`1-part RTV
`cure
`
`1-part RTV
`cure
`
`1-part RTV
`cure
`
`1-part RTV
`cure
`
`Translucent
`
`65,725
`
`29 A
`
`Translucent
`
`35,950
`
`34 A
`
`Gray
`
`Gray
`
`Translucent
`
`Translucent
`
`12,000
`
`24 A
`
`2,375
`
`130
`
`400
`
`22 A
`
`25 A
`
`10 A
`
`1.03
`
`1.04
`
`1.07
`
`1.08
`
`1.01
`
`0.98
`
`16
`
`60
`
`105
`
`72 hr
`
`11
`
`9
`
`15
`
`10
`
`3005
`
`3005
`
`906
`
`606
`
`—
`
`NA
`
`NA
`
`NA
`
`NA
`
`NA
`
` 94 V-0
`
`94 V-1
`
`94 V-0
`
`—
`
`—
`
`—
`
`Yes
`
`Yes
`
`No
`
`No
`
`Pending
`
`Pending
`
`Dow Corning® SE 9157
`
`Dow Corning® SE 9186L
`
`Dow Corning® SE 9187L
`
`Dow Corning® SE 9189L
`RTV
`
`1-part RTV
`cure
`
`1-part RTV
`cure
`
`1-part RTV
`cure
`
`1-part RTV
`cure
`
`1-part RTV
`cure
`
`Solventless Heat Cure Conformal Coatings
`
`Dow Corning®
`CC-4555 Long Bath Life
`Conformal Coating
`
`1-part heat
`cure
`
`1-part heat
`cure
`
`Translucent
`
`5,675
`
`25 A
`
`Translucent or
`Black
`
`Translucent, White
`or Black
`
`26,900
`
`24 A
`
`1,100
`
`17 A
`
`White or Gray
`
`23,300
`
`33 A
`
`1.00
`
`1.02
`
`1.00
`
`1.19
`
`6
`
`8
`
`9
`
`8
`
`305
`
`3005
`
`306
`
`3605
`
`NA
`
`NA
`
`NA
`
`NA
`
`—
`
`—
`
`94 V-0 (Trans -
`lucent only)
`
`94 V-0
`
`No
`
`No
`
`Yes
`
`No
`
`Translucent
`
`225
`
`22 A
`
`0.9817
`
`NA
`
`NA
`
`20 @ 120°C
`
`_
`
`No
`
`Translucent
`
`825
`
`33 A
`
`1.00
`
`NA
`
`NA
`
`10 @ 100°C
`
`94 V-1
`
`Yes
`
`Dow Corning® Q1-4010
`Conformal Coating
`
`Dow Corning® 1-4105
`Conformal Coating
`Sylgard ® 1-4128
`Conformal Coating Kit
`
`1-part heat
`cure
`
`2-part heat
`cure
`
`Translucent
`
`Translucent
`
`470
`
`470
`
`65 OO
`
`65 OO
`
`RTV Elastoplastic Conformal Coatings
`
`Dow Corning® 1-2577 RTV
`Coating
`
`Dow Corning® 1-2577 Low
`VOC RTV Coating
`
`Dow Corning® 1-2620 RTV
`Coating
`
`1-part RTV
`cure
`
`1-part RTV
`cure
`
`1-part RTV
`cure
`
`Translucent
`
`950
`
`20 D
`
`Translucent
`
`1,050
`
`25 D
`
`Translucent
`
`150
`
`25 D
`
`0.97
`
`0.97
`
`1.377
`
`1.507
`
`1.007
`
`NA
`
`NA
`
`7
`
`6
`
`5
`
`NA
`
`NA
`
`60
`
`60
`
`60
`
`10 @ 105°C
`
`94 V-1
`
`10 @ 105°C
`
`—
`
`2 @ 60°C/
`15% RH
`
`2 @ 60°C/
`15% RH
`
`2 @ 60°C/
`15% RH
`
`94 V-0
`
`94 V-0
`
`94 V-0
`
`Yes
`
`No
`
`Yes
`
`Yes
`
`Yes
`
`1-part RTV
`Dow Corning® 1-2620 Low
`cure
`VOC RTV Coating
`1Typical for a 5-mil thickness sample in 180° peel.
`2Time to cohesive failure on a 180° peel strip. Coating strength may continue to improve with time. Thicker samples require additional cure time.
`3To prevent bubbles or voids from forming, applications thicker than 5 mils may require a 5- to 10-minute hold time at room temperature to allow solvents to evaporate before the
`material is exposed to higher temperatures.
`4Refer to Underwriters Laboratory website (www.ul.com) for RTI, minimum thickness, tested substrates and primer requirements. Dow Corning materials are listed in section
`QMJU2 files E81611, E92495, and E229242.
`
`Translucent
`
`350
`
`25 D
`
`1.007
`
`8
`
`5
`
`60
`
`2 @ 60°C/
`15% RH
`
`94 V-0
`
`Yes
`
`8 of 10
`
`

`
`RT, months
`of Manufacture at
`Shelf Life rom Date
`
`at 1 MHz
`Dissipation Factor
`
`at 100 kHz
`Dissipation Factor
`
`at 100 Hz
`Dissipation Factor
`
`ohm-cm
`Volume Resistivity,
`
`at 1 MHz
`Dielectric Constant
`
`at 100 kHz
`Dielectric Constant
`
`at 100 Hz
`Dielectric Constant
`
`2.51
`
`2.5
`
`2.19
`
`2.25
`
`2.56
`
`2.55
`
`—
`
`—
`
`—
`
`—
`
`—
`
`2.3
`
`—
`
`—
`
`—
`
`1.0E+15
`
`0.001
`
`<0.002
`
`2.1E+15
`
`0.001
`
`<0.002
`
`2.5E+15
`
`0.001
`
`<0.002
`
`1.6E+15
`
`0.0007
`
`<0.0002
`
`5.7E+14
`
`0.001
`
`<0.0002
`
`—
`
`—
`
`—
`
`—
`
`—
`
`12
`
`12
`
`12
`
`12
`
`12
`
`Mil Spec8
`
`Dielectric
`Strength
`
`kV/mm
`
`15
`
`15
`
`23
`
`16
`
`18
`
`volts/mil
`
`375
`
`400
`
`600
`
`400
`
`450
`
`Group
`Type, Class,
`
`Specification
`
`Product
`
`Solventless RTV Elastomeric Conformal Coatings
`
`Dow Corning®