Dowsil 3-1953 is a room tempe
rature cure, medium viscosity, solventless elastomeric conformal coating. This innovative product is suitable for the automotive, lighting and industrial industries while being IPC, UL and Mil Spec approved. Dow 3-1953 is formulated to provide good adhesion to most common electronic substrates and materials. The conformal coating meets various coating standards for electronic printed wiring boards, rigid and flexible circuit boards, fine pitched designs and sensitive components.
Dowsil 3-1953 Conformal Coating is a one component, soft translucent, polydimethylsiloxane material. It provides good adhesion to a variety of substrates while improving reliability against stress. Viscosity of this coating is 350 cP and the specific gravity cured is 0.98. Dowsil 3-1953 has a tack-free time of 8 minutes at a temperature of 25 degrees Celsius. Operational temperature range is between -45 to 200 degrees Celsius for long periods of time. The time to cure will be dependent on film thickness, application method, temperature and humidity. If speed cure is required, mild heat of 60 degrees Celsius or less can be used. Application methods include flow, brush, spray, automated pattern coating and it may also be dip coated with special precautions. Adhesion typically lags behind a full cure when dealing with RTV coatings. A full cure of the material may take up to 72 hours at room temperature. Pot life of Dowsil 3-1953 is dependent on the application method used. To extend the pot life it is important to minimize the exposure to moisture by using dry nitrogen blanketing or dry air.
When dealing with Dow 3-1953 conformal coating it is extremely important to understand the limitations, proper handling precautions and the correct way to store the product. Special precaution is needed to prevent the material from coming into contact with moisture. Containers should be stored in its original package with the lid closed tightly to avoid contamination. Shelf life will be stated on the label and the product should be used before it is expired. It is recommended to purge partially filled containers with nitrogen or other gases to avoid contamination. Dowsil 3-1953 offers excellent reparability on electronic devices because it can be removed by cutting, scraping or by using solvents. Soldering iron may be used if only one circuit component is to be replaced. It is very important to use proper ventilation and avoid fumes when a soldering iron is used. For more information in regards to this advanced conformal coating, refer to the DC 3-1953 MSDS.
Dowsil 3-1953 is a RTV silicone that provides a good bond for electronic devices. Dow’s advanced engineering background and their desire to research and develop innovative products have made them one of the best manufacturers of silicone materials. DOW 3-1953 is a high performing RTV silicone that is used as an adhesive for a variety of electronic components. For more information in regards to Dowsil 3-1953 Conformal Coating, Contact Krayden Inc., a specialized distributor of Dow’s silicone material. If more information is required of the product, the Dowsil 3-1953 TDS is available.
