FAQs
What is DOWSIL 3145 used for?
It is a one-part, room-temperature-curing silicone adhesive used to assemble printed wire boards and to seal housings, modules, and electrical leads. Non-flowing and high in strength, it forms durable, flexible bonds and seals, and it is qualified to MIL-A-46146 for demanding electronic applications.
How does 3145 cure?
3145 is a moisture-cure RTV adhesive that cures at room temperature upon exposure to atmospheric humidity, changing from a paste to a durable elastomer. Because moisture drives the cure, cure speed and depth depend on humidity and section thickness, so deep or confined sections cure more slowly than thin ones.
What standards does 3145 meet?
Dow states 3145 is MIL-A-46146 qualified and UL recognized, making it suitable for applications requiring those recognitions. Because listings can change and depend on grade, users needing formal qualification should confirm the current MIL and UL status for their specific product and application.
Why is 3145 described as high strength?
It combines high tensile strength, high elongation, and high tear strength, so the cured adhesive resists pulling apart, stretches to accommodate movement, and resists tearing. This robust mechanical performance suits electronic assemblies and housings that must endure handling, vibration, and service stresses.
Is 3145 suitable for vertical or intricate surfaces?
Yes. Its non-flowing consistency helps it stay where placed rather than running off before cure, which is useful for controlled bonding and sealing on vertical or intricate electronic assemblies. Confirm the specific handling behavior for your application in the technical data sheet before production.
