Dowsil 3145 Clear non-corrosive silicone adhesive sealant, 90 ml

One-component room-temperature-curing silicone adhesive sealant. Thick, does not sag on vertical surfaces and cures with air moisture into elastic rubber. Non-corrosive: unlike ordinary acetoxy (vinegar-smelling) silicones, it releases no acid and does not damage copper, brass or electronic contacts.

Application:
- bonding and sealing metal, glass, ceramics, painted surfaces and silicone rubber
- sealing housings, modules, connectors and cable entries
- fixing components on printed circuit boards, insulating leads and wires

Features:
- meets US military specification MIL-A-46146 (Group II, Type I) for electronics-safe adhesive sealants
- high tensile strength and elongation: the joint withstands vibration and thermal expansion of parts
- no mixing or oven needed; curing can be accelerated by heating up to 60 °C
- skins over in about an hour, reaches main strength in 1–3 days
- cures from the surface inward, so not suitable for closed cavities or thick potting
- poor adhesion to PTFE, polyethylene and polypropylene

Application procedure:
1) clean and degrease the surfaces with a solvent (white spirit, naphtha), then wipe with alcohol or acetone
2) apply the adhesive sealant
3) join the parts before a skin forms

Brand DOWSIL (Dow, formerly Dow Corning)