

BOSS 389+ weatherproofing silicone sealant is a one-part neutral cure, construction grade sealant that easily extrudes in any weather. It quickly cures at room temperature by reaction with moisture in the air to form a durable, flexible silicone seal. It has medium modulus characteristics.
Features:
Applications:
Colours:
Clear, black, white, dark grey & other colours available on request.
Packaging:
290 ml cartridges.