Product Description:
3M SIL100 Black is a high-performance 100% silicone sealant ideal for sealing, bonding, and repair applications that require excellent weather resistance. It provides superior adhesion to a wide variety of construction and industrial materials, making it suitable for gutters, roofing, awnings, water tanks, coated metal panels, automotive parts, and marine applications.
Made from 100% pure silicone, this sealant offers excellent flexibility, durability, and heat resistance — without harsh odors or corrosive acids.
Key Features:
 
 
100% pure silicone formulation for long-lasting performance
 
 
Excellent weather, UV, and temperature resistance (−62°C to 204°C)
 
 
High elasticity and flexibility for joint sealing and movement accommodation
 
 
Neutral cure — non-corrosive, low odor, and safe for metal surfaces
 
 
Fully fills gaps and prevents leaks and seepage
 
 
Easy to apply with a standard silicone gun

Recommended Applications:
 
 
Construction: gutters, roofing, awnings, water tanks, coated metal walls
 
 
Industrial: sealing and repair work in HVAC, plumbing, and machinery
 
 
Automotive and marine: sealing joints, gaps, and panels
 
 
Works well with glass, ceramics, aluminum, steel, zinc, lead, copper, brass, painted surfaces, plastic, and non-oily wood

Application Instructions:
 
 
Clean the surface thoroughly — ensure it is dry, free of dust, grease, or oil.
 
 
Insert the cartridge into a standard silicone gun.
 
 
Cut the nozzle tip at a 45° angle and apply the sealant evenly along the joint or surface.
 
 
Smooth and finish the sealant before it cures for a neat, watertight result.