Sale! BOSS 380 Contractors 100% RTV Silicone Sealant
BOSS ProductsBOSS 380 Contractors Silicone available at Conspec Materialsboss 380 contractors RTV silicone sealant for weathersealing Florida Tampa


Conspec Family Business BadgeConspec Warranty BadgeOne-part acetoxy cure adhesive 100% RTV silicone, Industrial, Commercial Grade.

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BOSS 380 Contractors Silicone Sealant

BOSS – 380 Contractors RTV Silicone is a one-part acetoxy cure adhesive sealant that is suitable for general construction sealing and adhesive applications. This product will adhere to clean metal, glass, many types of wood, silicone resins, vulcanized silicone rubber, ceramics and plastic surfaces. A primer may be required for optimum adhesion to some substrates. Meets ASTM C920, packaged 12 per case, in stock and ready to ship

  • Suitable for general construction applications
  • Movement Capability ±25%
  • Service Temperature -40° to 400°F
  • Tack-Free 10 – 20 minutes
  • Meets ASTM C-920
  • Screw-on Nozzles included
  • Provides weatherproof and waterproof seal
  • Resists ozone, UV radiation and temperature extremes
  • Fills and seals gaps around windows, doors, vents, fixtures and lights
  • Seal electrical connections and boxes to waterproof
  • Seal cracks in interior walls and ceilings, door joints and fixtures
  • Seal leaks in gutters, downspouts, ducts and piping
  • Seal cracks or gaps around windows, vents, ducts, fixtures and lights
  • HVAC Sealing heating, ventilating or air conditioning duct work
  • Bond gaskets in heating and refrigeration units



To view the most recent Technical Data Sheet, please click here.

Weight 20 oz
Dimensions 2 x 2 x 13 in
Product Color

Almond, Aluminum, Black, Bronze, Clear, White

Product Size

10-oz Cartridge

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