BOSS 380 RTV Silicone Sealant 10.1 oz Clear

BOSS 380 RTV Silicone Sealant 10.1 oz Clear

The BOSS 380 RTV Silicone Sealant is a professional-grade, one-part acetoxy cure silicone designed for sealing, waterproofing, and bonding applications. This 100% RTV silicone provides excellent adhesion to glass, metal, plastics, wood, and other common construction materials.

In simple terms: This is a flexible waterproof silicone caulk used for sealing windows, doors, HVAC systems, and general construction joints.

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Best For

• Window and door sealing: Weatherproofing exterior joints.
• HVAC applications: Sealing ducts and ventilation systems.
• General construction sealing: Gaps, joints, and fixtures.

Key Benefits

• 100% RTV silicone: Durable long-lasting seal.
• Flexible movement capability: ±25% joint movement.
• Wide temperature range: Performs from -40°F to 400°F.
• Waterproof and weather resistant: Ideal for interior and exterior use.
• Strong adhesion: Bonds to glass, metal, plastics, and wood.
• Fast skin time: Tack-free in approximately 10 minutes.

Typical Uses

• Sealing windows and door frames
• HVAC duct sealing and repairs
• Waterproofing joints and penetrations
• Sealing around vents, fixtures, and trim
• Gaskets in heating and refrigeration units

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Specifications

Brand	BOSS
Product Name	380 RTV Silicone Sealant
Type	Acetoxy Cure RTV Silicone
Size	10.1 oz Cartridge
Color	Clear
Movement Capability	±25%
Service Temperature	-40°F to 400°F
Standards	Meets ASTM C920

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Installation Notes (Best Practice)

• Surface prep: Clean surfaces from dust, oil, and debris before application.
• Application: Apply using a standard caulking gun at a 45° angle.
• Tooling: Smooth sealant before skin forms for best finish.
• Curing: Allow proper curing time before exposure to moisture.

Common Questions

Q: Is this silicone suitable for outdoor use?
A: Yes. It is waterproof and resistant to weather, UV exposure, and temperature extremes.

Q: What surfaces does it adhere to?
A: It bonds well to glass, metal, plastics, wood, and many construction materials.

Q: How flexible is this sealant?
A: It supports ±25% movement, making it suitable for joints that expand and contract.