BOSS 388 Neutral Weatherproofing Silicone Sealant


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Neutral Weather RTV Sealant, 280ml cartridge

Available on backorder | Lead Time: 1-2 Weeks



BOSS 388 neutral weatherproofing silicone sealant is a one-part, neutral cure, low-odour, construction-grade sealant that offers excellent adhesion, weather-resistance, and compatibility with a wide variety of materials.


  • Excellent adhesion to most common building materials
  • Low-odour
  • Non-corrosive to metal
  • Weatherproof and waterproof
  • Service temperature: -40°C to 150°C


  • Ideally suited for weatherproofing, waterproofing, sealing, and expansion of control joints and general-purpose glazing
  • Other bondable surfaces include ACP, anodized aluminium, cement, wood, ceramics, painted surface, and many plastics
  • Works well with glass, glazed surfaces, concrete, and galvanized steel

Additional information

Weight 0.4 kg


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