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Conspec Family Business BadgeConspec Warranty BadgeOne-part, neutral curing, medium modulus glazing silicone

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BOSS – 399 100% Glazing Silicone

BOSS – 399 100% Glazing Silicone Sealant is a one-part, neutral curing, medium modulus sealant formulated for the window and door glazing market. It offers primerless adhesion to vinyl, wood and aluminum. For use as a primary back bedding compound as well as a perimeter weatherseal for field glazing and window installation. Bonds to Kynar 500, and is VOC Compliant in all 50 states. Special colors available upon request.

• VOC Compliant in all 50 states
• Low odor
• Excellent backbedding sealant
• Medium modulus
• Primerless adhesion
• Bonds to Kynar 500®



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

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

Beige, Black, Bronze, Clay, Clear, Cocoa, White

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