SHIPPING NOTES: Due to the Coronavirus COVID-19 pandemic, USPS, and UPS have announced several service delays and slowdowns that will effect your ability to receive shipments in the estimated days to delivery. Please allow additional time for your order to arrive as the USPS, and UPS will now require more time for packages to be delivered due to limited transportation availability, and higher than normal online purchases as a result of the (COVID-19) pandemic.
BOSS Products


Conspec Family Business BadgeConspec Warranty BadgeSmoke & Draft Sealant


$10.95 $8.65

BOSS – 136 Fireblock Draftstop

BOSS – 136 Fireblock Draftstop Sealant is a single component sealant and is a noncombustible filler caulking used for fireblocking applications in the annular space around wires, pipes, ducts, vents, cable lines and other penetrations to the building envelope. It is a non-slumping sealant that sets to form a hard surface. BOSS® 136 can be applied to any gap or penetration where the specification is noncombustible and/or ASTM-E136 rated. BOSS – 136 FireBlock is to be used for interior applications only.

• Meets ASTM E-136
• BOSS® 136 is completely nontoxic and contains no asbestos or PCBs.
• Noncombustible
• Applied with a conventional caulking gun
• Easily applied sealant with water clean up capabilities
• An accredited fire block/smoke seal caulk
• Single component system, no mixing necessary and no additions required
• Meets residential construction code approvals including I.R.C.
• For interior applications only
• Excellent adhesion to a wide variety of substrate material

PDF-iconTo view the technical Data Sheet please CLICK HERE

Weight 16 oz
Dimensions 2 x 2 x 9 in
Product Type


Product Color


Product Size


You may also like…