Fireproofing product supplier since 1998

UL Classified Intumescent Caulk


■ This UL Classified fireproof caulk expands when exposed to fire or extreme heat, forming an insulated char barrier.
■ 4 hour fire rated.
■ Available in single 10.1 ounce tubes and cases of 10 each.
 Download TDS
■ Quantity Discounts On Five Or More


Firestop 814 Plus Intumescent Caulk

is the contractor’s choice solution for sealing voids. This remarkable caulk is not your ordinary sealant; it is UL Classified and has been specifically designed to expand when exposed to fire or extreme heat for 4 hours.

With its unique properties, it forms an insulated char barrier that effectively prevents the spread of flames and smoke. With a 4-hour fire rating, Firestop 814 Plus Intumescent Caulk provides you with the confidence and peace of mind you need to protect your property.

Whether it’s in residential, commercial, or industrial settings, this caulk is the ideal choice for ensuring the highest level of fire safety. The exceptional expansionTrust our UL Classified intumescent caulk to provide unmatched fire protection for up to 4 hours. Get peace of mind with our high-quality Intumescent caulk capability of this intumescent caulk allows it to fill gaps and cracks, creating a strong barrier that effectively seals off any potential fire hazards.

It works seamlessly on various surfaces, including wood, concrete, metal, and gypsum board. Its easy-to-use formulation ensures hassle-free application, making it suitable for both professionals and DIY enthusiasts.

Not only does Firestop 814 Plus UL Classified Intumescent Caulk excel in its fireproofing capabilities, but it also offers long-lasting durability. Its high-quality composition ensures that it maintains its effectiveness even after years of use.

This means you can trust it to provide continuous protection against fire hazards for an extended period. Invest in Firestop 814 Plus Intumescent Caulk today and safeguard your property from the devastating effects of fire.

Don’t compromise on safety when it comes to protecting what matters most. Trust the industry-leading fireproof caulk that expands to provide an impenetrable barrier against flames and smoke. Choose Firestop 814 Plus UL Classified Intumescent Caulk for unparalleled fire protection that lasts. Firestop 814 Plus can be used for interior or exterior applications and can be painted over.

Firestop 814 Plus is designed to restore the fire ratings of walls and/or floor assemblies by stopping the spread of fire by filling the voids and gaps for electrical through penetrations, mechanical through penetrations, structural through penetrations as well as between fire resistance rated wall or floor assemblies.

It is typically used in mechanical, electrical and plumbing applications to firestop openings created by the following penetrations in fire-rated floors, floor, ceilings or walls, metallic pipe, plastic pipe (e.g. PVC), conduit, power and communication cable, cable trays, busways, combos, insulated pipe and HVAC duct penetrations.

This intumescent caulk is also used to firestop openings and bottom of wall construction joints. Firestop-814 Plus fireproof caulk is a highly flexible, general purpose firestopping sealant that conforms to ASTM E-814 (UL 1479) standards for multi-family and commercial firestopping applications.

• Tested to ASTM-E814 (UL 1479)
• Tested to ASTM-E1966 (UL 2079)
• Meets 51 STC Rating
• Intumescent & Elastomeric
• Up to a 4 Hour Fire Rating
• For Use in Multi-Family and Commercial Construction
• Red Color
• CPVC Compatible
• V.O.C. Content = 10 g/l

Product Features:
• Chemically compatible with pipe fittings as well as all PVC, CPVC, ABS, PEX tubing and other tested penetrating items.
• Excellent Freeze/Thaw
• Smooth Consistency
• Identifiable Color
• Low V.O.C.’s

*For larger voids, see our UL Classified Intumescent Pillows
**For protecting electrical boxes, see our UL Classified Putty Pads

Weight N/A
Dimensions N/A
Tube Size

10.1 Ounce, 20 Ounce


Each, Case (10 ea)

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