- Ready-to-use formula, no mixing required
- Dries to red color, and is paintable
- Ideal for sealing in fire-rated construction
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Frequently Bought Together
Product Overview
- Excellent adhesion
- No-sag, non-halogen formula
- Paintable
- Protects against fire for up to 4 hours
- Expands when exposed to heat to protect against smoke and toxic gasses
- Dries to the touch in 15 minutes
- Fire stop tested up to 4 hours in accordance with ASTM E 814 (UL 1479) and CAN/ULC S115
- Fire resistance tested for static construction joint systems in accordance with ASTM E 1966 (UL 2079)
- Helps minimize sound transfer
- Re-enterable/repairable
- This product qualifies as an intumescent fire caulk
- Need help choosing the right Caulk? Click Here for Home Depot's Buying Guide!
- Click Here for the How to Caulk Project Guide
Info & Guides
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Dimensions
Details
Warranty / Certifications
Questions & Answers
HOW MANY SQ FT DOES ONE TUBE DO
Asked by RG May 27, 2021Each product will have different requirements based on the application and the depth that it has to be installed. We would direct you to 3M.com to locate the data sheet.
can this be used specifically for exterior use - to seal flue as it exits the chimney crown?
Asked by vincent March 21, 2021This product is not specifically designed for outdoor use, if may work but breakdown and begin to leak overtime. It is also not required as a hourly rated fire block is not needed to the outside. I would recommend a high temp silicone sealer like the Rutland brand high temp silicone, which is designs for exterior use.
can I use this product to seal the cracks in my fireplace Rock
Asked by joe February 20, 2021This product is not intended for that application. You have to use refractory mortar for any repairs within fire chamber.
Can I use this to fill the gaps in my metal firebox which was installed we converted a wood burni...
Asked by Vickie January 9, 2021Not really a good application for this product. this caulk is an intumescent caulk, which means it will expand quite a bit if it gets hot. It would be better to use something like the DAP brand high heat mortar caulking.
Can this be applied on a shower liner between the durock and liner?
Asked by Ame64 October 19, 2020This product is not designed for use on shower liners. Mike
Can this be used "panel-glue style" to adhere sheets of 1" deep Rockwool (fire retardant insulati...
Asked by JJ October 13, 2020Can this be used to seal a pulse jet engine's combustion chamber?
Asked by Crimson September 28, 2020Can this be used around heating pipe? I want to block the draft from upstairs to my basement. T...
Asked by Kris September 10, 2020Hello. Due to the technical nature of your question, please contact our team directly at 1-800-494-3552 M-F 8am-5pm CT so we can gather more information to better assist you. Thank you.
Can this be effective to use on fireplace to caulk around the propane pipe?
Asked by stella August 2, 2020Hello. Due to the technical nature of your question, please contact our team directly at 1-800-494-3552 M-F 8am-5pm CT so we can gather more information to better assist you. Thank you.
Can this be used with XPS foam or does it cause degradation to the foam?
Asked by RJ July 24, 2020Hello. Due to the technical nature of your question, please contact our team directly at 1-800-494-3552 M-F 8am-5pm CT so we can gather more information to better assist you. Thank you.
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