Fire Barrier Moldable Putty Stix MP+, Red Color, 1.45 in x 6 in

Very easy to work with. A little tacky on your hands so maybe wear some gloves. Its a block of putty. Fill the holes and make your inspector happy.

This is the Ul/CSA certified stuff that works! I was rebuilding a Suburban RV furnace and needed a fire/heat certified putty to replace the 30 year old stuff used to seal the fuel gas supply line between the heat exchanger and blower enclosure. This is a fire safety item and I did not want to trust the foreign-sourced material. I was delighted to find this 3M product here on AMZ. Genuine 3M quality sticky stuff that seals perfectly and likely to endure another 30 years. I had to look up the word 'intumescent' lol. Oh, yeah, just what is needed.

This is a great solution to fix air leaks in exterior outlets when a gasket alone isn’t enough. Simply find and Seal the air gaps in the electrical box behind the outlet to stop the airflow at the source.

I needed something to block openings around the electrical boxes for lights and smoke detectors in my ceiling, and this is a much better option than only using caulk (at least in areas where the red color doesn't show). I'm impressed with how easy it is to mold into the right shape with its putty consistency - as well as its ability to be stuffed into odd shaped openings. The fire retardant capability is a great plus

The pictures are deceptive. I was comparing with others and they weren't consistent. One was in fluid ounces another in pounds. I should have known. Not a horrible price but now I have to order another tube.

I bought this to fireblock a short 2-foot conduit I ran from the electrical panels in my garage through the rim joist into the basement to carry a bunch of yellow 12 gauge Romex wire. The inspector didn't care if I fireblocked it or not but I did, as I also want to keep bugs from using the conduit as a superhighway and I try to keep my house as tightly air-sealed as possible. This stuff was easily moldable and mashable and did the job with no problem. I sealed the conduit from both ends for good measure. I have a bit leftover from the job that should keep for a long time in the original tube.

You can't beat the standard 3M CP-25WB+/10.1 10.1 Oz. Fire Barrier Sealant (Pack of 1) for fast application, but I really like this moldable putty for small jobs, and jobs you may have to pull the plug out, install another cable, and stuff it back in. I don't have to try and keep a tube of caulk from drying out, I don't get red caulk all over everything, and the putty is stiff enough to plug the sloppiest hole. I always keep one in the tool box. Just pinch off as much as you need and stuff it in the hole, great for remodel jobs.

I've been using 3M fire barrier for 30 plus years. As a requirement under the National Fire Protection Association, it is a requirement when running telecommunications cables through firewalls. Every now and then, I pick up a project that requires me to use this. It is most always readily available, and the price is competitive with other manufacturers. It is also moldable to any form. In my opinion, this is the best fire barrier on the market.

I use this for blocking holes in engine firewalls. It molds easily around cables and wires and sticks well to block the holes. I have not checked its fire resistance. After a year it is still flexible and stuck in place. Does the job of blocking fumes from making their way out of the engine compartment.

Es para huecos pequeños no se adhiere la superficie si esta sucia procura comprar de más para que no tengas este inconveniente

Very workable and hopefully flame proof putty. Easy to work with and good to put a temporary seal around air drafts.