Master Flame Class A Fire Retardant Spray for Wood, Fabric, Cotton & More - Non-Toxic Flame Retardant Coating - Meets NFPA 701 & ASTM E84 - Made in USA - Easy to Apply and Dries Clear - 1 Gallon

I bought this to mix with paint to paint my exposed basement posts, beams, and joists. I mixed a full gallon of this with a little less than a gallon of latex paint. I did a couple tests on some scrap boards first, and it didn't work when I first tried it, but I missed the part about waiting 24 hours. Tried it again the next day and board turned a little brown, but would not burn and hardly even smoked. This seems to work exactly as described and is way better than nothing. I used a small foam roller to apply this to the exposed wood in my basement, to give it a nicer finished look, while adding fire protection without having to wrap everything in a bunch of drywall. This product makes the paint super thin and watery, and it drips EVERYWHERE, so I ended up masking things off almost as much as i would have if spraying. Also, because of how thin it is, it takes many many coats to achieve a uniform opaque color. I think I did 5 coats before I couldn't see the old paint colors where some of the wood had been painted decades ago. This product also separates from paint really easily, so you have to keep mixing it throughout your project if using very much. It probably separates as much as 90% after sitting for just an hour, and after being left overnight I could probably pour the Master Flame back into the bottle, leaving the paint behind. I'm glad i found this product as it's saving me from having to wrap things in metal or drywall, and gave me justification for painting the entire basement ceiling (instead of just the areas that were previously painted blue, green, or cream. I used up the first jug and just bought another, I'll probably need a 3rd to finish the entire project, it's an 1100sf basement with 100 year old wood that sucks up the first 2 coats of paint. I took 1 star off for how thin it makes the paint and how quickly it separates. It would be nice if they had a thickening agent you could add or they could get it to bond with the paint.

Flame tested and this product is great. Sprayed with HVLP gun on seat material and wool product. Will not burn even with constant fire by blowtorch.

There are NO instruction on the can or included. This is the link to their web site, where documentation in actual english is available. Goint to use over boilers and solar installations.

Couldn’t be easier to apply, covers a lot of area thoroughly. Haven’t tested its fire resistance however. Appreciate that the chemicals don’t seem particularly dangerous to work with.

Did a test on an old piece of wood. It seems to really work. Remember it is a fire retardant not fire proof

Used this as a seal coat on wall framing , sheetrock and wood trim. I made treated and untreated samples of the framing wood, sheetrock and painted wallpaper on sheetrock. They were tested by the local fire department. The untreated samples burned easily, but the treated pieces were difficult to burn.

So I read a lot of the complaints on this product due to those who wanted to mix it with paint. The instructions I received on my bottle said to apply the retardant to the surface by itself. Let it sit for 24hrs then paint. The application of the retardant was easy. The application of the paint was spot on with other complaints. I tried using a roller first but that was a huge mistake on my part so I had to start over. The second time I tried painting, I used my air gun, thinned the latex paint (a lot) then sprayed it on my surface which was wood. Based on my second attempt, i think this is the way to go. Apply the retardant then apply thinned out latex paint with an air gun. I will post with any updates.

I mixed this 50/50 with some left over latex ceiling paint and applied it to the kraft paper backing found on insulation. It will be many years before I sheet rock the walls in our basement and was worried the kraft paper backing posed a substantial fire hazard. A test of my 50/50 mixture on a scrap piece of insulation showed this stuff works! An untreated piece of kraft paper burned immediately, and once ignited stayed burning. The treated (painted) sample would not ignite...I used a barbecue starter torch and the best I could get was a smolder that extinguished as soon as the flame was removed. This stuff is not inexpensive - but works as advertised. My application was residential so I did not need to get the Fire Marshall involved - but it did seem a bit difficult to find the paperwork for this on the companies web site. If your application must pass an inspection I'd recommend downloading and printing the spec sheets first - showing it to your local Fire Marshall or inspector - and making sure this paperwork is sufficient to pass.

Thank you for this excellent product. It is very light and easy to apply, and the wood absorbed it completely without leaving any residue. The material was tested using the ignitability test according to BS EN ISO 11925-2:2020, and it performed very well.