Post #726323 by Humuhumu on Wed, Aug 27, 2014 1:59 PM

I do both sides. It absorbs a bit, but that varies depending on how porous the surface is that you're coating. I didn't count on it to soak in enough to protect the other side, even on very loose weave, thin, grass matting. It's worth considering where your most likely sources of fire would be: I was particularly thorough in the sections that would be near electrical boxes (though there's other barriers in place). Basically: what will help you sleep better at night? When in doubt, fire retard it.