what do you line the undeside of the flour with???

[mjewell5]

It took some work, but I did my bottom with a roofing material called Peel & Seal. It is aluminum faced with a super sticky tar-like glue that holds really well. I started at the back and worked forward, so that I could overlap each layer. Added probably 50 pounds, but I am 100% certain that it is sealed up tight! Used as a roofing material and installed per the instructions, it is warranted for 20 years. It ought to last forever on the bottom of my tear.

[GPW]

Hard to beat the old roofing cement coating ( black nasty stuff) .... inexpensive , proven to work ... just takes a bit of labor to apply it ... We tried the spray can undercoating .... Nice , easy to apply , but not as secure as the BNS ... Way more expensive too for spray cans ...

[GPW]

Roller ??? That would be Nice huh .... You know ( or may not know ) last time we did a BNS roofing cement coating on a trailer bottom we used a wide putty knife to force the BNS into every nook and cranny ( What is a “cranny” anyway, or nook for that matter ? ) for complete coverage ... easier than trying to brush it on , even after we left the can out in the Sun to soften a while ...