greybeard
Herd Master
Works pretty good to seal off leaks on the floor of a flat bottomed aluminum john boat too.....till the summer sun hits it and every time you move your feet you leave a string of tarry looking stuff..I've been waiting 3 months now for some to harden up so I can overspray it with truckbed liner.I used 3/4" pressure treated plywood for the floor. It will take a while for moisture to do any real damage to it. In the past I've used a product called black jack https://www.lowes.com/pd/BLACK-JACK-Rubr-Coat-4-75-Gallon-Fibered-Roof-Sealant/3043257 on the floor