Review on 🛡️ Ultimate Rust Protection: POR-15 OEM Bed Liner - Black Truck Bed & Underbody Coating - 1 gl - Supreme Impact Resistance by Bradley Mutha

I love this stuff but BEWARE - it says you can apply it with a brush but you won't get "optimal" results - DON'T USE A BRUSH! The bristles of the brush collect the pieces of rubber and lay them in clumps, after which they cannot be evenly distributed - your work will be ruined. If you use a roller instead, you will get professional results with this product. I used it over the floorboards of an old truck. For small jobs like mine, look for a 1/4" to 3/8" nub roller. I tried one of those cheap little short pile rollers on them and it didn't work properly. the pile was deeper and suddenly everything was perfect. I applied POR15 over a coat after the paint had dried.