Review on Black POR-15 Patch - 4 oz Filler & Seam Sealer with Ultimate Adhesive Properties - Repairs Holes, Cracks in Steel, Wood, and select Plastics - Reinforces Weakened Metal by Jeff Aulia

The product itself works but when I squeezed the tube the side of the tube broke and it all leaked out. It's a good thing I was wearing full, thick rubber gloves. I ended up just painting with my gloved fingers as I didn't get a chance to salvage anything unused from the cracked tube. Be sure to wear gloves as this material will not come off your hands. Among other things, I used it to successfully patch 1/4" rivet holes in the floor of my sprint van.