Pieyed47
Senior Member
When I need a butt block or a backer block, I go down to my local Home Depot and get a flooring sample that is waterproof. Some are guaranteed for more than 30 years, and use for this for my jobs. I have run a few tests by soaking samples in water. I like bamboo samples for butt blocks that might become submerged in water and it works for me. It only costs me the gas to go get it. Costs me nothing if I'm going that way anyway. (FRUGAL or CHEAP ?)