There are over 30 common types of polyurethane sold in tubes, Sealants AND adhesives. I used a product from 3M. Product # 540. This is a Sealant, not an adhesive. I.E, this product does not harden like an adhesive. Gorilla glue is a great product, but you'd need a chisel to remove it after it sets. I just checked & I can still remove the bolts (although it wasn't easy
). I re-sealed the bolts. I'm not saying this is the best option (but it's stronger!). Replacing bad plywood is better (although mine is good yet) Better yet to simply use more & bigger screws. As for selling the Trillium
- I'll be sleeping in the shed if that ever happens
! Our 17 year old daughter wants it when we're done with it. She'll be waiting a long time!