OK, my benchwork is covered edge to edge, with 1/2" , 4X8plywood. That is 32 square feet of area to fasten to the 2" blue foam I have bought a couple of tubes of latex caulk for the job.Will a series of beads spaced 4 or 6 inches apart be sufficient. Or will I have to spread a thin covering over the entire sheet? I plan to weight it down with canned goods until it sets up.
Thanks for your input,
BB
It will be more than enough, Bruce. I would suggest making large wavy beads and spreading them in one direction to get max coverage, and then pressing the foam sheets onto those areas with evenly distributed weights, like stacks of magazines about four inches high. When you spread the beads, you are not looking to make it like butter on toast, just smear it as much as it will go with medium effort applied to the spreader. However the stuff smears with one swipe will be good enough.
Latex caulk will work, but this is probably not the best choice for this application. Here is where the Liquid Nails or PL300 comes in. Or yellow glue. I would run a bead along the edges (but not right up against the edge, don;t want it squishing out), and then in a wavy pattern around the inside. You will need weight, and lots of it, to spready ut over the foam surface. Lots of old books and magazines work well. Keep it under weight for at least 48 hours - none of the adhesives mentioned will dry very fast sealed in between the wood and foam layer. For best results just let it go and come back next week.
–Randy
OK guys. Thanks for the replies. I have a great selection of old books that I can use for the weight (wait) lol
BB
Better yet, take an Amtrak ride. By the time you get back it will be as hard as a rock.