Hotwire & Gorilla Glue

I’m using a Car Battery Charger setup as my hotwire power source. It cuts nice and cleanly. Except when it comes to the PU glue joint, which is a minimal thickness. I’m using 3 layers of 2" thick EPS.

When I have to run along the joint rather than cut vertically through it, The hotwire just can’t get through it.

Any tips & tricks that would resolve this, apart from buying a block of EPS, as I have loads of sheets of 6’ X 4’ X 2" for free.

Many Thanks

You can’t get a nice hotwire cut through the glue. It ain’t gonna happen. Just rip/cut out the chunks, proceed to hotwire to the best possible tolerance and handwork it all. You can fill the chunk holes later with the foamdust and microspheres to get a sandable surface and of course proceed to seal the entire blank with microspheres when your done shaping the blank.

if you use a foam safe spray adhesive to join foam blocks, the hotwire will cut through with no problem.

Roo cuts nicely and is supposed to be more environmentally and user friendly (if there really is such a thing for synthetics)

http://www.rooglue.com/rooclear.html

http://www.rooglue.com/rootac.html

maintains a good hold too

CMP uses it to do his stringer glue ups on his EPS blanks no expansion problems or hand colorization issues like with PU.

He even experimented adding in colors like neon pink or neon green pigement etc to indicate the poundage of the EPS used 1lb-3lb kind of like how Midget does with his PU blanks…

Being the guy he is he even gave me a bottle to try out and play around with…

ended up buy a couple more later at over retail at woodcraft.

Thanks everybody, I tried the spray adhesive previously but found that the propellant used melted the EPS.

I’ll try all the suggestions, thanks again

make sure you use foam safe spray adhesive. You can find it at craft stores for adhering fabric to a foam cushion for upholstry