I don’t know we have european producers
It could work seems near g4 from vosschemie
This stuff looks interesting.
Yes it’s a pu 2 components resin. Should be a good candidate for xps adhesion primer.
It will still depend on what the surface energy of PU100 is though (and cost).
With respect to epoxy/PU100 bond strength that is.
Saw this tool while wasting time on the internet.
At 5:37 he presents a homemade pokey wheel, used to perforate plastic stretch film wrapped around a fiberglass sleeve over a wooden mast. This allows the excess epoxy to drain and says it’s easier than sanding afterwards…next level poor mans’ vacuum bag stuff.
They sell it at composit store, here it’s called perfply and it’s the forget by most essential vaccum lam expendable. Need to be choose to keep right quantity of resin in fiber. Key component that allow to not have those porous brittle vaccum bag lam you find everywhere on the market.
Some xps adhesion new test:
Xps250/300, 2lb standard homedepot xps panel here. Hand wire brush prep, 6oz 471 glass, secret sauce (epoxy+micro+silica+flox) seal and lam i one go. Test make with remaining repair materials.
Peel test, where well lam, glass cut and not delam. I impact with hammer and try to peel skin again, no delam. Surprised, i will go deeper with improved test.
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Interesting.
Can you post a picture of your wire brush?
Standard XPS insulation (DuPont & O-C) in my region is 1.5 pcf/25 psi min. comp strength.
I found easily xps from soprema (made in France) 300kpa 28kg/m3 (300psi 1.75lb) or ursa foam same properties.
My wire brush:
Gee, I don’t think I have gotten this many replies to a thread that I started since my 2005; “Et Tu, Brute!” Surftech Rusty @ ASR Show post.
I rode a board maybe a couple of hundred times in about two years made from the blue Dow Square Edge extruded EPS (Now Gray colored). The only thing different in the 'glassing was that it was just final sanded was with a little coarser grit than normal. There were never any Issues like delaminating.
I have done several successful experiments, and applications with concrete adhesive added to epoxy resin, (mostly with microspheres). Just for curiosity I will do a XEPS test panel coated with concrete adhesive, letting it dry and laminating some fiberglass on it just see if that enhances the bond somehow. I’ll try to report back my findings in a month or two.
There is many story of fiberglassed xps diy succes but a lot more of delam problems. Evidences show poor adhesion of composit skins on xps, using something that improve surface polarity (look at stoneburner posts) should be a way of improvement as increase mechanic hook. Best should be a combination of both.
Chemical adhesion of thermoformable plastic is poor to average. Polyester skins peel off polyurethane foam easily like epoxy skin from xps or eps. In fact that’s not resin that separate but foam cells from each others. When you peel skin you can see that cells that stay glue, easy to see when it’s big eps balls.
Diy xps succed because builders don’t cut foam prep and use more fibers, thicker skins, for strengh so foam suffer less of pressure cells break less so less separation.
@lemat
This might have XPS potential.
Potential for bonding XPS to cork?
Possible use as an XPS surface sealer/pre-treatment coat (not as a glue) before epoxy lam? (Watch bond breaking tests in XPS camping trailer video below.)
Break tests start at around 1:37.
Foam Fusion break test at 4:18.
Would the pokey roller increase eps epoxy adhesion? Or unnecessary redundancy?
With the foam fusion product, I’m thinking perforation might be redundant.
However, I would probably do a 120 grit or 150 grit pre-sand, removing all dust before treatment.
Probably best to test all options though.
Plan to call the Foam Fusion folks to get as much of the technical info as they can give me.
Seems a good glue but may be not effective as bond layer, need to try…
I just do some test gluing xos wire prep on 1#eps. With epoxy secret sauce impossible to separate, eps break. With pu structural glue that go deep in eps: stronger, lighter.
It will all depend on the surface energy of the cured glue’s surface.
AKA ; “Woodpecker’s Dildo.”
@lemat
@llilibel03
Interesting to note that the XPS Vespa/scooter camper trailer is made from 1” Owens-Corning (O-C) Foamular 150. The lowest density XPS housing insulation O-C makes (15 psi min. comp. strength).