Common adhesive test

[s/v Faith]

I wish this compared marine products like 5200…. But since poly is poly (pl poly is similar to 4200) and two part epoxy (job weld) is epoxy…. I thought this might be useful.

  I recall Kurt mentioning experiments with Gorilla glue, (Iirc it was with closed cell foam)….  Probably worked great for that. 

https://youtu.be/H4xX7VecgzA

[CapnK]

Neat video. Really shows why epoxy is recommended in fixing boats due to its high mechanical/secondary bonding!

What I made was a composite substituting original PU Gorilla Glue in place of resin to bond 1/4" luan to EPS foam. I put 1 layer of glass and some very wet, thinned GG between the luan and foam. I'm not sure if the glass was needed, but my test piece was hella strong. :) Never could figure out a way to get large amounts of thinned wet GG onto a surface and then clamp it tight enough to avoid deformation. Also, having done some laminations since with EPS and glass/epoxy, it bonds fine anyway, so the wood is pretty much redundant.