I have a couple of patches i need to make on the undercover of the fifth wheel.Having trouble getting something to bond the coroplast to the under cover, which I assume is coroplast also.My genuine gorilla tape does not do the job. Poor results with silicone also. I am also cleaning both surfaces with mineral spirits and drying first.What is a guaranteed, never come off way to stick the patches on there?I am thinking eternabond but if it works like my roll of gorilla tape, I would hate to invest the time and money.thanks

Gorrillia tape the other thing to do is some 1×2 on the inside and screw a piece of plywood to the 1×2 you can also buy some belly tape from a mobile home place

Just remember there are two types of bonds chemical and mechanical. Coroplast is a thermoplastic and most are chemically inert so solvents won't prepare the surface well for a chemical bond. Most thermoplastics respond better to a mechanical bond. So if you sand the surface well to roughen it adhesives will adhere better. I use Shoe Goo for these type of plastics. Epoxies or caulking like 3M 5200 will also work if the surface is abraided well.

When I cut access holes in mine , I had gotten some storage containers (black) with lids.. I cut the flat part off the lids out and cut the access hole smaller.After I was done , I applied some Heavy Duty black adhesive/sealant around the edge . placed the patch on it and used small self tapping stainless steel screws to secure. It held up till the day I got rid of the trailer..

Aerosol foam insulation (in a can) seems to stick like crazy to everything. It even grabs Teflon.

What Sticks to Coroplast? | Good Sam Community

26 Replies

Dave_H_M
Explorer II
Oct 22, 2015
That is a good idea Mex.

That stuff is nasty to work with but may be the cat's meow.

Ford man, what kind of sealant are you referring to?
MEXICOWANDERER
Explorer
Oct 22, 2015
Aerosol foam insulation (in a can) seems to stick like crazy to everything. It even grabs Teflon.
ford_truck_guy
Nomad
Oct 22, 2015
When I cut access holes in mine , I had gotten some storage containers (black) with lids.. I cut the flat part off the lids out and cut the access hole smaller.
After I was done , I applied some Heavy Duty black adhesive/sealant around the edge . placed the patch on it and used small self tapping stainless steel screws to secure. It held up till the day I got rid of the trailer..
K_Charles
Explorer
Oct 22, 2015
Sew it up with mechanics wire.
Gjac
Explorer III
Oct 22, 2015
Just remember there are two types of bonds chemical and mechanical. Coroplast is a thermoplastic and most are chemically inert so solvents won't prepare the surface well for a chemical bond. Most thermoplastics respond better to a mechanical bond. So if you sand the surface well to roughen it adhesives will adhere better. I use Shoe Goo for these type of plastics. Epoxies or caulking like 3M 5200 will also work if the surface is abraided well.
newman_fulltime
Explorer II
Oct 22, 2015
Gorrillia tape the other thing to do is some 1×2 on the inside and screw a piece of plywood to the 1×2 you can also buy some belly tape from a mobile home place

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What Sticks to Coroplast?

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