need schooled on epoxy resin - Ford Bronco Forum
 
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post #1 of 2 (permalink) Old 07-27-2019, 02:46 PM Thread Starter
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need schooled on epoxy resin

I'm going to try to patch a crack in my door panel. It's on the top and I figure to patch it on the backside so hopefully it won't pinch my arm anymore.

Anyway, is there a difference between the two part epoxy adhesive that's available and the two part epoxy that is used for coating and casting?

The coating one seems to come in a bigger quantities and I could find uses for it I'm sure.

But if it won't work I'll just go with the small quantity adhesive.
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post #2 of 2 (permalink) Old 09-07-2019, 08:12 PM
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Originally Posted by ParkerDog View Post
I'm going to try to patch a crack in my door panel. It's on the top and I figure to patch it on the backside so hopefully it won't pinch my arm anymore.

Anyway, is there a difference between the two part epoxy adhesive that's available and the two part epoxy that is used for coating and casting?

The coating one seems to come in a bigger quantities and I could find uses for it I'm sure.

But if it won't work I'll just go with the small quantity adhesive.
Are you filling a crack, or trying to glue it back together?

Is it on plastic or rubber?

Yes there is a difference between all epoxies. The 2 part adhesives are going to dry rock hard, yet still flex a tiny bit. The coatings, at least paints, dry to a very thin Mil and are very brittle when not fully adhered. They generally crack instead of flexing.

For rubber or soft vinyl, an alternative would be a product called "Through the Roof". It's much like that flexseal stuff, but better and not priced out of this world. It would fill a small crack (it's a gel) and smooth out the transition. Caulking could also work very well.

If it's in the rigid plastic, take a piece of tape and put a couple layers on the face, covering the crack with a flexible piece of metal or hard plastic. Use some JB waterweld after scratching up the edges of the crack and the back side around the crack with a scribe and very coarse sandpaper (36 grit best). Fill the crack from the backside ( ) and excessively spill out onto the back face of the panel to give it a firmer hold. Once dry, remove the tape and it should be nice and flush. I did this method on my 85 instrument panel bezel, then even drilled through part of the epoxy with a hole saw. My patches were about the size of a quarter. They are the white spots.



After the hole saw cutting


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