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Wrong fiberglass resin?

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Old Jun 30, 2012 | 01:23 PM
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Default Wrong fiberglass resin?

I used 3M fiberglass resin on my 80 to mold the bumper in. I didn't realize that there were 2 different kinds of resin. I have been using 3M fiberglass resin on my 73,77 and 80 for the last 25 years. I never had any problems. My 77 had the front bumper molded in with that for 8 years and it never cracked or had a problem. I put a 3/4 nose on the 73 and never had any problems either. Well the nose on the 80 is all painted so I am not going to change it until something if anything happens.
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Old Jun 30, 2012 | 01:26 PM
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Which 3M resin is it? Does it say "SMC compatible" on it?
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Old Jun 30, 2012 | 01:51 PM
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Originally Posted by zwede
Which 3M resin is it? Does it say "SMC compatible" on it?

It is part number 20124.
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Old Jun 30, 2012 | 02:15 PM
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Can't find any info on if 20124 works on SMC. The 3M 692 resin is OK on SMC, hopefully 3M puts the SMC additive in the 20124 as well. Maybe give 3M a call and check?
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Old Jun 30, 2012 | 02:21 PM
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It says on the can universal and it dosen't shrink. Like I said I have used this before with no problems.
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Old Jun 30, 2012 | 03:33 PM
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If it doesn't have the SMC additive it won't stick. If your repairs are sticking you're good.
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Old Jun 30, 2012 | 06:02 PM
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Originally Posted by zwede
If it doesn't have the SMC additive it won't stick. If your repairs are sticking you're good.

They are sticking fine. I also ground down the nose with 40 grit .There dosen't seem to be any problems. If it happens I will fix it over the winter. But like I said I used it on a 77 and didn't have any problems for the 8 years I had the car.
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