GC50 delaminated


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fjm9898
fjm9898
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I am not a happy camper today. I spent a bunch of money to have GC50 sent to the US because its the only thing that will work according to Easy Composites.

I followed every direction perfectly and soon as i cut the part, it start to chip up immediately.

I got the mixing portions right, i bought a spray gun. Laid it on a bit thinker, maybe 0.5mil or 0.6 mill, but should not of been a problem since some people brush it on heavier.
i let it stand for about 10 hours, well after the 2-3 cure time and well within the 24hour max out period. i did resin in fusion. i let the resin and the gc50 cure for 3 days. first cut, darn near instantly started to chip up and de-laminate. i used a cutoff wheel and actually moved downt eh part slow and moved fast to see if it was heat or speed, still happened no matter what.

i am at a loss guys. this product was supposed to be aon a show car tomorrow and i completely blew it because of this issue. i really dont understand.

here are a few pictures.
https://scontent.fsnc1-1.fna.fbcdn.net/v/t1.0-9/13627054_10101758362734040_2155620982675042648_n.jpg?oh=ee4c3a0ec1c0f9e76f3e73dccbae2850&oe=57F1354E
https://scontent.fsnc1-1.fna.fbcdn.net/v/t1.0-9/13606973_10101758362758990_8829558832918393004_n.jpg?oh=645c71b97dcbe46f8445be615baccc41&oe=582BB6F1
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fjm9898
fjm9898
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Warren

The GC50 was purchased last week from your site and arrived on tuesday. So if its old, then you sold me bad batch. 

I used Bondo brand MEKP. I dont see how any MEKP would be any different really from the next, but i am no expert. 

The gelcoat was not tacky in the least bit. i even sanded the entire surface to get rid of any high spots to help ensure a perfect weave. the sandpaper and sanding block never ones grabbed the gelcoat and it was a perfect very fine dry powder. So the gel coat not being cured was not an issue. After sanding i didnt use any solvents that may have contaminated the surface, i used a dry cotton rag to clean the sanding dust. 

My shop was set at 72 degrees minimum during the entire process. When doing infusion i run the shop at 80 degrees to help the resin flow. 

Curious. If you say that GC50 and Epoxy is working on a mechanical bond, there why is there a max time limit of 24 hours? A mechanical bond wouldnt care if its been 10, 24, 48, 72 hours. 
Edited 9 Years Ago by fjm9898
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fjm9898 - 9 Years Ago
Hanaldo - 9 Years Ago
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fjm9898 - 9 Years Ago
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