Talk Composites - The Forum for Advanced Composites

Gel Coat with not enough hardener

http://www.talkcomposites.com/Topic7593.aspx

By Jozi - 8/27/2013 1:56:31 PM

I had to make a few tiny repairs to my mould and mixed up such a small quantity of gelcoat I couldn't measure it properly. Mixing it 10:1 I had about 7-8gr of gelcoat and I added a bit of hardener that was less than 1gr, but I'm not sure by how much. I just had a look at the gelcoat 18hrs later and part of it is hard but some of it feels a bit greasy and smears a little on to my finger when rubbed. Will it harden out eventually and if so how long could it take?
By fgayford - 8/27/2013 9:23:55 PM

Jozi (27/08/2013)
I had to make a few tiny repairs to my mould and mixed up such a small quantity of gelcoat I couldn't measure it properly. Mixing it 10:1 I had about 7-8gr of gelcoat and I added a bit of hardener that was less than 1gr, but I'm not sure by how much. I just had a look at the gelcoat 18hrs later and part of it is hard but some of it feels a bit greasy and smears a little on to my finger when rubbed. Will it harden out eventually and if so how long could it take?


If this is polyester resin just apply some steady heat to it and it should cure fine. If the gelcoat doesn't have airdry (we call it) it will stay tack on the surface
Hope this helps.
Fred