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There is rule when doing glass work/fiberglass repairs. Epoxy bonds to resin but you are never to use regular polyester or vinyIester resins over epoxy. Basically epoxy two part bonds securely to everything.Resins bind to resin obviously. however in boat repair we tend to step up a grade in a lot of repairs. Ie a regular general polyester hull is repaired with vinylester for better strength. It is also a mechanical bond vs a chemical bond as when the it was first constructed.make sure surfaces are roughed and clean. When doing glass work the raw prepped repair is often ground with a 24 or 36 disc to maximize the bond.Do not buy junk. Composites Canada will offers a large range of products and you might get some good advice if you go in person re how the various fillers etc are created from the epoxy base with granulated additives and powders. http://www.compositescanada.com/The additives change consistency, bonding characteristics and workability. You can buy fast and slow cure. In this case fast cure is fine as slow cure is often used for large repairs that require a long working time. The more you mix at once the greater the heat given off by the exothermic reaction. So watch your time. The mixing pot can kick off fast if you are not prepared to apply it right away. I come from a boat repair background and repaired everything from canoes to high performance offshores.
There is rule when doing glass work/fiberglass repairs. Epoxy bonds to resin but you are never to use regular polyester or vinyIester resins over epoxy. Basically epoxy two part bonds securely to everything.Resins bind to resin obviously. however in boat repair we tend to step up a grade in a lot of repairs. Ie a regular general polyester hull is repaired with vinylester for better strength. It is also a mechanical bond vs a chemical bond as when the it was first constructed.make sure surfaces are roughed and clean. When doing glass work the raw prepped repair is often ground with a 24 or 36 disc to maximize the bond.
Do not buy junk. Composites Canada will offers a large range of products and you might get some good advice if you go in person re how the various fillers etc are created from the epoxy base with granulated additives and powders. http://www.compositescanada.com/
The additives change consistency, bonding characteristics and workability. You can buy fast and slow cure. In this case fast cure is fine as slow cure is often used for large repairs that require a long working time. The more you mix at once the greater the heat given off by the exothermic reaction. So watch your time. The mixing pot can kick off fast if you are not prepared to apply it right away.
I come from a boat repair background and repaired everything from canoes to high performance offshores.
