1' Deep Fiberglass Repair
Repairing Machined Holes in Fiberglass. It is low risk because the hole is deep and there is a. Section 2.2 of the Fiberglass Boat Repair & Restoration manual. Home › Automotive › How to Repair Fiberglass. How to Repair Fiberglass. Fill any deep gouges and spend your time sanding out scratches while the.
Click to expand.That sounds really deep. Replace the hull to be safe Just joking. Itchy&Scratchy has it about right. When you apply the gelcoat you can stick cellotape over it to give it a smooth(er) finish, it makes for less sanding.
Fiberglass Repair Instructions
If you have long deep scrapes that is almost through the hull I would suggest you question the strength in that area. Even when fixed up as above the filler would not contribute to any strength.
A bump against the hull in this area may cause the original thin hull area to tear / seperate and make water. You buy this stuff called pigment paste.
4 Inch Deep Fiberglass Shower Pan
You'll have to carefully mix several batches of resin.paste and record amounts (easiest with accurate scales) and let it set. It will change colour a little when is sets. Be sure to sand and buff a portion of teh hull to colour math to, or you will be matching to a faded colour.
As for thick gelcoat, I remember attempting to drill a hole in a brand new Princess motor yacht and a piece of gelcoat about teh size of a tennis ball broke off. It was around 3/8' deep and not at all well bonded to the substrate. Regards, Andrew. Click to expand.Real reason for the cellotape is to keep oxygen off the gelcoat to help it cure. Some others ways are to mix some wax with styrene into the gelcoat or to spray a pva over the gelcoat repair to help it cure. The wax will rise to the top of gelcoat acting the same as the tape or pva.
In short, gelcoat are made to be used in a mold and the side on the mold will cure//hardens because the oxygen is cut off and the laminate side will stay semi hardened/cured or tacky (for quite a while) so the fibreglass laminate will stick to it properly.