I have made a couple of boards and am comfortable with the layup and prep and stuff. Or at least I thought that I was.
Recently I tried to repair a big delam/bubble/crack for a friend of mine. I prepped everything, rough sanded the rails, made sure plenty to use plenty of resin, and one good heavy hot coat.
I gave the board back to my friend and the resin had had about 3 or four days to cure.
When he took the board out though, the work I had done cracked in a big way.
Can someone please explain what the hell happened? Is there a way to prevent it from happening on the next repair, and what course of action can I take now to salvage the board?
Many thanks to anyone willing to give this a read.
No sir. The original glassine was done via vaccum bag. It is epoxy resin over epoxy resin. The only thing that I can think of is it might have gotten a little cold while the resin was setting? I don’t know if that would have made a difference though?
I used resin research, with their fast hardner and no additive f. It was in my garage here in Florida so I guess the humidity was pretty high, and yes I touched the rails bare handed, but I did a full wipe and dry with gloves on before mixing the resin.
Could the original board have had some sort of ‘speed finish’ (acrylic floor polish/sealer), 2 part clear, or amine blush?
Strong enough to stick to the board but acting like a contaminate between the old and new laminations?
What was used for the wipe and dry?
How warm/cold was it? Florida cold is an oxymoron to us who live where it snows…
Certainly looks like a bonding issue. Could be any of a number of causes. First thought, did you sand the area really well and rough it up good, prior to adding more resin?
I thought that I had prep sanded enough, but it seems the unanimous decision is that my area prep was sub par. So, can I take a dremmel, remove the excess, properly prep the area and then come back with two hot coats and sufficiently seal my mistake? The bottom of the board made a good seal, its just the fiberglass lapping that I laid over the rail because I thought it would help keep everything stable. The main patch was the delam across the bottom. As long as thats sealed and water tight everything else is just cosmetic… Correct?