Forums > Windsurfing General

Another board repair question

Reply
Created by onshoreroy Thursday, 11 Dec 2025
onshoreroy
59 posts
Thursday , 11 Dec 2025 6:39AM
Thumbs Up

I've got a small puncture-about 4 mm-on the bottom of my board. I've filled the hole with resin, but I'm wondering: can I lay a small piece of fiberglass over the repair without[/b] sanding off the paint first? Or will it not bond properly?

Mark _australia
WA, 23433 posts
Thursday , 11 Dec 2025 10:51AM
Thumbs Up

Nooo
gotta sand it

onshoreroy
59 posts
Thursday , 11 Dec 2025 5:00PM
Thumbs Up

Sand it or sand the paint off down to black stuff

onshoreroy
59 posts
Thursday , 11 Dec 2025 5:00PM
Thumbs Up

Thanks, sand it or sand the paint off down to black stuff ?

Mark _australia
WA, 23433 posts
Thursday , 11 Dec 2025 6:25PM
Thumbs Up

Paint off. dont sand till you hit black you may not find it lol
it will be obvious when paint then undercoat /primer is gone and you hit filler coat / laminate

Muppet
WA, 106 posts
Thursday , 11 Dec 2025 7:43PM
Thumbs Up

Select to expand quote
onshoreroy said..
I've got a small puncture-about 4 mm-on the bottom of my board. I've filled the hole with resin, but I'm wondering: can I lay a small piece of fiberglass over the repair without[/b] sanding off the paint first? Or will it not bond properly?


Sounds a little excessive for a 4mm puncture to me.

Mark _australia
WA, 23433 posts
Thursday , 11 Dec 2025 7:51PM
Thumbs Up

I agree but just filling a hole with resin it may not bond to the paint in the depression. So with no prep before fill, yeah now I'd glass it

jn1
SA, 2627 posts
Friday , 13 Dec 2025 12:01AM
Thumbs Up

I had an accident with a kiter last month. Here is my quick fix: Epoxy injection with a syringe. Board back on water the next afternoon. I didn't bother fixing up the 30cm harness hook mark, so has a story to tell now.





Mark _australia
WA, 23433 posts
Saturday , 13 Dec 2025 8:20PM
Thumbs Up

Yes it works but not without considering heat. can melt the core

prob better off with UV cure resin to fill, then sand n glass. Still back on water next day

jn1
SA, 2627 posts
Sunday , 14 Dec 2025 10:17AM
Thumbs Up

Yes agree. One has to be very careful and very sure they know what they're doing (and confirm this by testing to get to know the product).

Thanks for tip with the UV resin.

DI7
29 posts
Monday , 15 Dec 2025 12:51AM
Thumbs Up

Or just use very slow epoxy - too keep the temperature of the chemical reaction low enough.



Subscribe
Reply

Forums > Windsurfing General


"Another board repair question" started by onshoreroy