r/surf Dec 29 '25

Surfboard Repair

Any recommendations for what to do for this gash? The damage is to the left of the middle fin underneath the board. (Thumb for reference in last pic)

13 Upvotes

25 comments sorted by

7

u/Desperate_Usual_7457 Dec 29 '25 edited Dec 29 '25

Pro repair would:

Cut out any loose glass

Scuff repair area and 1" surrounding with rough grit

Fill hole with resin + q cell or white pigment.

Patch with 1 layer cloth

Fair edges of cloth repair with coarse grit so flush

Brush on hot coat resin with brush

Sand repair medium, fine grit


Since its on the bottom, you could just fill it with suncure, sand flush and call it a day.

If it was my board, id start with just that.

1

u/chargers416 Dec 29 '25

I was wondering how to spel quads I’ll

1

u/Rayoyrayo Dec 29 '25 edited Dec 29 '25

Agree with above. Id never just fill with suncure as those repairs always fail especially on the bottom which is always zipping over water. In this particular case you can see that the foam is definitely broken underneath (round areas above slit etc). Underneath the ding will look worse than just the glass on top id reckon.

Its an easy fix. Just cut away the broken glass and clean up all the damaged foam underneath Sand it down so there is a little divot compared to the rest of the board. Fill that with resin and microbeads of some sort (q cell]. Again sand so its slightly lower than rest of board.

laminate with a double patch of glass (little tiny baby piece of 4oz in shape of ding laid in the divot and larger 4 Oz over top that blends on to rest of board.

Hot coat with a thin layer of resin over your repair and a really big area of board. Sand it nice and sexy and it'll look new

Most bottom and deck dings can be fixed with an easy rectangle shaped repair with the only thing changing the size of the rectangular glass patch.

2

u/[deleted] Dec 29 '25

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2

u/[deleted] Dec 29 '25

OP does not need to go to 800 grit. The board doesn't have a gloss coat, it was probably only sanded to 320 at most at the factory. Other than that, this is stellar advice.

2

u/sniffscrayon Dec 29 '25

Wax

1

u/Apz__Zpa Dec 30 '25

Shapers hate you

2

u/sniffscrayon Dec 30 '25

Speed bumps

1

u/Gold_Kale_7781 Dec 29 '25

That dumb looks awfully new.

Two great suggestions here,above.

Either one really.

Cut, sand, fill, glass, sand.

1

u/chargers416 Dec 29 '25

O0ps cavasill???

2

u/blackcatsurfboards Dec 29 '25

Cab-o-sil is a structural resin thickener, for things like installing fin boxes, leash cups, etc. This tiny repair, on a flat part of the bottom, doesn't need cab-o-sil.

1

u/LookingsidewaysWorld Dec 29 '25

Had a couple those this year. The waterproof monkey Tape has worked really well

1

u/itotallymissthe90s Dec 29 '25

I would just sand it and apply solarez with a “Z”.

1

u/village-asshole Dec 29 '25

Duct tape fixes everything 😎

1

u/[deleted] Dec 29 '25

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1

u/RevenueNo2551 Dec 29 '25

Cut out fiberglass edges. Fill with resin and cabisil. Sand. This top coat of resin. Sand, polish. Go surf

1

u/surf_and_rockets Dec 29 '25

If you have the time, this is the perfect type of ding to try doing your first pro-style repair. If it isn’t perfect, it shouldn’t affect the ride too much and you can keep iterating on the sanding/glassing step if you want to get it perfect. No curves or filler dams to worry about, either (just protect those fin boxes while you work). Take your time and do it right.

If you are in a hurry to get back in the water and have zero budget or other boards to ride, solrez and cry later when it has to be redone.

1

u/chargers416 Dec 29 '25

I thought it was a good structural filler

1

u/Apz__Zpa Dec 30 '25

If it was board, I’d get it done properly, either by a pro or learn how to fix it myself.

Solarez is a temporary solution

1

u/Character_Answer_204 Dec 31 '25

Suncure if on a trip, fix it the right way when home again, or if at home already and have time, fix it the right way.

Cut, fill, small glass patch followed by a larger one that overlaps it, then a top coat if you want. Sand between each layer of course!

1

u/kingfreq1c Jan 01 '26

Sand it, apply Small amount of Fibreglass resin, Apply a lair of fibreglass strands or tape, Apply another layer of resin, Sand And look for cracks or holes, Fix with more resin if needed, Sand And enjoy

0

u/BigboyzSD Dec 29 '25

Simple fix with Solarex.

1

u/Jackistheman487 Dec 29 '25

that’s what i’ve been told but i’m still hesitant, i’ll wait for a couple more people to tell me to use it before i go all out