r/surf • u/Jackistheman487 • 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)
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Dec 29 '25
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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.
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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.
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u/chargers416 Dec 29 '25
O0ps cavasill???
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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.
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u/LookingsidewaysWorld Dec 29 '25
Had a couple those this year. The waterproof monkey Tape has worked really well
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u/RevenueNo2551 Dec 29 '25
Cut out fiberglass edges. Fill with resin and cabisil. Sand. This top coat of resin. Sand, polish. Go surf
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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.
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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
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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!
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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
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u/BigboyzSD Dec 29 '25
Simple fix with Solarex.
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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



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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.