Broken Futures Fin Box Repair

In this video we'll show you how to repair or replace a broken futures fin box on a surfboard or SUP.
Steps are:
- Remove broken fin box and damaged fiberglass from around box
- Fill in damaged area with resin/3m bubble mixture
-Sand damaged area flat and route in hole for new fin box
- Install new fin box with resin
- Glass over new fin box and sand flush with board
- apply final coat of resin and sand flush, buff to gloss if desired
Materials used:
Futures Fin Box
UV Cure Polyester Surfboard Resin
MEKP Catalyst for resin
Surface Agent to make sanding resin
4oz fiberglass Fabric
3M Bubbles
3M 233+ Tape
#2 Surfboard Polish
Styrene
Tools Used:
Trim Router
Futures One Pass Jig (2 pass is better for repairs)
Dremel Tool
Utility Knife
Mixing Buckets and stir sticks
Latex or nitrile gloves
Sanding Block
36,80,220,400,800 grit sand paper
Sander/Grinder/Buffer
Yellow Squeegee
2" Brushes
Surfboard Ruler/Shaping Square

[@Gooseeggedd]

Solid work! Stoked to fix my board now

[@FiberglassSupply]

Thanks!

[@seaduce737]

Excellent video. Lots of good composite repair info! I'm here getting inspiration for fiberglass kayak repair

[@FiberglassSupply]

Cool, thanks. Let us know if you have any questions.

[@TheReverb1]

For your information THIS is the hacker way. I mean; you ALWAYS replace foam with foam. Always the core material should be used to prevent unbalance and better adhesion. I am a surfboard builder since the 80s

[@tra_vis9626]

We’ve come a long way from glassing your busted fin back on w suncure, thanks for technical vid tho!

[@geophphd5594]

Great vid. No need to check angles of the fin?

[@miguelaragao1]

You got it! 😊

[@joeydriskell5563]

Awesome. I just jacked up a future fin box on a board I’m shaping and I was wondering what exact material did you use to make the putty? 3m bubbles, resin, etc..?

[@FiberglassSupply]

We have a video on making the putty:
czcams.com/video/eK1vlG46XAY/video.html
Basically it is resin, 3m Bubbles, and Cabosil. The resin can be a polyester resin or an epoxy depending on what you need.

[@dmac5678]

Few questions. Could I just fill the initial damaged fin area with qcell and resin mix? Also if I only have sanding uv solarez resin would that work? I’m assuming you used lam initially then sanding coat after?

[@VisionEmerald]

👌

[@ThePhantomNetwork]

nice work

[@FiberglassSupply]

Thanks!

[@julf5216]

My mixture I filled in the fin box doesn't get hard. It's still sticky after two days and I can't sand it. Can you guess what the problem might be?

[@FiberglassSupply]

Either mixed off ratio if using epoxy or did not add enough catalyst if using polyester. I am assuming you used 3m bubbles and cabosil for the mixture like in this video: czcams.com/video/eK1vlG46XAY/video.html

[@Cuisinenomade1]

Ifbthe fin box is not broken, can i reuse it? Thanks!

[@FiberglassSupply]

You could, but since a new box is relatively inexpensive I would get a new one. The lip around the opening is raised and designed to get ground flat when you sand it, the existing one will not have that and may be a little more difficult to finish the repair than with a new one.

[@JohnFuller804]

Cool fusion 360 shirt, do you design boards using CAD?

[@FiberglassSupply]

Thanks, I have not designed any surfboards in fusion, I have designed twin tip kiteboards and a foil board in Fusion. The kiteboards I usually design flat and the foil board I did using T-splines.

[@eyalyawets410]

where can I buy a powerbox to replace mine?

[@FiberglassSupply]

www.theshapingshack.com/plastic-power-box-chinook/ This is a link to one of our sites, or shoot an email to [e-mail] and he will hook you up. If you are outside the US please email Jason to get a good shipping quote.

[@beachthor1]

Well now I know why board repair is so expensive

[@jacktoby1907]

A trick : you can watch series at Flixzone. I've been using them for watching a lot of movies during the lockdown.

[@sethjacob797]

@Jack Toby Yea, have been using flixzone for months myself :)