Author Topic: Filling a gouge in SUP-help needed  (Read 221 times)


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Filling a gouge in SUP-help needed
« on: March 02, 2021, 03:39:11 PM »
Newbie doing a repair since I don't live near any surf shops. So i have a few quick questions....

1. How do I know if my SUP is poly or epoxy? The foam looks like smallish size foam balls stuck together?

2. The foam dented in and cracked in a few spots under my heel so I had to dig out some of the foam (about fist size)...What is the strongest (all my weight is resting here) and easiest fill material to add before glassing? Q-cell, microballoons or glueing in a new foam peice? I'm not as concerned about adding weight as this board is likely moving on after repair.

3. Lastly, what is ratio of Q-cell or microballoons to resin if going that method?

Thanks in Advance!!!
« Last Edit: March 02, 2021, 03:41:33 PM by AshevilleSUP »


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Re: Filling a gouge in SUP-help needed
« Reply #1 on: March 02, 2021, 03:54:26 PM »
Posting a pic will get you the most helpful responses, can't really tell from your description what it is, but almost certainly it's epoxy.  What brand is it?

Gluing in a new foam piece with gorilla glue is preferable and easiest.  Mist the GG so it foams out well and then sand to shape.  You asked your question about which is strongest and I'd say it doesn't make a difference.  Strength will be in the glassing.

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Re: Filling a gouge in SUP-help needed
« Reply #2 on: March 02, 2021, 08:55:21 PM »
Thatís EPS Iím 99% sure. You can get it anywhere including packaging or buy it at Home Depot. (Heíll cut up a cheap cooler.)

Donít fill anything of any size or depth with Q-cell if you can avoid it. Cut a piece of foam as was said. Itís also simpler and way faster. If you put too much resin in one spot at once it can melt your EPS. I feel you doubt this leave a paper cup with a couple of ounces of epoxy resin sitting for 15 min and see how that ends up.

Most mix q-cell to mayonnaise consistency, thicker is lighter of course. If itís runny itíll soak into the foam.


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Re: Filling a gouge in SUP-help needed
« Reply #3 on: Today at 01:07:37 AM »
Here's a couple videos that helped me change my methods for filling foam holes, and gouges...

The great thing about making foam this way, is that it's stronger than the 1 or 1.5 lb EPS foam in your board as Beasho calculated as roughly equivalent to 4 lb foam in the second video. Also, its expansion as exhibited in the first clip allows it to find all of the little voids that Q-cell or microballons won't reach for better adhesion.

I've used it multiple times now, and once it cures (less than 30 minutes usually), it's easily cut, sanded, and shaped to the contour of your board, and you don't have to fiddle with trying to cut a piece of foam to fit properly, and then using the Gorilla Glue to affix it to the hole anyway. Also, if you didn't mix enough to fill it completely the first time...just mix some more, dump it in, and you're good to go.

Great stuff, and thanks to Beasho for being the first to bring it to my attention.

Edit: Since I'm assuming you have a good portion of the pad off now, if you're looking for "the strongest" fix in the standing area, you might consider removing more pad, and laying several layers of carbon over the glass where you'll be standing.

Had that done on all my EPS boards, and never had foot indentations in them like I did in previous boards w/o the carbon standing area.

This is one of my first foil boards with the carbon in the standing area for example...I paddle my foil boards in the surf stance, and why they're front and back instead of side-by-side.

« Last Edit: Today at 01:24:35 AM by Califoilia »
Me: 6'1"/185...5'7" Kings Foil Board...Bob Pearson "Laird Noserider"...9'6" Costa Azul Wide Body...14' Lahui Kai "Manta"...8'0" WaveStorm for when proning urges still hit.


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