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loghomebuilder
Joined: 16 Nov 2016 Posts: 3
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Posted: Fri Sep 23, 2016 6:19 pm Post subject: Deck soft spot repair with gorilla glue |
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Hi, Any tips on repairing a large soft area in front of the rear strap (where I put my foot when gybing)? Actually for next time since I already attempted a repair as follows: drilled 4 holes in soft area ~3" spacing. Poured a little water into holes. Immediately put in as much gorilla glue as possible. Flexed deck continously to suck in more glue. When dry, cut excess and dabbed with silicone caulk to seal. The deck is really hard now. I'm thinking next time I'll drill 2 holes at a time, fill one with glue and plug it with a screw so glue is forced to expand further under the deck. The 2nd hole serves to release pressure. This board is an old Naish Supercross, not worth professional repair |
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isobars
Joined: 12 Dec 1999 Posts: 20946
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U2U2U2
Joined: 06 Jul 2001 Posts: 5467 Location: Shipsterns Bluff, Tasmania. Colorado
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Posted: Fri Sep 23, 2016 7:19 pm Post subject: |
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I have a similar project ongoing. I removed the soft area, and some of the PVC,I filled with pour foam 8lb. I sanded that area deep enough to add the layers, Kevlar,fiberglass 6oz, carbon, core cell, finished with fiberglass.
WestStstems 105 epoxy.
Since I have these on hand my time is only involved.
On this particular board I have heard of several that develope a soft spot in this area. _________________ K4 fins
4Boards....May the fours be with you
http://www.k4fins.com/fins.html
http://4boards.co.uk/ |
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bred2shred
Joined: 02 May 2000 Posts: 989 Location: Jersey Shore
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Posted: Sat Sep 24, 2016 2:41 pm Post subject: |
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Did a similar repair to U2 on a Mistral Syncro several years ago when the foam core between the straps and under the heels essentially disintegrated. I routed out all the bad foam and then filled with high density polyurethane expanding foam (check out uscomposites.com), sanded smooth and covered over with a few layers of glass/epoxy and then re-installed the deck pads. The 8LB foam is extremely hard once cured. There is a bit of a weight penalty, but at the back of the board it is virtually imperceptible.
sm |
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boardsurfr
Joined: 23 Aug 2001 Posts: 1266
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Posted: Sat Sep 24, 2016 5:03 pm Post subject: |
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I'm just dealing with a soft spot repair at the rear foot strap. Initially, I saw two indentations on the deck, maybe from stones when the board was laying upside down. Opened it up today, and had a hard time finding any fiberglas. It's visible close to the pads (probably the end of the reinforcement), but did not seem like 2 layers where it was soft. The foam underneath is quite soft.
The question is if I should just glass it over, or dig deeper to remove the soft foam and rebuild with polyurethane foam first. I'll probably put a lot of pressure on the same area again since my heels are often off the foot pads, near the rails. |
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U2U2U2
Joined: 06 Jul 2001 Posts: 5467 Location: Shipsterns Bluff, Tasmania. Colorado
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Posted: Sat Sep 24, 2016 5:26 pm Post subject: |
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bred2shred wrote: | Did a similar repair to U2 on a Mistral Syncro several years ago when the foam core between the straps and under the heels essentially disintegrated. I routed out all the bad foam and then filled with high density polyurethane expanding foam (check out uscomposites.com), sanded smooth and covered over with a few layers of glass/epoxy and then re-installed the deck pads. The 8LB foam is extremely hard once cured. There is a bit of a weight penalty, but at the back of the board it is virtually imperceptible.
sm |
You will probably laugh, this is just sitting in my mess/ storage.
The pour foam is the yellow bits, on the left side white is PVC of the weight normally used when making a full sandwich probably 1 lb maybe a little higher, the right side white is PVC but 2lbs.
The Pour foam is 1.65 oz
1 lb. is 1.45oz
2 lb is 2.90 oz.
due to the difference in sizes the pour foam would approx double.5 to make the same area..so 4.1oz
Very unscientific , but shows to go you. _________________ K4 fins
4Boards....May the fours be with you
http://www.k4fins.com/fins.html
http://4boards.co.uk/
Last edited by U2U2U2 on Sat Sep 24, 2016 5:50 pm; edited 1 time in total |
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U2U2U2
Joined: 06 Jul 2001 Posts: 5467 Location: Shipsterns Bluff, Tasmania. Colorado
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Posted: Sat Sep 24, 2016 5:32 pm Post subject: |
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boardsurfr wrote: | I'm just dealing with a soft spot repair at the rear foot strap. Initially, I saw two indentations on the deck, maybe from stones when the board was laying upside down. Opened it up today, and had a hard time finding any fiberglas. It's visible close to the pads (probably the end of the reinforcement), but did not seem like 2 layers where it was soft. The foam underneath is quite soft.
The question is if I should just glass it over, or dig deeper to remove the soft foam and rebuild with polyurethane foam first. I'll probably put a lot of pressure on the same area again since my heels are often off the foot pads, near the rails. |
Since you are doing this..must be worthwhile to so .
I would dig probably the entire are to the underside of the board, fill the cavity with pour foam. My preference would then be carbon, and 2 layers of about 6oz Glass, e glass or if available S glass. You will sand away 1 later .
A even more bomb proof version would be core cell, Airex or diviy cell, on top the foam, then the layers of glass , carbon first if desired. _________________ K4 fins
4Boards....May the fours be with you
http://www.k4fins.com/fins.html
http://4boards.co.uk/ |
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swchandler
Joined: 08 Nov 1993 Posts: 10588
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Posted: Sat Sep 24, 2016 6:53 pm Post subject: |
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http://www.boardlady.com/softdeck.htm
Eva's prescription for the repair. No doubt, a bit of work, especially if you're leaking water from the area. Moreover, you'll need all of the pro tools (a good grinding tool, to include a vacuum pump) to pull it off.
Although not recommended for serious damage, I had a couple of my Mike's Lab boards epoxy injected (Mike did the work) with fairly decent results. One board needed a second injection a few years later.
I should point out that there was never any break in the composite structure on either of the two boards. Also, I was just trying to get a bit more time out of these boards, so I never viewed it as a proper fix. That said, on the latter board with the two injections has still been going 8 years later after the last injection. The board will be 17 years old in late December. |
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U2U2U2
Joined: 06 Jul 2001 Posts: 5467 Location: Shipsterns Bluff, Tasmania. Colorado
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Posted: Sun Sep 25, 2016 8:44 am Post subject: |
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swchandler wrote: | http://www.boardlady.com/softdeck.htm
Eva's prescription for the repair. No doubt, a bit of work, especially if you're leaking water from the area. Moreover, you'll need all of the pro tools (a good grinding tool, to include a vacuum pump) to pull it off.
Although not recommended for serious damage, I had a couple of my Mike's Lab boards epoxy injected (Mike did the work) with fairly decent results. One board needed a second injection a few years later.
I should point out that there was never any break in the composite structure on either of the two boards. Also, I was just trying to get a bit more time out of these boards, so I never viewed it as a proper fix. That said, on the latter board with the two injections has still been going 8 years later after the last injection. The board will be 17 years old in late December. |
You can do it all without a vacuume pump. Doing a larger area, with more epoxy it's a way better finish and is stronger. Doing smaller areas, I use a plastic type bag over all the expoxy and material, then weight it down with a bag that has weight, like cat litter, sand, pellets, put a few 10/15 lb weights on top.
The vacuume is great. _________________ K4 fins
4Boards....May the fours be with you
http://www.k4fins.com/fins.html
http://4boards.co.uk/ |
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isobars
Joined: 12 Dec 1999 Posts: 20946
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Posted: Sun Sep 25, 2016 11:32 am Post subject: |
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bred2shred wrote: | Did a similar repair to U2 on a Mistral Syncro |
Is this common w/Syncros (it was on the Flows)? I just picked up an absolutely cherry 92L '06 for peanuts, LOVE its very plush ride and marvelous slashing & jibing, and want to keep it looking and sailing like new. Sounds like padding the deck between the straps might be good insurance.
Mike \m/ |
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