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Old 03 May 2009, 19:44   #1
oti
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Hypalon has seperated from the core fabric

I salvaged a HB100 Achilles 1992. The fiberglass is fine but the hypalon tubes are to say the least in bad shape. The tender has been in the water a longtime, possibly since Hurricane Ike last Sept. The Hypalon has seperated from the core fabric and it would appear the core fabric has pulled away from the inner neoprene in several spots where there are pin sized holes.

Does anyone know if I should remove the loose Hypalon and apply a synthetic rubber coating? And should I cut away at the core fabric to patch the neoprene?

Thanks
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Old 04 May 2009, 15:43   #2
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And should I cut away at the core fabric to patch the neoprene?
No. The fabric is what provides dimensional stability to the fabric.

I would say the tubes (or at least the fabric in the damaged areas) are toast.

jky
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Old 04 May 2009, 16:26   #3
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No. The fabric is what provides dimensional stability to the fabric.

I would say the tubes (or at least the fabric in the damaged areas) are toast.

jky
Not quite true. Delaminated hypalon can be glued back together with the correct adhesive. The delam. problem is usually as a result of ingress of water under pressure. bet the problem is near the rear /cone of the tubes. The fix is easy but takes some detailed work and the offending fabric edges sealed off with LT Sikaflex.
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Old 05 May 2009, 12:00   #4
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I stand corrected, then.

However, given the apparent scope of the OP's problem (delam of inside and outside fabric coatings), I'd say replace the material, either by rebuilding the existing tubes or retubing.

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Old 05 May 2009, 15:01   #5
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I stand corrected, then.

However, given the apparent scope of the OP's problem (delam of inside and outside fabric coatings), I'd say replace the material, either by rebuilding the existing tubes or retubing.

jky
Idealy yes. It all depends on the size of the damaged area. Mine was about 9 inches on each cone seam. If I had access to proffesional repair services I would have had a large patch glued over the offending areas. I do not so I did it the hard way. As it was below the waterline I finished off with Pettit inflatable anti fouling which sealed everything off from water. So far so good.
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Old 15 May 2009, 16:55   #6
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Can you give details of the LT Sikaflex? Which product should I buy.

I seem to having the same problem with my RIB. I have a blister on one of the cones in the rear, and another near the rear of the tube on the bottom.

I also have litt;e threads hanging all over making the rib look messy. what can be done about these?
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Old 15 May 2009, 17:47   #7
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The product is: Sikaflex-291LOT. The LOT stand for Long open Tack. This enables you to use a pallet knife/spatular ( water wetted) to achieve a smooth finish. The down side is that it takes at least 4 days to cure. Remove the hairy bits with a BIC cigarette lighter carefully. They will curl up and fall off.
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Old 15 May 2009, 19:36   #8
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The product is: Sikaflex-291LOT. The LOT stand for Long open Tack. This enables you to use a pallet knife/spatular ( water wetted) to achieve a smooth finish. The down side is that it takes at least 4 days to cure. Remove the hairy bits with a BIC cigarette lighter carefully. They will curl up and fall off.
T.
Are you using this instead of hypalon glue? Can you describe the process you used a bit more. I have got to get this rib into shape for the season forthwith.
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Old 15 May 2009, 22:38   #9
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Are you using this instead of hypalon glue? Can you describe the process you used a bit more. I have got to get this rib into shape for the season forthwith.
No, you still need to peel back any open seams and glue back. Rough up all surfaces with 80 grit sand paper. Lightly wipe down with Toluene (Ace hardware or paint shop). Follow instructions for the glue you are using. Do not rush, take it slow and do a thorough job. Allow the glue to set up for at least 24 hours so it can out gas and cure. Use the Sika to seal of the fabric edges to stop further delam. Rough up, toluene etc. at least 1 inch both sides of the fabric edge. Apply Sika with spatula/pallet knife. Do not worry about any hanging bits/ runs etc. Trim them off with a pair of nail clippers after it has cured. Antifoul with Pettit if you so choose.
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Old 17 May 2009, 07:51   #10
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once the tubes start to delaminate you are only ever gonna waste time trying to repir them unless the area is particularly small and the reat of the matrial is fine.

Can yo post some photos
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