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plastic crack sealing
http://www.hobie.com/au/en/forums/viewtopic.php?f=23&t=12695		 Page 1 of 1
Author:  neptunebeach [ Fri Jun 05, 2009 9:29 am ]
Post subject:  plastic crack sealing
My summer camp's Getaway has managed to develop a crack in the interior of the hull's storage compartment, large crack the length of the backside of the bin, approx 10". It is not a structural issue, but needs to be sealed to prevent water from leaking into the rest of the hull in a capsize. What material is appropriate for use on PE (I assume this it is built of the same material as the hull). Someone (a Hobie dealer?) suggested 3M's 5200, but the West Marine catalog says it is not compatible with plastics, but 4000 Polyether (with "some palstics" or "most plasitcs" ) or 101 polysulfide is OK. Another owner suggested West System's G-flex was working well. Any technical advice would be appreciated.

Rick
Author:  mmiller [ Fri Jun 05, 2009 10:17 am ]
Post subject:  Re: plastic crack sealing
The Getaway's outer skin is made of Cross Linked Poly, so these "may" not work the same, but there are a few posts about repairs and accessory mounting on kayaks.

In our kayak forums...

G Flex test: http://www.hobiecat.com/community/viewtopic.php?f=11&t=12550

3M stuff that really seems to work well according to "roadrunner":

3M ScotchWeld DP 8010 and the second is almost the same but with a filler added -- DP 8010NS. 3M can tell you who sells it in your area. Each package runs about $20. It has a 6 month shelf life -- check the date on your product.

Tips on using it:

This is a 10:1 mixing ratio. You don't need the expensive special dispenser or mixer they might try to sell you. Get two different diameter dowels to use as plungers. Pre-mark the dowels to dispense about 1/2 batch at a time. Mix well with a stick.

Prep: medium sand the columns and the base around the columns. Clean everything with alcohol and let it dry.

You'll have about 5 minutes working time (they say 10 -- don't believe it). Have everything figured out and prepped before mixing. Applied with double latex gloved fingers . Apply by feel but keep a mirror to inspect your work. Be in a ventilated or open area. Do a practice run before mixing.
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