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PostPosted: February 8th, 2010, 5:55 pm 
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Location: Bancroft, Ontario Canada
Y-Boat,
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I don't think of glass as a sure fix on Royalex! It is so less flexible that it often cracks and/or pops off eventually too.


Although fiberglass probably isn't needed here, G-Flex as a more flexible epoxy could be used instead.

The page that Fitzy provided describes this in the Understanding Flexible Properties and the G-Flex Overview PDFs... should be worth a try since it's described as having flexibility combined with strength characteristics compatible with plastic.

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PostPosted: February 8th, 2010, 6:34 pm 
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I have heard the G-flex is a much better epoxy for using with Royalex canoes. However, I've also heard that it wasn't available in Canada, and I'm guessing it's not cheap.

Have Canadians used the stuff?

Pat.

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PostPosted: February 8th, 2010, 6:44 pm 
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Location: Merrickville, Ontario, Canada
A quick seach shows a few places in Canada for G/Flex. Here are a couple:

http://ca.binnacle.com/advanced_search_result.php?keywords=g-flex&osCsid=2ue45r9jl1ikkccrqct3nqp461

http://www.thechandleryonline.com//product.asp?pf%5Fid=153%5FM6508&dept%5Fid=1521


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PostPosted: February 8th, 2010, 7:59 pm 
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Jamestown Distributors has it and say they will ship anywhere... 32 oz, almost one liter is $52, with smaller amounts available.


http://www.jamestowndistributors.com/us ... dener+Kits

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PostPosted: February 10th, 2010, 5:32 pm 
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Even using ordinary West 105/205 rather than G-flex, there is no risk that glass will "pop off" a Royalex repair. The 105/205/S-glass patch I applied to the outside of the hull, directly under the pedestal, has taken a ridiculous amount of abuse, including having to ride over a log prior to going over a ledge, and riding over rocks.

I do think that such patches will stick better when directly on the ABS rather than on the overlying vinyl. I don't think there is any reason to use G-flex, which being thicker before hardening, will not wet out glass cloth as easily. If there is any concern that a glass cloth patch might split, because the underlying ABS layer is split, then I recommend using one or two layers of polyester cloth for the initial layers, and then S-glass for stiffness and hardness.

I have never used ABS slurry for repairs. It seems to be excellent for adding thickness to worn-down areas. I have not seen a formal test of whether hardened layers of slurry will result in stiffness and hardness equivalent to an equal thickness of ABS sheet such as is used in Royalex.

Possibly ABS slurry could be used to wet out glass or polyester cloth. But would there be any advantage over West 105/205 resin, which wets out clear and so makes it easier to see that the cloth has been permeated properly?


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PostPosted: February 10th, 2010, 10:51 pm 
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EZ, Maybe there is no risk of your glass repairs coming off, but the average canoeist must either use lower quality epoxies, put it on over the vinyl, or just not be as talented at it - probably all 3, because I've seen a lot of glass not last long.

I tried wetting out cloth with ABS slurry and it didn't work. I'd rather add glass separately over the hardened slurry if need be.

Pat.

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