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Author Topic:   5200 vs Epoxy for Plastic Bonding Repair

Matt F posted 05-25-2009 09:42 AM ET (US)
While replacing the flo-max scuppers that are part of the self-bailing system on my boat – admittedly an Edgewater -- I cracked one of the flanges of the through hull/drain tube. The chip was reasonably clean, so I am thinking of bonding it back together. If so, would you recommend using 5200, West System Epoxy, Gorilla Glue or the type of epoxy that comes out of a two part syringe to make the repair?
If there was any good luck in my misfortune (code for mistake), it is that the tube seems very well bedded/sealed. I do not fear any ingress of water into the hull as a result. This winter I will look to make a more permanent repair and replace the tube.
Many thanks for all the help you guys offer to us Whaler cousins.

Jefecinco posted 05-25-2009 10:22 AM ET (US)
What's the cost of a new one? I'd replace with new if there is any chance a failed repair would allow water to enter the laminate or any foam exposed by the break/crack.
If the flange is only contacting clean gel coat where it is damaged it may be worth repairng with a glue. Epoxy or 5200 seems like overkill.
Butch
Matt F posted 05-25-2009 12:08 PM ET (US)
Attached is a link to a photo of the scupper in question.
http://s725.photobucket.com/albums/ww254/MattF44/?action=view¤t=scupper2.jpg
As you'll see, the previous owner had run into the same issue (lower left) and apparently just calked it in.
Right now, I am leaning toward drilling out the screw hole, filling it with epoxy and then bonding the piece back on with the same and running a bead of 4200 around it all.
This winter I'll put replacing both the drains at the top of the list.
Please let me know if you disagree with this approach. Thank you for any help.
weekendwarrior posted 05-25-2009 02:01 PM ET (US)
Epoxy fun fact (I just had my own first round with epoxy myself). If you use epoxy, unless you have good access to all the surfaces then do it in one shot. When epoxy cures, it gets a waxy film on top, called amine blush, and you have to scrub it off before applying another cote or bonding it to another surface. That said, I am so far very impressed with the west system epoxy. Their instructions and tech help are great, I got fantastic results on my first try using it to waterproof wood.

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Author	Topic: 5200 vs Epoxy for Plastic Bonding Repair
Matt F	posted 05-25-2009 09:42 AM ET (US) While replacing the flo-max scuppers that are part of the self-bailing system on my boat – admittedly an Edgewater -- I cracked one of the flanges of the through hull/drain tube. The chip was reasonably clean, so I am thinking of bonding it back together. If so, would you recommend using 5200, West System Epoxy, Gorilla Glue or the type of epoxy that comes out of a two part syringe to make the repair? If there was any good luck in my misfortune (code for mistake), it is that the tube seems very well bedded/sealed. I do not fear any ingress of water into the hull as a result. This winter I will look to make a more permanent repair and replace the tube. Many thanks for all the help you guys offer to us Whaler cousins.
Jefecinco	posted 05-25-2009 10:22 AM ET (US) What's the cost of a new one? I'd replace with new if there is any chance a failed repair would allow water to enter the laminate or any foam exposed by the break/crack. If the flange is only contacting clean gel coat where it is damaged it may be worth repairng with a glue. Epoxy or 5200 seems like overkill. Butch
Matt F	posted 05-25-2009 12:08 PM ET (US) Attached is a link to a photo of the scupper in question. http://s725.photobucket.com/albums/ww254/MattF44/?action=view¤t=scupper2.jpg As you'll see, the previous owner had run into the same issue (lower left) and apparently just calked it in. Right now, I am leaning toward drilling out the screw hole, filling it with epoxy and then bonding the piece back on with the same and running a bead of 4200 around it all. This winter I'll put replacing both the drains at the top of the list. Please let me know if you disagree with this approach. Thank you for any help.
weekendwarrior	posted 05-25-2009 02:01 PM ET (US) Epoxy fun fact (I just had my own first round with epoxy myself). If you use epoxy, unless you have good access to all the surfaces then do it in one shot. When epoxy cures, it gets a waxy film on top, called amine blush, and you have to scrub it off before applying another cote or bonding it to another surface. That said, I am so far very impressed with the west system epoxy. Their instructions and tech help are great, I got fantastic results on my first try using it to waterproof wood.