They said the SMC resin comes with a hardener and is the perfect match for this hull but also I was told west system epoxy would work just as well. Location: La Florida How much area and thickness do you need to grind out to reach undamaged hull?
Location: Milwaukee, WI I have repaired dozens of them with polyester and it worked fine.
Captain R For a few years i made surflife saving boats and at the end of each season we used to get the boats in for there mantinance checks and repair the bottoms like what you got !!,after some thought i used vinylester resins and fortified the resin for the glass with Fine carborundum powder . In your case the bottom of the hull is black so if you finished with black tooling gel coat and the carborundum mixed in you wouldnt see it hardly !!
Originally Posted by gonzo I have repaired dozens of them with polyester and it worked fine. Location: Milwaukee, WI You can get color sample chips from the paint store and find whatever matches close enough. When making potentially dangerous or financial decisions, always employ and consult appropriate professionals. Location: Souther California I went under the trailer last night and took a good look at it with flash light and it is exactly as you mentioned. Originally Posted by gonzo The photos show that it is just wear from rubbing on the beach. Location: Monroe WA The bond to SMC can be a little tricky at times, the high filler content in SMC is the issue. Don't use tooling gel for much of anything except tooling, it is normally very rigid, so cracking can be an issue, plus it's not designed for outdoor use and typically has poor UV properties. Originally Posted by CaptainReza I went under the trailer last night and took a good look at it with flash light and it is exactly as you mentioned. Location: Monroe WA I haven't used that product, but since it's designed for SMC it should work OK.
With epoxy you don't need to use mat (CSM), with polyester you do, so the repair will be thicker. With polyester, do not use multiple coats of resin alone, polyester is rather weak and brittle when compared to epoxy, the extra unreinforced (no glass) resin will crack easily. I will use one layer of 1.5 oz cloth with epoxy and then if need be a couple of coats of epoxy on top of it. Originally Posted by ondarvr I haven't used that product, but since it's designed for SMC it should work OK.
Location: Souther California So yesterday I drove to westmarine after work.
You have gotten some great advice from people who have done repairs such as yours and in my case much more advanced.


Location: MA I do not think your wasting my time, i am just trying to help. The worst thing you could do is mix the resin wrong and even then it's just a mess you'd have to clean.
Location: Souther California In that case I will wait until tomorrow morning when temp will go back up to mid 70s to do the glass work.
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While polyester will bond to some SMC parts, it may not be the best for all parts, so epoxy is normally recommended.
If you are building up the hull, or just replacing what has been worn away, then either product will work.
The amount of lost glass as it is now, is very insignificant so I will just use one layer of cloth. Picked up 1 qrt Resin 105 and Hardner 206 (slow curing), mini pumps so I don't have to measure, black pigment tube and 403 microfiber filler.


I will do the clean up this evening, will cut the cloth to proper width and length and apply tomorrow morning. Delivery times may vary, especially during peak periods and will depend on when your payment clears - opens in a new window or tab.
Contact the seller- opens in a new window or tab and request a postage method to your location.
Find out more about your rights as a buyer - opens in a new window or tab and exceptions - opens in a new window or tab. You've read and agree to the Global Shipping Programme terms and conditions - opens in a new window or tab. Import charges previously quoted are subject to change if you increase your maximum bid amount. I really like the idea having the paint in epoxy a lot better than spraying it as I have to do the work laying down under the trailer.. I will do section by section so in case I screw up the first time, I won't have to clean my mess length of the hull.
You can tint the epoxy, but don't expect it to weather very well, epoxy and UV rays don't get along all that well.
I hope people don't think I wasted their time as this thread is the only reason I am doing this myself. Honestly it isn't that hard and no matter what you ca ALWAYS fix a mistake in this type of repair. If you reside in an EU member state besides UK, import VAT on this purchase is not recoverable. Import charges previously quoted are subject to change if you increase you maximum bid amount.
The Gentleman saw the pictures and said I really don't need any cloth and all I have to do is seal it. He told me the places that have exposed fiber glass with no paint, I shouldn't even sand, just clean with acetone. We over the years even used combinations of silica sand and carborundum on the flanges of moulds to stop guys from grinding the edged away .




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