SoCal Jet Boats
Tech Talk => Gelcoat / Paint / Fireberglass Repair => Topic started by: SLCKREG on November 09, 2010, 01:02:06 PM
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I have heard to grind a v grove in the crack and mix resin and cabosil to fill them.....does that really work? It looks like on most of mine it would be just as easy to grind the whole spot down and throw some cloth on them. Do you think a single layer of cloth is adaquate? Also I have read to drill a small whole where the crack terminates to keep it from growing.......should I do this too? Do you drill all the way through the glass...or is the idea to just drill half way through ,or??? I will try to put up a pic or 2 of what I am fixing. Also.....other that the flame itself...is propane heat a bad idea when doing glass....its only mid 40's here this week. I worry about all the humidity assocated with propane heaters.
(https://www.socaljetboats.com/proxy.php?request=http%3A%2F%2Fi578.photobucket.com%2Falbums%2Fss230%2FH20MOFO%2FMobile%2520Uploads%2F1108001923.jpg%3Ft%3D1289336798&hash=2aa017c49a717f1e84c8efe651da2de48fdc59b4)
(https://www.socaljetboats.com/proxy.php?request=http%3A%2F%2Fi578.photobucket.com%2Falbums%2Fss230%2FH20MOFO%2FMobile%2520Uploads%2F1108001849.jpg%3Ft%3D1289336982&hash=6f55f0fcec5125a570bc9267d6a04deddc327d82)
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grind all dead glass (cracks) out then lay in your cloth or matt depending on how deep you go.
that big spider crack will/should end up about a foot around
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+1 on what Ralph said. Also you will probably need more than one layer of cloth to properly fix the crack. I personally would grind it deep enough to get at least one layer of mat and a finish layer of cloth preferably either deck cloth or a 5-6 oz cloth. As far as the Propane heat is concerned I would stay away from it, If you are using epoxy resin a fast hardener is more than sufficient for the temp range. I have been using the epoxy resin from Tap Plastics and am very pleased with the results I have been get
http://www.tapplastics.com/shop/product.php?pid=27& (http://www.tapplastics.com/shop/product.php?pid=27&) for the resin.
http://www.tapplastics.com/shop/category.php?bid=6& (http://www.tapplastics.com/shop/category.php?bid=6&) for the glass
RC
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Kreg,
Where is that big one on the sponson ? Mine has one (not as bad) in roughly that area too. It starts right where the sponson blends into the raised area of the deck (at the back corner/point of the sunken area). I noticed on mine theres a bulkhead right under it, is that where your is ?
Did you check the inside walls of the sponsons ? Up front between the forks, below the rub rail, mine has lots of spider cracks there.
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another valid point^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
if there is a bulk head under that stress crack ??? it will come back until you fix the bulk head.
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Thanks guys...the one pic is right on the tip of the sponson. I assume from ramming the dock....both sponsons have been repaired prior to me owning the boat. The other small one is right where a gunnell support is...and it supports the passanger seat if that makes sense. I have a few directly on top of the bulk heads...my boat has 2 bulkheads. #1 I don't know how to fix them(bulkheads) #2 getting to the bulk head in the nose of those sponsons isn't fun. Are the bulkheads just to tight...not tabbed properly? I just figured it was part of the aging process....and to be somewhat expected. What am I looking for there?????? BTW thanks for the help guys.
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any part of the bulk head (wood) that is touching the hull will cause cracks.