Injecting epoxy - Page 2 - SailNet Community
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post #11 of 21 Old 05-14-2007
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Getting resin in moisture out of composite structure

Hi guy's
I have been resin infusing panels for the past few years and find that a couple of aspects in the vacuum process are of note
1 water boils at 1 atmosphere therefore if trying to rid your core deck, whatever of water prior to injecting resin this may be of help it of course requires a vacuum pump capable of this.
2 in areas that I have infused that have for some reason or other not received there full share or resin (or any ) I am able to drill holes strategically and suck the resin through. Best of course is to supply at lowest point and pull up to highest point.
3 syringes of various sizes are available from horse supply /grain food / vet outlets.
4 When you really want to get a whole bunch of thin bog or slurry into a cavity a zip look bag taped to an end nozzle (from a silicon tube for example )
the nozzle being punched carefully through the bags bottom and taped tight
Then ladle your thin bog or whatever into bag through top, seal as normal without any air then roll bag down towards nozzle works beaut and cheap
Cheers Steve Marshall
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post #12 of 21 Old 05-14-2007
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I bought some syringes a while back at my local drug store. Just ask the phamacist.

I think they were like 25 cents each verses a couple of dollars for them at WM, and you can only use them one time......
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post #13 of 21 Old 05-14-2007
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I am looking for a way to inject epoxy under pressure into a deck core. Everytime this is discussed syringes are mentioned. Is there a machine or other device that can inject the epoxy into the deck core under high pressure so it will fill every part of the void. I have drilled an exploratory below deck hole near a deck mounted block that has let some moisture into the deck over the years. The wet area radiates out about 12 inches from the block. It seems to me that injecting epoxy into the area under pressure is a better solution than cutting open the deck and replacing the core material although every discussion about this seems to recommend the deck mutilation approach. Would appreciate any thoughts about a more creative appoach to this.
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post #14 of 21 Old 05-14-2007
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post #15 of 21 Old 05-14-2007
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System Three epoxies come in a caulk-gun type tube that will mix the resin and hardener as you pump it out...and that would give you considerably more pressure to inject the epoxy into the voids with... but I wouldn't call it high pressure. Dealing with epoxy under high pressure seems that it could cause far more problems than it solves.

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post #16 of 21 Old 05-15-2007
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The trouble with just injecting is that the water is still in there and will be spread further. I guess you could drill a series of holes around the perimeter and hope that the water would be largely forced out by the pressure of the injection. But then we are back to deck mutilation.
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post #17 of 21 Old 06-29-2007
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Another vote for your local feed store over WM. 10% of the price and you have a choice of sizes.
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post #18 of 21 Old 07-02-2007
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I've used a standard grease gun and screwed grease zircs into the area that I wanted to force a large amount of epoxy resin into. I had several large areas that needed to be impregnated with resin without tearing into the hull. We drilled and tapped holes, inserted zircs into several of the lower holes and forced the epoxy in with the grease gun until the epoxy came out of the upper holes. Then we would take the zirks out and quickly drive wooden dowels into the holes. It worked pretty well. The metal grease guns got pretty damn hot when the epoxy started going off. We bought cheap guns and threw them away each time. It wasn't worth the time spent to clean them out.

Sounds goofy but it worked.
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post #19 of 21 Old 07-02-2007
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Acetone displaces water. You must be careful as it is a petroleum distilate and will also get you high or stupid in a confined space.
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Last edited by pigslo; 07-02-2007 at 04:51 PM.
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post #20 of 21 Old 07-02-2007
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Your local pharmacy or hardware store may also have them. In the pharmacy as "irrigation syringes" meant for flushing out wounds with saline solution, no needle on them. Or for really small amounts--in some states you can buy the inexpensive insulin syrignes, with needle, buy the box.
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