Join Date: Sep 2007
Location: North Florida
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Re: Blister repair prep
While I respect your opinion, I don't happen to agree with you in everything you've said.
Think about the chemistry and physics for a moment. The hydrolyzed resin is mildly acidic. Left alone, it will continue to hydrolyze increasing amounts of cured resin. This is akin to a very slowly growing cancerous tumor within your body.
When filling opened up blisters, almost everyone recommends using epoxy. Epoxy is not water permeable. The schedule is a wet-out with epoxy, followed by applications of thickened epoxy. The choice of thickener is also important -- a non-absorbent filler like Cab-o-sil is the way to go. Deeper repairs should include use of cloth (bi-axial is a good choice in many cases.) Once the area is faired, another coat or two of epoxy to seal the repair.
Most solutions for blistering also include application of an epoxy barrier coat, either over the top of the repaired area or better yet, the entire hull.
When done properly, a repair is pretty much impregnable to water.
However, if corners are cut and a few steps ignored, or inferior products are used then you are destined for future work.
Last edited by PorFin; 09-24-2012 at 10:41 AM.