Singing the boat bottom blisters blues
"While researching the causes and effects of blisters, I found more than one explanation of the cause and many opinions as to whether they actually damage laminate. The most common explanation of the cause of blisters is that polyester resin (gelcoat) is susceptible to osmosis, and the absorbed water reacts with any solutes remaining in the laminate to create an acidic solution. This solution is under pressure and causes the gelcoat to blister. Certainly, any solution present is acidic, but I'm not certain whether it causes laminate damage."
(Submitted by Noel Thu Aug 5, 2004 )
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