Category Archives: Gelcoat Blister Repair

Triple Threat, 38 years old and counting

A case study in remediating gelcoat blisters

By Bruce Niederer — GBI Technical Advisor

My father, rest his soul, and I bought Triple Threat together sometime in the mid-’80s. We raced our ’81 Pearson Flyer hard together for the next 15 or so years, including 12 Port Huron to Mac races. The purchase date is lost to history, but the details surrounding how many times the boat needed a new bottom—meaning a new epoxy barrier coat—are forever etched in my psyche. It’s all the sanding that accompanies repairing gelcoat blisters that has addled my IPA soaked cranium. One just doesn’t forget those seemingly endless hours of self-imposed torture. Continue reading →

Repairing Individual Gelcoat Blisters

By Tom Pawlak — GBI Technical Advisor

Gelcoat blisters can be a serious problem if left unattended. At some point, your hull may need extensive repair, including gelcoat removal and epoxy barrier coats as described in Gelcoat Blisters: Diagnosis, Repair & Prevention. However, if you have isolated blisters and a manageable number to repair individually, we often recommend that you patch individual blisters and continue to use the boat until you determine the cause and extent of the problem. Continue reading →

Gelcoat Blister Repairs

by C. Joe Parker, Michael D. Arndt & Tim Atkinson — Senior Chemist

In Epoxyworks #3 (Fall 1993), Robert Monroe discussed the idea that polyester is subject to degradation in much the same way as wood is affected by rot. Many cases of blistering are actually much more than a blister directly under the gelcoat. These blisters may be the first sign of laminate degradation. Once this degradation begins, it may be as difficult to stop and just as damaging as rot is in wood. Continue reading →