Osmosis Repair Fraser Fibreglass Ltd. has repaired well over a hundred osmosis damaged boats. We undertake osmosis repairs in one of our two shops where proper temperature and humidity can be regulated. The first step is to peel off the damage material with a gelcoat peeler. Often the blistering is in the underlying laminate which requires more removal than just the gelcoat itself.
Infrared radiation is the most efficient way in drying the laminate.
Proper monitoring with a moisture meter ensures a bone dry laminate which is imperative to successful blister repairs. Depending on the thickness of material removed we then rebuild the hull laminate using epoxy and fabric reinforcement. Final sealing is usually achieved with new technology modified hydro carbon epoxy primers, which are amazingly non hydroscopic. The hull must be faired as original or sometimes racing fairing is required.