Osmosis (Blisters), Stress (Spider) Cracks
Osmosis and stress cracks are both serious issues, especially if you are experiencing either one of these issues on the hull of your watercraft. If left untreated, osmosis will slowly add more moisture into your hull which will weaken you gelcoat and peel off. In turn, stress cracks will continue to expand until they weaken an entire section of your watercraft. Both are visually unappealing, but more importantly both are significantly damaging to the long-term health of your Boat or PWC.