Caldera Spas Shell Surface Damage / Osmotic Blistering

Spa shell has visible cracks or blisters (bubbles) in the acrylic surface.

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Age-related acrylic fatigue, Chemical imbalance, Manufacturing defect, Physical impact

Safety: Drain the spa before attempting any shell repair.

Assess severity: Hairline surface cracks that do not leak may be cosmetic. Deeper cracks or blisters that leak require repair.
Temporary patch: For small leaks, use a spa-safe underwater epoxy or acrylic repair kit as a temporary fix.
Professional repair: Significant shell damage often requires professional acrylic repair or shell replacement.

Professional Required 5/5

Acrylic Shell Repair Kit

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