NORPOL® SVG (Gelcoat), NORPOL® SVT (Topcoat), NORPOL® SP (Gelcoat filler)

Common issues

• Gelcoat crazing or star-cracking from incorrect film thickness or catalyst ratio
• Color or gloss mismatch between original and repair work from batch variation
• Print-through of the underlying laminate weave pattern
• Blistering (osmosis) in areas in continuous wet service if not intended for below-waterline use
• Poor cure from incorrect catalyst percentage or application at low ambient temperature
• Adhesion failure between filler and substrate from inadequate surface preparation
• UV yellowing of the topcoat over time on exposed surfaces

Inspection checklist

• Visual check for surface crazing, star-cracking, or blistering
• Check color and gloss consistency across original and repaired areas
• Verify cure hardness meets the product's acceptance criteria before further work is applied over a repair
• Tap-test or visual check for delamination at repaired areas
• Check catalyst/hardener batch and shelf-life records used for the repair
• For structural composite repairs, verify laminate thickness/layup at the repair matches the original structural specification

Service intervals

Typical wear limits

Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.

Critical spares

• Matching gelcoat (NORPOL SVG), topcoat (NORPOL SVT), and filler (NORPOL SP) from the same product line for future repairs
• Correct catalyst/hardener grade specified for the product - do not substitute a different type or brand without checking compatibility
• Mold release/prep consumables if used for mold repair work

Safety

• Styrene-based resin systems and peroxide catalysts (commonly MEKP) are flammable, and the catalyst is a strong oxidizer - store separately from resin/gelcoat and never mix in bulk quantities
• Adequate ventilation is required during application due to styrene vapor
• The cure reaction is exothermic - large mixed batches left standing can self-heat and ignite; mix only what can be applied promptly
• Skin and eye protection required per the product safety data sheet

Class survey

For structural FRP repairs, class typically requires a repair procedure/laminate schedule approved in advance (layup, resin type, cure records retained), separate from cosmetic gelcoat/topcoat work which is generally owner's routine maintenance below the survey threshold.