Gelcoat Quality Guide A guide to application faults and possible causes Over 50 years of reliability, experience and innovation

SCOTT BADER COLOUR TEARING • Pigment separated from resin • Improper spray technique • Long geltime, sagging COLOUR SEPARATION • Insufficient mixing • Sagging, drainage • Poor gelcoat application COLOUR MOTTLING • Gelcoat loow in thixotropy • Poor pigment compatibility PARALLEL CRACKS • Flex cracking • Gelcoattoo thick STAR CRACKING • Reverse impact • Gelcoattoo thick • Crack pattern transferred from mould • Chemical attack • Excessive heat • Water ingress • Damp reinforcement GELCOAT BLISTERS • Unreacted catalyst • Solvent contamination FIBRE PATTERN • Gelcoattoo thin • High exotherm in laminate...

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