Fiberglass Laminator how-to

How to Mix Resin and Catalyst Correctly

Wrong ratios ruin parts.

Updated By the Career Education Institute Curriculum Team
Quick answer

Wrong ratios ruin parts. In short: check; measure; measure, then complete the remaining steps below.

Step by step

  1. Check temperature.

  2. Measure resin.

  3. Measure catalyst exactly.

  4. Mix thoroughly.

  5. Note the time.

  6. Use within pot life.

Safety reminders for fiberglass laminators

  • Wear respirators
  • Ventilate
  • Wear gloves and long sleeves
  • Store resin safely

Gel coat · Resin · Catalyst · Chopped strand mat · Woven roving · Wet-out: see the full fiberglass laminator glossary.

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