Fiberglass Supply Fiberglass Supply Marine Epoxy Resin — Mix Ratio & Calculator
Data sourced from manufacturer SDS & TDS · Last verified September 01, 2026
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Quick Answer
Fiberglass Supply Fiberglass Supply Marine Epoxy Resin mix ratio: 2:1 by volume, 2:0.92 by weight
Max pour depth: 0.5" · Full cure: 12h · Ideal temp: 75°F · Price: $70–$140/gal
⚠️ Exothermic Risk — The weight ratio (2:0.92) is NOT 1:1. Resin and hardener have different densities. Using a 1:1 scale ratio will result in incorrect curing. Always mix by weight using the ratio above.
Marine-grade epoxy for fiberglass boat repair and composite layup. Low viscosity for excellent cloth wet-out. Compatible with fiberglass, carbon fiber, and Kevlar. Saltwater resistant.
| Volume Mix Ratio (A:B) | 2:1 |
| Weight Mix Ratio (A:B) | 2:0.92 — use this for scale mixing |
| Max Pour Depth | 0.5" / 12mm |
| Ideal Temperature | 75°F |
| Full Cure Time | 12 hours |
| Viscosity | 600 cps |
| Coverage | 16 sq ft/gal |
| Average Price | $70–$140/gal (Marine & Structural market avg, 2026) |
Safety Note
The weight ratio (2:0.92) is NOT 1:1. Resin and hardener have different densities. Using a 1:1 scale ratio will result in incorrect curing. Always mix by weight using the ratio above.
The weight ratio (2:0.92) is NOT 1:1. Resin and hardener have different densities. Using a 1:1 scale ratio will result in incorrect curing. Always mix by weight using the ratio above.