• Chemistry: Pre-promoted unsaturated polyester resin
• Appearance: Amber liquid
• Catalyst: MEKP, 1.0–2.0% by volume (temperature dependent)
• Working time (75–80°F): ~4–7 minutes (batch-size dependent)
• Gel time (75–80°F): ~20–30 minutes at typical catalyst levels
• Sand time: ~2–2.5 hours at 75–80°F
• Full cure: ~6–8 hours at 75–80°F
• Typical mix guide (MEKP):
  • 60–70°F → ~17 cc per quart / ~68 cc per gallon
  • 71–90°F → ~11 cc per quart / ~44 cc per gallon
  • 91°F+ → ~9 cc per quart / ~36 cc per gallon
• Specific gravity: ~1.10–1.15
• Flash point: ~89°F (32°C)
• VOC (as packaged): ~405 g/L
• Packaging: Quart, Gallon, 5-Gallon
• Transport (summary): Flammable liquid; polyester resin kit when sold with MEKP
• Safety notes: Styrene-containing; use gloves, eye protection, and adequate ventilation

Hi-Bond Polyester Resin w Hardener

• Marine-grade polyester resin for hand lay-up, repairs, and general fiberglass work.
• Fast wet-out, low viscosity for efficient laminate build and strong interlaminar bonds.
• Available in laminating (unwaxed) and finishing (waxed) formulas—pick unwaxed for multi-layer layups, waxed for a tack-free final coat.
• Quick turnaround: typically sandable in ~2–2.5 hours; full cure ~6–8 hours at 75–80°F.
• MEKP-catalyzed only with clear, temperature-based dosing guidance on the label.
• Broad reinforcement compatibility: CSM, woven cloth, roving, and biaxials (e.g., 1208/1708).
• Gelcoat friendly: can be gelcoated when “green” or after scuff sanding if fully cured.
• Boat-shop practical: dependable cure in typical yard conditions; designed for fiberglass and properly prepped wood.
• Amber finish that sands clean and fair.
• Shelf life ~12 months when stored cool, sealed, and out of sunlight.