Quantum 45 Epoxy Primer Activator
Quantum Quantum
  • Quantum 45 Epoxy Primer Activator

Quantum 45 Epoxy Primer Activator

Quantum 45 Epoxy Primer Activator is the standard converter for the two-part Quantum 45 epoxy primer system that provides exceptional filling, excellent adhesion, and superior corrosion protection for wood and fiberglass/gelcoat surfaces.

It's part of the Quantum high solids, repairable marine finish system, and recommended for use with Quantum polyurethane topcoats to ensure maximum topcoat adhesion and gloss.

Available in quart and gallon sizes, mix this activator with Quantum 45 primer base (sold separately) to create a durable epoxy surfacing primer suitable for surfaces in good condition.

Note: For surfaces that have gouges and other serious defects, consider Quantum HB high build activator instead.

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$56.00 / qt
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Tech Spec Product Info User Generated Content
Mix with Quantum 45 epoxy primer base to create Quantum 45 epoxy surfacing primer, a two-part epoxy-polyamide system. In subsequent coats, apply up to 12 total wet mils, waiting 1-3 hours between coats.

Under normal conditions, when you are starting with a relatively smooth wood or fiberglass surface, two coats of Quantum45 Epoxy Surfacing Primer are sufficient before applying Quantum 99 Polyurethane Topcoat. Please refer to the Quantum System Product Selection Guide for complete product details.

Warning: Do not apply paint materials to surfaces less than 5°F above dew point, or to surfaces warmer than 125°F. Substrate (application surface) temperature should be minimum 45°F to maximum 125°F.


  • VOC (Activator): 2.12 LBS/GAL
  • VOC (Admixed): <420 G/L (3.5 LBS/GAL)
  • Volume Solids (Admixed): 51 +/- 2%
  • Coverage @ 1 mil (no loss): 800-850 FT2/GAL
  • Dry to Sand (1 Coat Application 3-4 wet mils): 4 Hours
  • Dry to Sand (Multiple Coats >4 mils): 16 Hours @ 72°F
  • Full Cure: 72 Hours @ 72°F
  • Mix Ratio: 1 Part Quantum45 Epoxy Surfacing Primer Base to 1 Part Quantum45 Epoxy Primer Activator
  • Induction Period: 30 minutes, prior to reduction and application.
  • To decrease cure times in cooler temperatures, add Quantum45 Cold Cure Epoxy Primer Accelerator. Add up to 6 oz./mixed gallon, 1 oz. for every 5°F below 75°F.
  • Although reduction is not normally recommended, a 10-20% reduction by volume of the admixed primer with Quantum45 Epoxy Primer Reducer may be used for desired appearance and film thickness.
  • Please refer to the Quantum45 Epoxy Surfacing Primer How To guide (at left) for complete mixing and application instructions.


BRAND: Quantum
Number Of Parts: Two Part
Type: Converters
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