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Regular price $150.98
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Mastic-Lok is a versatile, high build, 100% solid, and VOC compliant mastic epoxy polyamide primer that works even in the harshest of environments. It can be applied on marginally prepared substrates with outstanding adhesion to metal surfaces and most existing coatings. Mastic-Lok withstands severe weather conditions, corrosion, moisture penetration, and highly corrosive environments. This primer wets and penetrates firm rust and tight crevices, resisting further rust deterioration.

Features and Benefits

  • Single coat application
  • Excellent film build on edges
  • Superior chemical resistance
  • Great for maintenance or new construction projects
  • Extended re-coat windows
  • V.O.C. compliant in all districts nation-wide



What It Is: A Mastic Epoxy Polyamide Primer

Surface Types: Concrete, Steel (see TDS for full list)

Formulation: Epoxy Polyamide

Coverage Rate: Approx. 401-534 sq. ft. / gallon (See TDS for details)

What comes in a kit?

1 Gal Kit:

Part A - 85.33 FL. OZ. (3.66 Liters)

Part B - 42.67 FL. OZ. (1.25 Liters)

2 Gal Kit:

Part A - 170.7 FL.OZ. (5.04 Liters)

Part B - 85.33 FL. OZ. (3.66 Liters)


Mastic-Lok should always be coated with an opaque (not clear) topcoat such as:

Polyurethane HD

FluoroPoly HD

AcrylicPoly HD

AcrylicPoly DTM2

VandlGuard IsoFree®

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More Details

How To Apply

Brush, Roll, or Spray on easily in a:

Wet Film Thickness (WFT) – 3 to 4 mils

Dry Film Thickness (DFT) – 3 to 4 mils

Minimal Surface Preparation

Superior performance over minimal surface preparation of steel substrates.

Protects Surfaces From Corrosion

Mastic-Lok blocks out all water access to steel and prevents numerous types of corrosion including dissimilar metal corrosion.

Safe For The Applicator, End-User, and Environment

Contains <10 g/L V.O.C.’s, no carcinogens, very low odor and can be applied on interior and exterior surfaces.