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Mastic-Lok AF

Mastic-Lok AF


Regular price $150.98
Regular price Sale price $150.98
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Mastic-Lok AF is a versatile, high build, 100% solid, and VOC compliant mastic epoxy polyamide primer with aluminum flake 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 AF withstands severe weather conditions, corrosion, moisture penetration, and highly corrosive environments. This primer can be used to refinish aluminum before adding a topcoat, and wets and penetrates firm rust and tight crevices. It will resist further rust deterioration even in the most extreme corrosive environments due to the aluminum flake.

Features and Benefits

  • Single coat application
  • Creates a virtually impenetrable corrosion barrier
  • 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 nationwide


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 AF 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.