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Products Techniques A-A-2786 Chromate Free Primer

Products Techniques A-A-2786 Chromate Free Primer is a general purpose, rust inhibiting, alkyd primer. It is intended for use over metals that are bare, scuffed, sanded, lightly rusted, abrasive blasted and previously painted surfaces and shows excellent anti corrosion properties. The primer chemically etches into the surface to provide exceptional adhesion and durability. Although this primer is intended for metals, it may be applied to wood, composite and concrete surfaces.

Product Type: Primer

Compatible Substrates & Surfaces: Composites, Concrete, Metal, Wood

Features: Corrosion Resistant, Crack Resistant, General Purpose, Good Adhesion, High Durability

Chemical Family: Alkyds

Technical Data Sheet

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Identification & Functionality

Chemical Family
Product Type

Features & Benefits

Applications & Uses

Compatible Substrates & Surfaces
Cure Method
Surface Preparation Instructions

ALL SURFACES: Remove all dirt, grease, oil, salt and chemical contaminants by washing the surface with PTC2002 or Bizzy-B™ 0 VOC Cleaners/Degreasers or other suitable detergent cleaner/ degreaser. Then rinse thoroughly with water. If you wish to use solvents PTI recommends IPA, Acetone or MEK. Rinse thoroughly with fresh water and allow to fully dry. Remove all remaining dust and debris by lightly wiping the surface with a tack rag or cheese cloth. All surfaces must be dry at time of application.

STEEL: Hand tool (SSPC-SP-2) or power tool (SSPC-SP-3) clean to remove all loose rust, mill scale, and deteriorated previous coatings. Abrasive blasting to a minimum Commercial Grade (SSPC-SP-6, NACE 3) with a 1–2 mil (25–50µ) surface profile is recommended for optimal performance. Abrasive blast cleaned steel requires two coats of primer. Scuff the surface with scotch bright pads.

  • For additional protection apply PTI’s Acid Etch Primer prior to the A-A-2786.
Application

This product can only be applied using an aerosol can per the specification.

  1. Shake the aerosol can, right side up, for a minimum of 60 seconds.
  2. Turn the can upside down and shake.
  3. After the product in shaken thoroughly you may apply by pressing on the spray nozzle.
  4. After every use, turn the can upside down and press the nozzle down until the spray coming out is clear. This means that the nozzle is clear and has a lesser chance of clogging between uses.

NOTE: Application of PTI products requires the use of all OSHA approved safety equipment, including proper ventilation. Additionally, PTI products require the recommended temperature/humidity conditions and film thickness ranges for optimal performance. The material, hangar, and aircraft skin temperatures should be no lower than 75° F / 25° C before, during and after application.

Drying and Curing Schedule

Dry times are based on the dry film thickness between 0.6 - 0.9 mils (25-50 microns).

Air Dry: Allow applied coating to dry for at least 5 minutes before apply a top coat. Primer dries dust free in 5 minutes and dries hard in 15 minutes

Always bring the coating to the “tack free” stage before top coating.

Properties

Color
Typical Properties
ValueUnitsTest Method / Conditions
Coatings VOC254.0g/L
Flexibility (1/8 inch mandrel)No Cracking/Flaking
Lacquer ResistantYes with no defects
Recommended Dry Film Thickness0.6 - 0.9mil
Spray Viscosity (max #4 Ford)14.0seconds
Weight11.19lbs per gallon

Technical Details & Test Data

Chemical Resistance
  • 24hr immersion in distilled water - NO DEFECTS
  • 4hr immersion in hydrocarbon fluid(TT-S-735 TYIII) - NO DEFECTS

Storage & Handling

Shelf Life

Shelf life is only applicable for materials stored in unopened and undamaged original factory filled containers. 1 year when stored between 50°-85° Fahrenheit.