AP-1100 Rust Inhibitive Primer

Product Fast Facts
Blocks Rust
Environmentally Safe


United Asphalt‘s Armour Proof AP-1100 Rust Inhibitive Primer is a water-based rust inhibiting primer designed to be used on corroded metal substrates. This environmentally safe product can be applied as a primer coat for a variety of Armour Proof roof coatings. Armour Proof AP-1100 Rust Inhibitive Primer can be applied to a wide range of other substrates, including wood, concrete, masonry, various single-ply membranes, spray polyurethane foam and roof coatings. AP-1100 has excellent resistance to heat, cold, moisture and weathering. This gray primer also sets up quickly to allow the base coat of the desired elastomeric to be applied soon after application.

Coverage and Drying Time

Apply AP-1100 at a rate of 100-200 square feet per gallon, according to the substrate and condition. Normal drying time is 2-3 hours, re-coat in 4 hours.

Application Information
Required PSI Spray Rate Gal/Min Coverage Rate Gal/100Sq.Ft. Tip Size
2000 2 .5 – 1 .015 – .021


Apply by brush, medium nap roller or airless sprayer.
Airless spray: Minimum pump pressure 2000 psi
Tip Size: .015″ – .021”

Suitable Roof Substrates Use as part of a System
Metal BUR Modified EPDM TPO PVC Concrete Masonry Stucco EIFS

Preparation of Substrate

Surface must be pressure washed clean, free of all loose particles, dirt debris and other contaminants that could inhibit adhesion. Wire brushing may be recommended in addition to pressure washing the surface. Refer to the Armour Proof Coatings Specification for detailed instructions on how to prepare the specific substrate.

Limitations and Precautions

AP-1100 is a water-based primer and is not freeze-thaw stable. Do not apply AP-1100 when ambient air and substrate temperatures fall below 45°F, or if inclement weather is forecasted. Do not apply if ambient temperature will drop below 32°F or dew will settle before coating is allowed to dry. Do not store sealed containers in prolonged sunlight. PROTECT FROM FREEZING DURING SHIPMENT AND STORAGE. Do not store material at temperatures below 45°F. It will freeze and become unusable at temperatures below 32°F.

Available Colors for AP-1100 Rust Inhibitive Primer