No Need to Remove Rust First!

POR‑15® Rust Preventive Coating is a high‑performance coating designed to be applied directly over properly prepped rusted or seasoned metal surfaces—no need to remove rust first. It permanently stops rust by sealing and protecting surfaces from moisture and corrosive contaminants.

Unlike ordinary paints that dry through evaporation, POR‑15 cures faster in the presence of moisture. This unique chemistry allows it to bond tightly to porous and rusted surfaces, forming an incredibly durable, non‑porous barrier.

Once cured, POR‑15 becomes exceptionally hard, tough, and flexible, making it one of the most durable anti‑corrosion coatings available today.

Why POR‑15 Works

• Non‑porous coating that seals out water, chemicals, salt, and contaminants
• Exceptional adhesion, even over rust
• Can be painted over once cured
• Moisture‑cured chemistry (dries faster in humid conditions)
• Outstanding resistance to abrasion, impact, and extreme environments

POR‑15 Rust Preventive Coating is ideal for long‑term rust repair and protection, especially where durability and chemical resistance are critical.

Features

• Double the solid content of most paints
• Single‑component coating
• Self‑leveling for a smooth, professional finish
• Compatible with all paint systems
• Tested to over 450°F (232°C)
• Exceeds 2,000 hours salt spray testing
• Hammer‑tough finish
• Repels fuels and oils
• Resistant to most acids and alkalis

Applications

Automotive

• Chassis and frames
• Doors, floors, trunk areas
• Suspension components
• Engines and fuel tanks

Industrial

• Heavy equipment
• Truck components and trailers
• Rebar and steel forms
• Fuel storage tanks
• Storm gates and transformers

Marine

• Decks and bilges
• Hulls and pipes
• Chain lockers and masts

Also excellent for sealing and repairing fiberglass.

Surface Preparation

For best results, use:

• POR‑15 Cleaner Degreaser
• POR‑15 Metal Prep

Proper surface preparation ensures maximum adhesion and performance.

Coverage

• 1 Gallon (3.78 L) covers:
  • 350 sq. ft. / 32.5 m² (single coat on most metals)
• Two coats are recommended for most applications
• Porous surfaces (wood and concrete): expect ~20% less coverage

Structural Strength (ASTM Tests)

• Flexural Strength (ASTM C‑580):
  5,200 psi
• Compressive Strength (ASTM C‑579):
  12,500 psi (verified; not tested to failure)
• Tensile Strength (ASTM C‑307):
  3,200 psi
• Bond Strength to Concrete (ASTM D‑4541):
  Concrete fails before the coating

Abrasion Resistance

ASTM C‑501 Taber Abraser Testing

• 0 loss after 1,000 cycles with 1,000 g abraser
• 0.09 g loss after 10,000 cycles with 1,000 g abraser

Weather & Corrosion Resistance

Weatherometer Testing

• 2,000 hours exposure (equivalent to ~10 years in Rocky Mountain conditions)
• No visible change on test panels

ASTM B‑117 Salt Spray

• New steel: No change after 250 hours
• Rusted steel: No change after 1,000 hours
• Coating thickness: 2 mils

Chemical Resistance

After 200 hours of immersion, no degradation observed in:

• 10% Hydrochloric Acid
• 50% Sulphuric Acid
• 55% Chromate
• 85% Phosphoric Acid
• 10% Sodium Hydroxide
• 98% Methanol

Raw Sewage Test

• Industrial sewage filter housing coated with POR‑15
• After 1 year of service: no rust or undercutting

Impact, Porosity & Temperature

• Impact Resistance: Exceeds MIL‑D‑3134J
• Water Absorption (ASTM C‑413): 0.0001 maximum
• Non‑Porous (NACE TM0174): 0.00 rating
• Temperature Resistance:
  • Continuous exposure up to 450°F
  • No adhesion loss after 10 hours at 450°F

Size Available

Gallon – 3.78 L