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Purchase this POR-15 Quart Special of POR-15 Rust Preventive Coating and save over the individual prices.

The ultimate rust preventive system for permanent corrosion protection. Purchase this POR-15 Quart Special of POR-15 Rust Preventive Coating and save over the individual prices.

For best results always clean and prep metal before using the Rust Preventive Under Coating. The components of the 3-Step Stop Rust SystemA topcoat is required if exposed to UV light. Black and Gray Rust Preventive Coatings are non-conductive and good for EV conversion applications.

Step 1 POR-15 Cleaner Degreaser

Step 1: POR-15 Cleaner Degreaser (Formerly Marine Clean) removes grease, oil, dirt, and grime in one application without leaving residues, noxious fumes, or flammable solvents.

Step 2 POR-15 Metal Prep

Step 2: POR-15 Metal Prep (Formerly Prep & Ready) provides the best adhesion for POR-15 Rust Preventive Coating on any metal surface, including shiny polished metal surfaces.

Step 2 POR-15 Rust Preventive Coating

Step 3: POR-15 Rust Preventive Coating is a high-tech, high-performance rust preventive coating designed for application directly on stable rust or seasoned metal surfaces. Provides permanent rust protection with a hammer-tough finish resistant to acids, alkalis, oils, fertilizers, and repels all fuels.

Step-by-step Restoration

Before Image of a Rusty truck bed

Before: Heavily rusted diamond-plate pickup truck beds can be a problem, fix them permanently with the POR-15 3-Step System.

Step 1

Step 1: Clean it! Remove loose rust and degrease the surface with a water-based Cleaner Degreaser

Step 2

Step 2: Prep it! Neutralize rust and etch with Metal Prep.

Step 3

Step 3: Coat it! After thorough washing and drying, coat with POR-15 Rust Preventive Coating, right onto the rust!

Top Coat for UV protection

For areas exposed to U.V. light: Topcoat with Top Coat, 2K Urethane, or other paint of your choice.


After: Now you have a PERMANENTLY repaired truck bed, that won't rust again.

POR-15 Rust Preventive Coverage

• Pint 25 sq ft with two coats
• Quart 50 sq ft with two coats
• Gallon 200 sq ft with two coats

POR-15 Rust Preventive Testing Results

Structural Strength Measures

ASTM C-580 Flexural Strength - measures flexural strength and modulus of elasticity. 5,200 pounds per square inch

ASTM C-579 Compressive Strength - measures compressive strength, the capacity of axially directed pushing forces. 12,500 pounds per square inch - Verified. Not tested to failure.

ASTM C-307 Tensile Strength - measures the tensile strength of cured chemical-resistant materials. 3,200 pounds per square inch

ASTM D-4541 Bond Strength To Concrete - measures the strength of coatings bond to concrete. Concrete fails before POR-15 Rust Preventive Coating. It far exceeds the tensile strength of concrete

Abrasion Resistance

ASTM C-501 Taber Abraser- abrasive wear by determination of the loss of weight resulting from abrasion. In two separate tests, POR-15 Rust Preventive had:

  • No loss after 1,000 cycles with a 1,000 gram abraser
  • Loss after 10,000 cycles with 1,000 gram abraser = 0.09 grams

Weather Resistance

Weatherometer - accurate weather resistance indicator of cycling of conditions. The cycle is 30 mins sun at 135 degrees F, 30% relative humidity and 30 mins dark at 75-80 degrees F, 100% relative humidity 1,000 hours of exposure equals 5 years of simulated exposure in the Rocky Mountain region. There was no change in the 3 panels coated with POR-15 Rust Preventive Coating exposed for 2,000 hours.

ASTM B-117 Salt Spray - specimens are exposed at specific locations and angles. It creates a 100% relative humidity condition in the exposure zone.

Two separate B-117 tests. One with new bare steel and the other with rusted steel. Both were coated with POR-15 Rust Preventive Coating.

  • No change in 3 panels of new steel exposed for 250 hours at 98 degrees. Thickness = 2 mils
  • No change in 3 panels of rusted steel exposed for 1000 hours at 98 degrees. Thickness = 2 mils

Chemical Resistance

Chemical Bath Test - After 200 hours of soaking in the following chemical bathes, panels coated with POR-15 Rust Preventive Coating experienced no changes: 10% hydrochloric acid, 50% sulphuric acid, 55% chromate, 85% phosphoric acid, 10% sodium hydroxide 98% methanol.

Raw Sewage Test - A metal box that houses a filter for raw sewage in a treatment facility was coated with POR-15 Rust Preventive. After a year of service, no viable undercutting or rusting was present on the housing.

Impact, Porosity, and Temperature Tests

Mil-D-3134J Impact Resistance - POR-15 Rust Preventive Coating exceeds standards.

ASTM C-413 Water Absorption - method covers the determination of the absorption of chemical-resistant mortars, grouts, monolithic surfacings, and polymer concretes. 0.0001 maximum

NACE Stand TM0174 - 0.00 POR-15 Rust Preventive Coating is a non-porous coating.

Temperature Resistance - POR-15 Rust Preventive Coating is temperature resistant up to 450° continuously. A test showed that no adhesion was lost at 450° F for 10 hours.

Customer Reviews

Based on 1 review
David Russo
Salt Life

The best product I have use

Metal that is media blasted provides the best surface for coatings. If not possible, remove all built-up dirt, loose rust, and paint. Note that if you leave old paint behind, the rust preventive can only adhere as strongly as the paint it is applied over. This generally is not as strong as applying to prepped and scuffed-up bare metal.

These products should only be handled when wearing latex gloves, eye protection, and NOSHA approved respirator. Always work in a well-ventilated area. 

Step 1. Apply our POR-15 Cleaner Degreaser to a surface, agitate the surface with a scuff pad or brush and keep wet 10-15 minutes then rinse thoroughly with water and allow the surface to dry. Repeat if surface is still oily or greasy. It is important not to allow the product to dry on the surface prior to rinsing with water. POR-15 Cleaner Degreaser is a heavy duty water soluble cleaner that may be used over metal, wood, fiberglass, vinyl and concrete.

Step 2. Apply POR-15 Metal Prep to the bare metal surface, keep wet 10-15 minutes then rinse thoroughly with water and allow the surface to dry. It is important not to allow POR-15 Metal Prep to dry on the surface prior to rinsing with water. Once dry the surface may show a flash rust or white powdery residue this is perfectly normal. POR-15 Metal Prep provides the best surface profile and greatly improves paint adhesion to any type of metal surface for opaque paints and coatings.

Step 3. Wearing gloves and a properly fitted NOSHA approved respirator is recommended when applying POR-15 Rust Preventive Coating. Do Not shake. Mix by stirring until all solids at the bottom of the can are dissolved. Mixing may be done with a drill mixer on slow or by hand. It is recommended to apply two thin covering coats of POR-15 Rust Preventive Coating. Apply the first coat to the properly prepared substrate with a brush. Apply the second coat when the first coat is dry but still slightly tacky to the touch. If POR-15 Rust Preventive Coating is applied too heavy, brush marks may result in the finish. Do not apply this product if the humidity is above 70%. If the humidity is too high POR-15 Rust Preventive Coating will surface dry too quickly which may result in small bubbles in the finish. POR-15 Rust Preventive Coating requires an opaque topcoat only if exposed to direct sunlight. Best chemical adhesion to POR-15 Rust Preventive is when it is dry but still tacky (it has a finger drag). If the rust preventive is already completely dried or cured, you must scuff the surface with a maroon pad or 320-380 grit sandpaper for mechanical adhesion of a topcoat.

If your project will be exposed to U.V. light, topcoat it with POR-15 TopCoat, Engine Enamel, Caliper Paint, Detail Paint, or 2K Urethane industrial topcoat. You can topcoat with most other UV safe opaque paint as well.