Max Corrosion Resistant Primer (CRP)

Max Corrosion Resistant Primer (CRP)

Max Corrosion Resistant Primer (CRP) is a high performance polymer polyurea designed to give catholic protection when used on conducting metals. It is 100% solids and does not contain VOCs. Its formulation is used extensively in severe environments such as coastal marine, naval/shipbuilding, industrial chemical processing piping, underground piping, tanks and water treatment plants. CRP is designed to provide excellent adhesion to metal substrates to prevent surface oxidizing reactants from reaching the surface. CRP is compliant with ASTM G80-07 / NACE No.2 (REAP Method), Catholic Disbondment of Pipeline Coatings. It is normally used to protect steel, iron and aluminum. It retains flexibility to match our super-polymer topcoats. Top-Coats may include other Polymers as well as standard epoxies, urethanes or acrylics. CRP must be top coated if exposed to long-term sunlight. A finished CRP primed surface provides excellent chemical and abrasion resistance. CRP may be color-tinted and used directly in underground applications.

Max Corrosion Resistant Primer PHYSICAL PROPERTIES


Salt Water Spray


Pass 500 hours

Seawater Immersion


Pass 300 hours

Tear Strength


400 lbs/ linear in.


ASTM D1737

Pass 1/8" mandrel

Tensile Strength


3250 psi



>150 %

Hardness Shore D

ASTM D2240


Cathodic Protection

ASTM G80-07

Pass 25°C, 65°C, 80°C

Gel Time



Mix Ratio



* Values Relative To Over Indexed Formulation

Technical Application Preparation of substrate surface prior to the application of CRP is extremely important as durability is only as good as the weakest link in the coating system. A minimum spray film thickness of 16 mils will provide adequate catholic protection. The surface temperature must be 5° above dew point and no condensation is present on the surface. CRP requires the metal surface be clean/dry and free from corrosion or contaminates; i.e. loose rust, paint, moisture, dirt, oils, etc. Normally, grinding and/or sanding is sufficient. If application surface exhibits extensive corrosion, standard sand media blasting is recommended to create a secure 6 mil surface texture preparation, typically blast clean to SSPC-SP 10. CRP may be applied over very lightly dry rusted prep-sanded surfaces. Aluminum must be acid prepped, washed and dried prior to spray application. Always power clean using steam and mild detergent prior to any sanding operation as to not spread or induce contamination into prepped surface. This product is applied using high pressure heated plural component liquid pumping equipment. Product may be headed up to 120°F. Surface application temperature may range from 20°F to 150°F. Spray gel time at 75°F is 30s-5min. Extended tacky time may be formulated up to 4 hours. Functional operation temperature ranges from -40°F to 250°F. Recommended minimum application film thickness is 16 mills to provide catholic protection. Multiple coats may be sprayed if desired. Final sprayed surface is glossy smooth. Refer to MSDS for material and safety standard procedures. Store materials in dry environment. For long storage, displace air in drums with Nitrogen. Always wear safety gear for breathing and full-face protection at all times. Preparation of substrate surface prior to the application of Polymers is extremely important as durability is only as good as the weakest link in the coating system. Call TechSupport Group for assistance with the selection of a Polyurea protective coating system. Also read the Application Page on this website. It is always best to perform a test within a small section of the application area prior to full scale engagement.


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