Benjamin Moore HP1550 Concrete & Metal Epoxy Primer – Formerly Corotech V155 | Rust & Masonry Sealer

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1 GALLON KIT (Includes A and B)

Benjamin Moore HP1550 Concrete and Metal Epoxy Primer (formerly Corotech V155) is a professional-grade, two-component penetrating epoxy sealer designed to reinforce and protect challenging surfaces. This low-viscosity formula is engineered for clean or rusted steel, galvanized metal, and masonry where complete surface preparation is difficult or impossible.

With excellent penetration and sealing capabilities, HP1550 bonds to tightly adhered rust, sealing pinholes, loose edges, and surface imperfections to ensure maximum adhesion of subsequent coatings. This 100% solids epoxy primer also serves as a barrier coat when applying high-performance coatings over existing alkyd finishes.

KEY FEATURES:

• Formerly Corotech V155
• Low-viscosity, penetrating epoxy that seals and reinforces surfaces
• Bonds to tightly adhered rust on steel and galvanized metal
• Excellent masonry sealer for concrete and block surfaces
• Works as a barrier coat over alkyds for improved adhesion
• 100% solids formula for maximum film build and durability
• Premeasured two-component mix – no measuring required

IDEAL APPLICATIONS:

• Rusted or “white rusted” steel and galvanized metal
• Concrete, masonry, and block walls
• Industrial tanks, machinery, and structural steel
• Barrier coating for high-performance systems

RECOMMENDED FOR:  Interior or Exterior, Concrete, Galvanized Metal and Reinforced Steel. 100% Solids Epoxy Pre-Primer is designed for use on bare or previously coated concrete, “White Rusted” galvanized metal, and reinforcement of rusted steel. It seals loose edges and crevices, pinholes and other surface imperfections.

COVERAGE:

• Steel: 800 – 1200 sq.ft.
• Masonry: 500 – 800 sq.ft.
• Previously Coated: 1200 – 1600 sq.ft.

Dry Times: @ 77 °F – To Touch 12 Hours, To Recoat 12 Hrs. – Max: 3 Days

• Service Time: Light Industrial Use: 72 Hours Moderate to Heavy Industrial Use: 5-7 days Full Cure: Approximately 7 Days *If topcoat is not applied within 72 hours abrade the surface to ensure proper inter-coat adhesion. Maximum abrasion and chemical resistance are achieved at full cure; care should be taken to prevent damage to the coating during the curing process. High humidity and cool temperatures will result in longer dry, recoat and cure times.

POT LIFE: @ 77 °F - 3 – 4 Hours

INDUCTION TIME: 30 Minutes

Surface Preparation: Surfaces must be clean, dry and free of all grease, dirt, dust, oil and wax. Clean all surfaces using HP6000 Oil & Grease Emulsifier. Remove all remaining loose paint, rust and mill scale via Hand Tool Cleaning (SSPC-SP 2) or Power Tool cleaning (SSPC-SP 3). Fill holes and cracks and sand smooth. Glossy surfaces must be fully deglossed. Moderate to heavily rusted areas must be thoroughly prepared and active rust should be properly removed. All masonry surfaces must be allowed to cure a minimum of 30 days before painting. Acid etch or mechanically abrade all slick, glazed concrete or concrete with laitance. For acid etching, follow ASTM D4260 and manufacturer’s directions and safety instructions. Follow ASTM D4259 for creating a surface profile by abrasion. Rinse thoroughly and allow to dry.

Previously Painted Surfaces: Clean using HP6000 Oil & Grease Emulsifier or solvent washed as outlined above. Dull glossy surfaces by sanding. Remove all loose, flaking or peeling paint prior to application.

MIXING INSTRUCTIONS: This is a two-component product and is preproportioned for error free mixing. Mix “A” & “B” separately.

1. Carefully empty the entire contents of HP1550.90 (Part B) into the can of HP1550.00 (Part A), scraping the sides of both parts to ensure all liquid has been added.
2. Using a drill mixer at low speed, blend this mixture for three to five minutes until completely blended. Keep the mixing blade turning at a slow speed to minimize whipping air into material. Scrape sides of pail during the mixing process.
3. Allow to induct for 30 minutes at 77 °F (25 °C) to application.

Do not thin this product – it is ready to use once both components are thoroughly mixed. It is extremely important to remember that Epoxy Coatings have a limited pot life; therefore, it is wise to make sure sufficient manpower and correct application tools are in order prior to starting the mixing sequence. Estimated pot life is: 3 – 4 Hrs.

APPLICATION:

• Airless Spray: Apply with .009 tip and low pressure (just enough to atomize the product).
• Air Spray (Preferred for appearance and film build): To minimize over spray, use low air pressure and a pot pressure of 5-10 PSI.
• Brush: Natural Bristle only Roller: Industrial Cover with Phenolic corewith a ¼” nap.
• Must be top-coated within 72 hours of being tack free.
• NOTE: Do not allow material to remain in hoses, gun or spray equipment. Thoroughly flush all equipment with HP7040. Do not thin. Where non-skid characteristics are desired, hand broadcast an appropriate anti-slip aggregate into the wet film then back-roll to encapsulate. HP6300 works well for opaque finishes although will be noticeable in clear finishes.

NOTE ON SPREAD RATE: Theoretical coverage at 1 mil dry is 1604 square feet per gallon; however, practical application is expected to be 600-800 square feet per gallon. Actual spread rate will vary based upon numerous factors, including texture of the substrate, application method, waste and surface porosity. The Theoretical Spread rate listed on this document has not taken into account these factors and is only based upon the volume solids of this product and the recommended wet film thickness when applied to a smooth substrate.

LIMITATIONS: 

• Do not apply if material, substrate or ambient temperature is below 50 °F (10 °C) or greater than 90 °F (32 °C). Relative humidity should be below 90%.
• Do not apply if within 5 degrees of dew point or if rain is expected.