Rust Grip® US Army Corps of Engineers Test Report Summary
US Army Corps of Engineers Test Report Summary
Moisture-Cure Urethane Coatings for Compliance with Industry specifications – SSPC Paint 41
Superior Products International ll, Inc. with Rust Grip marked MC4
Sherwin Williams with Corothane l Ironox B marked MC2
Wasser Coatings with MC Ferrox B 100 marked MC 6
Wasser Coatings with MC-Miomastic 100 Red Oxide marked MC8
Indmar Coatings Corp with Chem-Thane 2821 marked MC10
Summary of Test Results
Stability: All products except for Chem-Thane 2821 met all requirements of the specification for stray stability, mixing properties, and spraying properties.
Adhesion: All met with minimum requirements. Rust Grip and Wasser Miomastic 100 Red Oxide exceeded the minimum requirements for adhesion to the substrate.
Corothane I Ironox B, MC Ferrox B 100, and Chem-Thane 2821 were tested under a different system as intermediate coats over their perspective primers (two-coat system).
Rust Grip and MC-Miomastic 100 Red Oxide were tested as one coat primers direct to metal.
Weathering: Scribed panels cycled between a fluorescent UV/Condensation apparatus and a salt fog apparatus. All the coatings exceeded the minimum requirements for blistering and rust undercutting the scribe.
Only two of the products, Corothane I Ironox B and Rust Grip passed the rust evaluation requirement of the specification.
The other three products, MC Ferrox B 100, MC-Miomastic 100 Red Oxide, and Chem-thane 2821 showed a range of rusting with the Chem-thane 2821 being the worst.
Impact: All the products exceeded the minimum impact requirement for intrusion testing but fell far short of the specification value when evaluated on the extrusion side of the panel with Chem-thane 2821 performing the worst.
- Rust Grip was the most consistent performer of all the coatings.
- Rust Grip was one of two coatings (with MC-Miomastic 100 Red Oxide) to exceed the minimum requirements for adhesion and only one of two coatings to be applied directly to metal.
- Rust Grip was one of two coatings (with Corothane I Ironox B) to pass the rust evaluation requirement of the specification.
- No other coating performed at the same level as Rust Grip in exceeding and passing the test requirements.
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