Moisture Cure Urethanes (MCUs) are a type of polyurethane that is used to coat wood floors in homes. They make a very durable and scratch resistant finish and are often used on gymnasium and bowling alley floors. MCUs contain solvents and reactive chemicals that evaporate into the air and cause strong odors.
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How do urethanes cure?
Jan 25, 2018 · Latex and solvent-based adhesives cure by evaporation. Moisture-curing adhesives react with air or substrate moisture to set.
Moisture-cure polyurethanes -- or polyurethane prepolymer -- are isocyanate-terminated prepolymers that are formulated to cure with ambient water.