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HydroPhase C150 and P150 Underlayment: CSI MasterSpec 03 54 16 (Cementitious)
HydroPhase C150 and P150 are polymer-modified hydraulic cement self-leveling underlayments, with C150 being a concentrate requiring local sand and automated gravimetric batching for large projects, while P150 is a pre-sanded formulation for simpler installation. Both products achieve identical performance, including 5,000 psi compressive strength, and are specified with primers, related flooring systems, and require submittals for product data and quality control testing like slump and moisture vapor emission rate.
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