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50 Eco-Friendly Products Selected by Green Builder's Editors


Rhino Linings Bio-Based 501W

Posted by Juliet Grable

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Feb 17, 2014 7:02:00 PM


This open-cell, semi-rigid, polyurethane foam does away with ozone-depleting propellants by being completely water blown. With a density of 0.5 per cubic foot and a minimum of 3 percent bio-based material, this product expands 100:1 when sprayed, filling voids and crevices and reducing infiltration—and consequently, energy demand. With an R-value of 3.8 per inch—R-20 at 5.5”—Bio-Based 501W contributes to a tight building envelope, while reducing the risk of moisture accumulation and sound transfer.

Topics: Super-insulated Envelope, Insulation, spray foam insulation