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HardieBacker HardieBacker 0.25-in x 36-in x 60-in Fiber Cement Backer Board

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  • HardieBacker cement board with Moldblock Technology

  • Made of 90% premium portland cement and sand, HardieBacker board best resists underlayment damage from moisture and mold beneath floors

  • The only backerboard to obtain a perfect score on both ASTM G21 and D3273 tests for mold resistance

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