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National Gypsum Company is the exclusive service provider for products manufactured by Gold Bond Building Products, LLC, PermaBASE Building Products, LLC and ProForm Finishing Products, LLC.

Terms & Conditions / Product Warranties

Please click on the links below for Terms and Conditions of Sale and warranties for products manufactured by Gold Bond Building Products, LLC; PermaBASE Building Products, LLC; and ProForm Finishing Products, LLC.

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eXP® Tile Backer Commercial

Commercial Construction Limited 20 Year Warranty
View Warranty
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eXP® Tile Backer Residential

Residential Dwellings Lifetime Limited Warranty
View Warranty
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Gridstone® Gypsum Ceiling Panels

15 Year Limited Warranty
View Warranty
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PermaBASE™ Foam Tile Backer

Residential Dwellings 10 Year Limited Warranty
View Warranty
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PermaBASE® Interior Commercial

Commercial Construction 30 Year Limited Warranty
View Warranty
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PermaBASE® Interior Residential

Residential Dwellings Lifetime Limited Warranty
View Warranty