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Gold Bond® eXP® Interior Extreme®

 Interior Extreme


Gold Bond® BRAND eXP® Interior Extreme® Gypsum Panel is a moisture and mold resistant gypsum panel designed for interior applications requiring increased resistance to incidental moisture.

It is produced in 1/2" Regular and 5/8" Fire-Shield® Type X or C, 4' wide in standard lengths. eXP Interior Extreme is lightweight, scores and cuts easily and is specially coated on the front, back and sides for easy handling. eXP Interior Extreme is easily identified by the PURPLE® back facer.

Tapered edges allow joints to be reinforced with ProForm® BRAND Joint Tape and concealed with ProForm® BRAND Ready Mix or ProForm® BRAND Quick Set Setting Compounds.

Gold Bond BRAND eXP Interior Extreme C Gypsum Panel has a specially formulated core to achieve superior performance when used in specific fire-rated assemblies where the weight and number of wallboard layers are a concern.

Basic Uses

eXP Interior Extreme can be used in both wood and metal framed construction for interior wall and ceiling finishing while providing increased moisture and mold resistance.

Designed for use on the interior side of exterior walls, where moisture exposure is more likely.

Can be used for pre-rock applications before the building envelope is completely enclosed which may shorten construction cycles.

1/2" Fire-Shield C - For Single- or multi-layer construction in fire-tested assemblies.

5/8" Fire-Shield Type X or C - For single- or multi-layer drywall construction.  The specially formulated Type X core achieves superior performance when used in specific assemblies.


  • Manufactured to meet ASTM C 1658 and applicable sections of ASTM C 1396.
  • Will withstand up to 12 months of interior exposure to the elements, subject to the terms, conditions and exclusions of National Gypsum’s Limited Warranties. (Click here for warranty.)
  • Resists the growth of mold per ASTM D 3273 with a score of 10, the best possible score.
  • GREENGUARD listed as microbial-resistant when tested per ASTM D 6329.
  • Coated fiberglass mat on face and back for easy handling.
  • 5/8" Fire-Shield eXP Interior Extreme is an approved component in specific UL fire rated designs.
  • Single gypsum panel product can be used throughout entire project wherever gypsum board is specified.
  • Approved for use in protected exterior soffit applications.
  • Less than 5% water absorption per ASTM C 473.
  • GREENGUARD GOLD Certified as a low-emitting material.  Meets CHPS and CA Section 01350.





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Technical Data
CSI 3 Part Specifications   PDF  DOC
eXP Interior Extreme GuideSpec   PDF  DOC
Literature   PDF
Submittal   PDF
Checked items above will be available for email and download on the Submittal Builder page.

Other Resources