SoundBreak XP® Wall Board

Acoustically Enhanced High-Density Gypsum Wall Board

Turn down the noise when you incorporate SoundBreak XP Wall® Board into your wall assemblies. It reduces sound transmission between rooms or dwelling units with this superior sound-damping gypsum board.

SoundBreak XP has an acoustically enhanced, high-density gypsum core encased in heavy, abrasion and mold/mildew/moisture resistant, 100% recycled PURPLE® paper on both sides. Plus, SoundBreak XP provides superior mold-inhibiting qualities, perfect for your interior projects.


  • Product Overview

    Reduces Sound Transmission

    - Has a constrained layer of viscoelastic damping polymer sandwiched between two pieces of high-density, mold-resistant gypsum board
    - Provides high-rated Sound Class Transmission (STC) values per an independent third-party acoustical laboratory using ASTM E90 test procedures

    Works For Interior Projects

    - Use in a single layer or as a component of multi-layer interior wall assemblies
    - Thinner than traditionally built high-STC wall partitions, increasing usable floor space
    - Available in 1/2" and 5/8" (5/8" features a fire-resistant Type X Gypsum board core and is UL Classified)
    - Provides greater resistance to surface abuse and indentation than standard gypsum board (per ASTM C1629)

    Installs Fast And Easy

    - Installs like traditional gypsum board, without requiring additional clips and/or channels
    - Finishes and decorates as easily as standard gypsum board
    - For speed of installation, GridMarX® guide marks are printed on the paper surface.
    - Can cut by scoring deeply from both sides before snapping or by using a hand/power saw

    Inhibits Mold Growth

    - Helps inhibit mold growth with the highest possible score on mold tests (ASTM D3273 and ASTM G21)
    - Features Sporgard™ technology with extra mold-inhibiting properties
    - Has less than 5% water absorption per ASTM C473

    Resists Moisture Better

    - Fights the effects of moisture before damage can occur
    - Helps to reinforce the structure’s integrity and strength
    - Reduces or eliminates swelling or dimensional movement caused by moisture

  • Product Specs


    Use it for interior wall assemblies, where sound transmission between rooms or dwelling units is a concern. 5/8" SoundBreak XP Wall Board may be used where Type X Gypsum Board is specified in fire-rated assemblies.

    Material Composition

    Acoustically enhanced high-density mold-resistant gypsum core with inner constrained layer of viscoelastic damping polymer. Wrapped with 100% recycled PURPLE paper on both sides.


    Nominal 1/2" (12.7 mm)
    Nominal 5/8" (15.9 mm)


    Nominal 48" (1219 mm)
    8' through 12' (2438 mm - 3657 mm)

    Edge Detail

    Tapered Edges



  • Acoustical Specs
    • Provides superior Sound Transmission Class (STC) values per an independent third-party acoustical laboratory using ASTM E90 test procedures.
    • Achieves high STC values in a thinner wall assembly, increasing usable floor space.
    • Provides STC Ratings up to 56 for single-layer, steel stud partitions and up to 67 for area separation walls.
  • Material Performance

    Fire Performance

    Class A Fire Rated per ASTM E84

    UL Listed Assemblies

    The 5/8" SoundBreak® XP® Gypsum Board is tested in accordance with ASTM Standard E119 and is classified as Type X for use in the following UL listings:
    U017, U301, U302, U305, U309, U326, U330, U332, U338, U339, U341, U342, U351, U354, U355, U356, U357, U358, U360, U364, U368, U369, U371, U379, U392, U405, U411, U418, U420, U425, U428, U429, U434, U439, U449, U450, U460, U465, U466, U475, U487, U494, U499, U505, U524, U525, U531, U646, U647, U648, U649, U651, U652, U926, V408, V415, V419, V420, V421, V425, V430, V432, V433, V434, V435, V438, V449, V450, V486, V483, V484, V488UL
    Core Designation
    5/8" SoundBreak® XP® Gypsum Board: SoundBreak XP


    GREENGUARD Gold certified for low VOC Emissions
    Passes ASTM D3273 with score of 10 (best possible score for optimum mold resistance)
    Passes ASTM G21 with score of 0 (best possible score for optimum mold resistance)

    Material Properties

    Surface abrasion resistance level 3 classification per ASTM C1629
    Soft body impact resistance level 2 classification per ASTM C1629
    Indentation resistance level 1 classification per ASTM C1629
    Hard body impact resistance level 1 classification per ASTM C1629