TREADSTONE® Interior Underlayment Systems cover

TREADSTONE® Interior Underlayment Systems

Curated byFormulated Materials22 cardsUpdated Jun 2026
Full product line for TREADSTONE interior underlayment systems by Formulated Materials. Includes fire-rated gypsum underlayments, acoustic mats, leveling compounds, primers, seam tapes, and perimeter isolation components for multifamily construction.
Treadstone® Interior Underlayment Systems
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Treadstone® Interior Underlayment Systems

Treadstone® Floor Underlayment Systems offer superior fire resistance, acoustic mats and self-leveling solutions; 10x stronger and 25% lighter than leading brands.

Gypsum Floor Underlayments
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Gypsum Floor Underlayments

Treadstone® gypsum underlayments are a proprietary cementious formulation with the fire-resistive, non-shrinking, fast cure qualities of a gypsum underlayment with enhanced compressive strength, high flow and abrasion resistance — eliminating the “soft, chalky” negative association of gypsum products of the past. TREADSTONE® provides a full line of gypsum underlayments, self-levelers, and acoustic underlayments engineered to elevate the construction industry.

Treadstone® FR25
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Treadstone® FR25

Our innovative Treadstone® FR25 gypsum concrete formulation adds the cementitious properties of high flow, high strength and abrasion resistance to the fire-resistive, non-shrinking, fast cure properties of gypsum underlayment.

Treadstone® FR30 Gypsum Underlayment
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Treadstone® FR30 Gypsum Underlayment

Treadstone® FR30 is an advanced gypsum concrete formulation that offers fire-rated performance and higher compressive strength of up to 3800psi. It combines the fire-resistive and high flow properties of Treadstone® FR25, making it an ideal choice for various construction applications.

Treadstone® FR30P Pre-Pour
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Treadstone® FR30P Pre-Pour

Treadstone® FR30P pre-pour underlayment provides an effective solution to pre-pour projects of underlayment between interior walls, and below locations of tubs, shower enclosures and other areas containing appliances installed before the installation of underlayments.

HydroPhase® APS Advanced Primer & Sealer
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HydroPhase® APS Advanced Primer & Sealer

Formulated Materials® APS leveling concrete primer is a low VOC acrylic primer and sealer for improved performance of fire-rated underlayments and levelers by providing a solid bond to the substrate during installation. This product enhances substrate bonding, ensuring optimal results in various applications.

Treadstone® TP1 Primer & Sealer
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Treadstone® TP1 Primer & Sealer

Treadstone® TP1 pre-pour surface primer is a low VOC acrylic primer suitable for priming wood substrates prior to installing Treadstone® fire-rated underlayments and levelers. This product ensures optimal adhesion and performance for your flooring projects.

Treadstone® Technical Felt
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Treadstone® Technical Felt

Treadstone® Technical Felt synthetic felt underlayment is a reinforced, durable, leak-proof, vapor retarding membrane that speeds the preparation of subfloors. This multi-purpose moisture-control felt underlayment is designed for various applications, ensuring effective moisture management and enhanced flooring performance.

Leveling Underlayments
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Leveling Underlayments

Treadstone® has created a class of engineered self-leveling underlayments that incorporate the latest advances in formulation science to conquer the most complex design challenges. Each leveler delivers performance characteristics exceeding today’s toughest floor covering requirements.

Treadstone® Leveling Pins
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Treadstone® Leveling Pins

Leveling pins provide a convenient method of marking and maintaining an adequate grid system when pouring levelers to required tolerances. These quick visual indicators ensure precision in leveling applications.

Treadstone® Sitemix Leveling Underlayment
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Treadstone® Sitemix Leveling Underlayment

Treadstone® Sitemix leveling underlayment is a uniquely designed polymer modified, pourable underlayment. The proprietary high cement, high polymer formulation maximizes hardness, flow, and durability.

Treadstone® SiteMix Ultra
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Treadstone® SiteMix Ultra

Treadstone® SiteMix Ultra leveling underlayment is a technologically advanced polymer-modified hydraulic cement formulation providing increased early strength to withstand construction traffic. This product utilizes hybrid cement technology to address the toughest flooring challenges effectively.

Acoustic Mat Underlayments
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Acoustic Mat Underlayments

Treadstone® acoustic underlays incorporate two types of technology — monofilament and rigid structure — developed to enhance the acoustical performance of poured Treadstone® fire-rated gypsum underlayments. This innovative technology isolates vibration and limits contact with the substrate, ensuring long-term acoustic control performance for multi-family construction sound control needs.

Treadstone® SM Seam Tape
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Treadstone® SM Seam Tape

Treadstone® SM (Sound Mat) Seam Tape is an advanced proprietary tape engineered with a coated crepe paper backing and a robust natural/synthetic rubber adhesive blend. This product is designed to provide superior soundproofing and durability for various applications.

Treadstone® M2 Acoustic Mat
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Treadstone® M2 Acoustic Mat

Treadstone® M2 acoustic mat is a three-dimensional mesh of polypropylene, synthetic monofilaments that are UV stabilized, tangled and welded to cross laminate to the polypropylene barrier fabric. With its U-shaped geometry, M2 delivers optimum sound control between floor levels, with excellent compression resistance.

Treadstone® M3 Acoustic Sound Mat
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Treadstone® M3 Acoustic Sound Mat

The Treadstone® M3 is an innovative acoustic sound mat designed to reduce noise and vibrations. Made from a three-dimensional mesh of polypropylene synthetic monofilament, it is UV stabilized and features a unique laminate structure for enhanced performance.

Treadstone® R1 Sound Mat
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Treadstone® R1 Sound Mat

Treadstone® R1 Sound Mat utilizes our new Q-Seam Technology, which provides a robust foundation for the underlayment and ensures proper installation. This product is designed to enhance soundproofing and improve the overall performance of flooring systems.

Treadstone® Elite
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Treadstone® Elite

Treadstone® Elite Acoustic Underlay delivers industry-leading compression resistance and acoustical performance when installed over the most commonly specified flooring assembly in multi-family construction.

Treadstone® Elite Max
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Treadstone® Elite Max

Premium acoustic underlayment for wood frame multifamily projects requiring superior sound performance and lasting durability.

Treadstone® Elite Duo
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Treadstone® Elite Duo

Treadstone® Elite Duo acoustic mat combines two new innovative technologies that provide unmatched acoustical performance and durability in a patent pending sound mat. Its industry leading deflection/compression innovation allows for Treadstone® underlayment depths of ¾" minimum providing an overall thickness of just over 1 ".

Treadstone® Perimeter Isolation Strip
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Treadstone® Perimeter Isolation Strip

The Treadstone® Perimeter Isolation Strip is a polyethylene foam strip designed to reduce impact vibration transfer. It effectively isolates Treadstone® underlayments and finished floor coverings from walls and subfloors, enhancing overall flooring performance.

Treadstone® Waterproofing Perimeter Tape
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Treadstone® Waterproofing Perimeter Tape

Poly Hot-Melt tape specifically designed to seal the joints between seams of TREADSTONE® Sound Mat products and to join Treadstone® Acoustical Mats to Treadstone® Perimeter Isolation Strip at perimeter walls and plumbing or other floor penetrations.