---
title: "Gypsum Floor Underlayments"
url: https://stacklist.com/card/dd61b9a1-7190-4395-8be7-e4e64b6649c9
source_url: "https://formulatedmaterials.com/catalog/treadstone/gypsum-flooring-underlayment/"
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summary: "Treadstone gypsum floor underlayments are proprietary cementitious formulations offering fire-resistive, non-shrinking, fast-cure properties with enhanced compressive strength and abrasion resistance. The product line includes FR25, FR30, FR30P variants, primers, sealers, and technical felt for comprehensive flooring substrate solutions."
tags: "gypsum-underlayment, flooring, fire-rated, construction-materials, treadstone, concrete-formulation, substrate-preparation"
key_entities: "Treadstone (technology), Treadstone FR25 (technology), Treadstone FR30 (technology), Treadstone FR30P (technology), HydroPhase APS (technology), Treadstone TP1 (technology), Treadstone Technical Felt (technology), gypsum-concrete-underlayment (concept), fire-resistant-flooring (concept)"
classification: "reference"
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acp_version: "0.2"
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status: "final"
---

# Gypsum Floor Underlayments

Skip to content 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. Select Category Filter Treadstone® (6)  Gypsum Floor Underlayments (6) Gypsum Floor Underlayments Treadstone® FR25 Fire-Rated Performance with High Flow 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. Gypsum Floor Underlayments Treadstone® FR30 Fire-Rated Performance with Higher Strength This advanced gypsum concrete formulation of Treadstone® FR30 gypsum underlayment includes the fire-resistive and high flow properties of Treadstone® FR25 , but with an additional compressive strength of up to 3800psi. Gypsum Floor Underlayments Treadstone® FR30P Pre-Pour Fire-Rated Underlayment for Pre-Pours 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. Gypsum Floor Underlayments HydroPhase® APS Advanced Primer & Sealer Underlayment & Leveler Substrate Bonding 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. Gypsum Floor Underlayments Treadstone® TP1 Primer & Sealer Pre-Pour Surface Prep for Wood Substrates 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. Gypsum Floor Underlayments Treadstone® Technical Felt Multi-Purpose Moisture-Control Felt Underlayment Treadstone® Technical Felt synthetic felt underlayment is a reinforced, durable, leak-proof, vapor retarding membrane that speeds the preparation of subfloors. Submittal Builder Quickly build and download submittals for projects Courses Provides instruction on the best practices to ensure successful installations Documentation Access Technical Data Sheets, Safety Data Sheets, Details and Warranties Search Clear