---
title: "Combimix® CM 760 Fiber"
url: https://stacklist.com/card/3d61e33b-2abe-4a84-86d0-93b5b4906800
source_url: "https://formulatedmaterials.com/product/combimix-cm-760-fiber/"
stack: https://stacklist.com/c/business/stack/9073d4ec-818d-40e3-891e-00371e22930e
summary: "Combimix CM-760 Fiber is a high-strength, fiber-reinforced self-leveling underlayment compound designed for creating durable, flat surfaces on interior concrete subfloors. It offers fast setting, enhanced crack resistance, and compatibility with various substrates, serving as a reliable base layer for floor coverings and coatings."
tags: "fiber-reinforced, self-leveling, underlayment, crack-resistant, concrete-preparation, floor-leveling, pumpable"
key_entities: "Combimix CM-760 Fiber (technology), calcium aluminate cement (technology), fiberglass reinforcement (technology), PP 600 primer (technology), Combimix (organization), self-leveling underlayment (concept), fiber reinforcement (concept)"
classification: "reference"
content_hash: "sha256:d3ce5006ea0b8556da9507d682d37cb4333f6e378467602c3a5f01d9b8809684"
acp_version: "0.2"
token_counts_approximate: 576
visibility: public
agent_accessible: true
status: "final"
---

# Combimix® CM 760 Fiber

Skip to content SKU: 10403 Type: Combimix Tags: crack-resistant floor leveling , fiber-reinforced self-leveling underlayment , interior concrete subfloor preparation Combimix® CM 760 Fiber Fiber-Reinforced Self-Leveling Underlayment CM 760 Fiber is a high-strength, pumpable, fiber-reinforced self-leveling compound designed for creating durable, flat, and smooth surfaces. Suitable for new construction or renovation, it delivers fast setting, added flexural strength from fiber reinforcement, and compatibility with a wide range of substrates. CM 760 Fiber is not intended as a wear surface but provides a reliable base layer for resilient floor coverings or coatings. Description Recommended Usage Substrate Requirements Packaging Data Sheets Description CM 760 Fiber combines calcium aluminate cement with fiberglass reinforcement for enhanced stability and crack resistance. It levels and smooths substrates efficiently with pump or hand application, offering a fast turnaround for covering. Interior use on concrete, lightweight concrete, stone, tile, gypsum, wood, terrazzo, and well-bonded VCT/VAT Exterior use under tile in sweetwater conditions (e.g., patios), but not for constant water immersion Not a wear surface – must be covered by floor coverings or coatings Pumpable or hand-applied for versatile installation Fiber reinforcement reduces shrinkage and cracking Fast setting: walkable in 1–3 hours Coverable with most floor coverings after 24 hours Fire classification A1fl Recommended Usage Approved for use over properly prepared and primed substrates, including: Concrete and lightweight concrete Natural stone, ceramic tile, quarry tile Cement- or epoxy-based terrazzo Gypsum and wood substrates Well-bonded resilient floors (VCT, VAT) Substrate Requirements Clean, structurally sound, free of dust, grease, or weak material Surface tensile bond ≥ 72 psi Must be primed with PP 600 before pouring Concrete must be ≥ 28 days old; RH ≤ 90% before application Ambient and substrate temperature: 50–77 °F Packaging 44 lb bags and big bags Shelf life: 6 months unopened, stored dry on plastic-coated pallets Data Sheets Technical Data Sheet Safety Data Sheet Related products Combimix® CM 940 Industrial Top Combimix® CM 960 Industrial Super Top Combimix® BetongSpackel Combimix® CM 750 S