---
title: "Combimix® CM 750 S"
url: https://stacklist.com/card/2c80a074-c242-463e-a56c-c372063c787a
source_url: "https://formulatedmaterials.com/product/combimix-cm750s/"
stack: https://stacklist.com/c/business/stack/9073d4ec-818d-40e3-891e-00371e22930e
summary: "Combimix CM750S is a pumpable, fast-setting self-leveling underlayment designed for interior concrete subfloor preparation in new construction and renovation projects. It offers quick setting times (1-3 hours walkable), high compressive strength, and compatibility with various substrates including concrete, stone, and ceramic tile."
tags: "self-leveling-underlayment, floor-leveling, concrete-subfloor, fast-setting, pumpable, interior-flooring, construction-materials"
key_entities: "Combimix CM750S (technology), PP 600 primer (technology), self-leveling underlayment (concept), fast-hardening compound (concept), Combimix (organization)"
classification: "reference"
content_hash: "sha256:511c84a38c7218826102b223634b5f65537695157c130a3dc073fb6cfbf9c861"
acp_version: "0.2"
token_counts_approximate: 631
visibility: public
agent_accessible: true
status: "final"
---

# Combimix® CM 750 S

Skip to content SKU: 10402 Type: Combimix Tags: fast-setting floor leveling , interior concrete subfloor preparation , pumpable self-leveling underlayment Combimix® CM 750 S Pumpable, Fast-Hardening Self-Leveling Underlayment CM 750 S is a pumpable, fast-setting self-leveling compound with excellent flowability, designed for efficient application in new construction and renovation projects. Suitable for indoor use on concrete, lightweight concrete, stone, terrazzo, and ceramic tile, CM 750 S delivers a smooth, durable surface ready for coverings. With quick setting times and reliable fiber-free reinforcement, it ensures consistent, crack-minimized performance. Description Recommended Usage Substrate Requirements Packaging Data Sheets Description CM 750 S is formulated for speed and efficiency in leveling interior mineral-based substrates. Its quick set and self-drying properties reduce downtime, while strong bond strength supports long-term durability under floor coverings. For indoor use only (not a wear surface, not for exterior) Compatible substrates: concrete, lightweight concrete, stone, terrazzo, ceramic tile Pumpable or hand-applied for small and large areas Quick setting and walkable in 1–3 hours High compressive strength (avg. 4,200 psi) and flexural strength (avg. 950 psi) Tensile bond strength: > 217 psi (substrate) / > 290 psi (7-day surface bond) Fire classification: A1fl Working time: ~10–20 minutes @ 70 °F Final set: 1–2 hours Water-damage resistant and very low shrinkage (0.03–0.05%) Recommended Usage CM 750 S is approved for interior leveling projects requiring speed, strength, and smoothness before applying coverings such as resilient flooring, ceramic tile, carpet, or wood. Self-leveling underlayment for renovation or new build Base for epoxy or PU coatings (pedestrian traffic only) Smoothing uneven mineral substrates 0″–½″ (0–12 mm) per application Walkable in hours; coverable after ~24 hrs (RH ≤ 85%) Substrate Requirements Clean, sound, and free of dust, grease, or cement skin Surface tensile bond ≥ 72 psi (≥ 217 psi if under epoxy/PU coatings) RH ≤ 90% (recommended max at pour) Must be primed with PP 600 before application Substrate and ambient temp ≥ 50 °F Packaging 44 lb (20 kg) 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 920 Industrial Combimix® CM 940 Industrial Top Combimix® CM 960 Industrial Super Top Combimix® BetongSpackel