---
title: "Combimix® FF 830"
url: https://stacklist.com/card/a767c845-47d6-44dd-90f2-1cb088935d2f
source_url: "https://formulatedmaterials.com/product/combimix-ff830/"
stack: https://stacklist.com/c/business/stack/9073d4ec-818d-40e3-891e-00371e22930e
summary: "Combimix FF830 is a quick-drying cement-based finishing underlayment designed for skim-coating, smoothing, and leveling interior substrates before floor coverings installation. It offers fast application with 30-minute walkability, water damage resistance, and low shrinkage for residential and commercial projects."
tags: "cement-based, floor-leveling, quick-drying, underlayment, skim-coat, finishing-material"
key_entities: "Combimix FF830 (technology), PP 600 (technology), cement-based skim coat (concept), interior floor leveling (concept), Combimix CM 920 (technology), Combimix CM 940 (technology), Combimix CM 780 (technology), Combimix CM 750 S (technology)"
classification: "reference"
content_hash: "sha256:d88930e9638b0f52ead5371c33f78c10caa6122d0959e98c616c25e080503e71"
acp_version: "0.2"
token_counts_approximate: 600
visibility: public
agent_accessible: true
status: "final"
---

# Combimix® FF 830

Skip to content SKU: 10408 Type: Combimix Tags: cement-based skim coat , interior floor leveling , quick-drying underlayment Combimix® FF 830 Quick-Drying Finishing Underlayment FF 830 is a quick-drying cement-based finishing underlayment designed for skim-coating, smoothing, and leveling interior substrates before floor coverings are installed. It can be applied from feather edge up to 1/2 inch and produces a very smooth surface that is ready for carpet, resilient, tile, or other floor finishes Description Recommended Usage Substrate Requirements Packaging Data Sheets Description FF 830 is intended for new construction and renovation projects where a fast, easy-to-use skim coat is needed. For indoor use only on concrete, lightweight concrete, ceramic tile, gypsum boards, wood, and homogeneous PVC substrates Quick-drying formulation that can be walked on after about 30 minutes under typical conditions Application range from feather edge to 1/2 inch (12 mm) in a single lift Working time is approximately 15–25 minutes at normal room temperature Final set in 30–60 minutes Water damage resistant with very low shrinkage (0.03–0.05 percent) Compressive strength about 4,350 psi and flexural strength about 870 psi Surface tensile bond strength greater than 144 psi after 7 days Fire classification A1fl Recommended Usage Use FF 830 as a finishing underlayment prior to installation of floor coverings in: Interior residential or commercial areas on concrete or lightweight concrete Skim-coating and smoothing over existing ceramic tile or stone Leveling gypsum boards and wooden subfloors Smoothing homogeneous PVC prior to new finishes Substrate Requirements Substrate must be clean and free of dust, cement skin, grease, and other bond breakers Adhesion and surface resistance of the substrate at least 72 psi Always prime with PP 600 and allow the primer to dry before applying FF 830 Substrate temperature not below 50 °F and ambient temperature in the work area between 50 and 77 °F Concrete should be at least 28 days old and at or below 90 percent RH before leveling Packaging Supplied in 10 lb (4.5 kg) bags Shelf life: 6 months from date of production when stored unopened in a dry environment on plastic-coated pallets Data Sheets Technical Data Sheet Related products Combimix® CM 920 Industrial Combimix® CM 940 Industrial Top Combimix® CM 780 Fiber Basic Combimix® CM 750 S