FF 830

FF 830 is a quick-drying finishing underlayment designed for skim-coating, smoothing and leveling prior to the application of floor coverings.

FF 830 is suited for new construction and renovations. The product is intended for indoor use on substrates of concrete, lightweight concrete, ceramic tiles, gypsum boards, wood and homgenous PVC. FF 830 is easy to use and yields a very smooth surface finish.

Send all files

Download all files


Product specification

Technical data

Compressive strength class

4,350 psi

Flexural Strength, class

870 psi

Fire resistance class


Adhesion to surface

> 144 psi

Thickness 1


Weight (dry state)

75 lbs/ft3

Wet volume weight

95 lbs/ft3

Water requirements

1.9 qt/10 lb

Workplace temperature

50–77 °F

Mixing time

2+1 min

Working time

15–25 min

Final set

30–60 min


approx. 11

Water damage resistant



0,03–0,05 %

TVOC 28 days

< 10 μg/(m2 h)



4,5 kg




The substrate should be clean and free of dust, cement skin, grease and other impurities that can prevent adhesion. Adhesion and surface resistance of the substrate should be no less than 72 psi. Always prime the substrate with PP 600 and allow to dry before applying the FF 830 (see PP 600 datasheet for proper dilution and installation directions). In terms of the primer forming a film, the temperature of the substrate must not be below 50 °F. For best results, the ambient temperature in the work area should be between 50 and 77 °F. At higher or lower temperatures, the time for curing will shorten or extend. Protect the product from excessive heat, excessive cold and draft conditions during and after the installation. It is recommended that the installation should be done with a proper air ventilation from an HVAC system. With the risk for cracks due to shrinkage or settings in the subfloor, a concrete surface should not be leveled within the first 28 days after casting. As a recommendation the RH in the concrete should have reached RH 90 % as the upper limit for applying FF 830.


Mix the dry powder with max 1.9 qt (1.8 L) of cold, potable water, max 40 %, per 10 lb (4.5 kg) bag. Do not overwater. Mix for 2–3 minutes with a heavy duty drill mixer (650 minimum rpm) to obtain a lump-free mix. Product can be freshened by remixing without any additional water.


Apply the FF 830 to substrate at a thickness of feather edge to 1/2” (12 mm) for all surfaces. After initial set of material (approx. 10–15 min.), remove any overlap marks, seams and inconsistencies by scraping with a steel trowel.

Post-treatment and curing

Protect FF 830 from excessive heat or draft conditions during the curing process. Protect for up to 24 hours after completed installation. Material can be walked on after 30 minutes.Before covered by carpet be sure that the subfloor is dry enough. The guiding value assumes a curing temperature of approximately 68 °F, 40 % RH and proper air flow. Newly produced surfaces must be protected against wind, sun and rain.

Consumption calculator

FF 830

Consumption calculator


+46 171 46 65 90

Call our order department

Contact us

  • Verkstadsvägen 6
  • 746 40 Bålsta, Sweden
  • Tel. +46 171 46 65 91
  • Fax. +46 171 46 65 99
  • E-mail:


Combimix develops and manufactures mineral-based products for the construction industry. Our product range includes products for floor levelling, façade plastering, rendering, concrete resurfacing and restoration mortar for cultural buildings. We conduct sales in Europe and USA.

Product categories