Ready-to-use, fast-drying, liquid waterproofing membrane for sealing indoor wall and floor surfaces in damp and wet areas, intended for use beneath ceramic or natural stone coverings. This includes floor surfaces in bathrooms equipped with a shower tray or bathtub but lacking a floor drain as well as wall surfaces in sanitary facilities within public or commercial settings that feature floor drains but are not exposed to chemical substances. Depending on the water exposure class, suitable substrates include, for example: gypsum wall panels (DIN EN 12859); gypsum plasterboard and gypsum fiberboards (DIN 18180 / DIN EN 520 and DIN EN 15283-2); plasters (DIN EN 998-1) of mortar groups CS II, III, and IV; concrete (DIN EN 206); aerated concrete blocks (DIN 4166); lightweight concrete hollow wall panels (DIN 18148); or cement, calcium sulfate, and mastic asphalt screeds (DIN EN 1383 / DIN 18560).

The execution of waterproofing work must comply with the specifications set out in DIN 18534 and the technical data sheet on "bonded waterproofing systems" (Verbundabdichtungen) issued by the German Association for Tiles and Natural Stone (Fachverband Fliesen und Naturstein – FFN). These guidelines must be observed. 

When used in combination with the listed Kiesel adhesive mortars, Kiesel self-adhesive sealing tape/Kiesel sealing tape/Basic sealing tape/Kiesel "light" sealing tape, Kiesel internal/external sealing corners/Basic internal/external corners/Kiesel "light" internal/external corners, as well as Kiesel wall sealing sleeves/Kiesel "light" wall sealing sleeves, the following products are covered by a "General Building Inspectorate Test Certificate" (Allgemeines bauaufsichtliches Prüfzeugnis) issued by the Materials Testing Institute for Construction at the Technical University of Braunschweig:

• Servofix KM-F Plus
• ServoStar® 1500
• ServoStar® 2000 Plus Flex
• Servoflex K-Plus SuperTec
• Servoflex K-Schnell SuperTec
• Servoflex 5 royal
• Servoflex 2.0
• Okapox royal

The substrate must be dry, clean, load bearing and appropriate for wet areas. Prime absorbent substrates with Okatmos® GGS or Okatmos® UG 30. Prime non-absorbent substrates with Okatmos® UG 30.

Apply Okamul DF with a paintbrush, roller or trowel. Dilute to a maximum of 0.5 % with water if necessary. In order to guarantee a secure seal, it is recommended to apply at least one more coat after the first application has dried. To avoid cracking in corners imbed sealing strips (Dichtband) and preshaped inside and outside corner sealers (Dichtecke innen/außen) and "Wall" and "Floor" seal sleeves (Dichtmanschette "Wand"/"Boden") around pipe openings and floor drains into the first application while wet.
All flexible tile and marble adhesives by company Kiesel can be used for installations over Okamul DF. If necessary, use Okamul DZ 18 additive for standard adhesives.
Earthenware tile installations with Okamul NKS may require a curing process of up to 7 days.

At least 1.0 kg/m² for two coats on smooth substrates

Lambskin roller, smoothing trowel, mason's brush, brush

Clean tools with water immediately after application.