Slurry seal coating OTTOFLEX®
Slurry seal coating OTTOFLEX®
OTTOFLEX® Slurry Seal Coating is a high-performance, 1-component, highly polymer-modified cementitious composite sealing compound engineered for demanding professional waterproofing projects. Designed for rapid, crack-free curing, it provides reliable and permanent protection against moisture and water ingress in both interior and exterior environments.
👷♂️ The Master Tiler's Verdict
“When you are tanking a commercial wet room, a high-end residential swimming pool, or an exposed exterior terrace, you cannot afford callbacks due to moisture failure. This polymer-modified slurry gives you incredible workability whether you are brushing, troweling, or spraying it on. It bridges cracks effortlessly, cures without shrinkage cracking, and provides absolute peace of mind up to a 4-metre water column.”
Pro Tip: To avoid clumping during mixing, take approximately 2/3 of the required water, mix with a suitable paddle mixer at approx. 600 rpm, then add the remaining water and let the material mature for 3 minutes before a final thorough mix. Always apply in 2 to 3 wet-on-wet coats depending on your specific load class requirements.
Key Product Characteristics & Benefits
- Universally Usable: Suitable for a wide variety of standard and demanding construction substrates.
- High Crack Bridging Properties: Engineered to accommodate minor substrate movements without compromising the waterproof barrier.
- Waterproof and Permeable to Steam Diffusion: Effectively blocks water under hydrostatic pressure while allowing structural vapour to breathe after curing.
- Resistant to Frost and Aging: Maintains long-term structural integrity against severe weather exposure and freeze-thaw cycles after setting.
- 1-Component & Quick-Curing: Hassle-free single-component powder formulation that mixes easily with water on site.
- Building Material Class B2: Normally inflammable in accordance with DIN 4102-1.
Professional Fields of Application
- Flexible composite sealing under ceramic coverings and natural stone in moisture-prone rooms and commercial wet rooms.
- External waterproofing on balconies, terraces, and arcades (not above used rooms) with a gradient of 1.5% or greater.
- Construction waterproofing for earth-contact components such as exterior cellar walls and supporting walls against ground moisture and non-oppressive water.
- Sealing swimming pools and solid water containers (interior and exterior), officially authorised for water depths up to 4 meters.
- Suitable for stable substrates including gypsum plasterboard, gypsum fibreboards, screed, heated screed, concrete, masonry, cellular concrete, and mortar group II and III plasters.
Standards, Tests & Approvals
- General building inspection certificate (abP) for liquid seals in combination with tiles and board coverings.
- Complies with water action categories W0-I, W1-I, W2-I, and W3-1 for tear class R1-1 in accordance with DIN 18534.
- Complies with water action category W1-B for tear classes R0-B and R1-B and container sites S1-B and S2-B under DIN 18535.
- Conforms to stress categories A and B according to abP, and moisture resistance classes A0 and B0 according to ZDB information sheets.
- Tested for Composite Sealing Plus in accordance with ÖFV Technical Guidance Note 3 issued by the Austrian Tile Association.
- Watertightness tested in accordance with DIN EN 14891, table 1.
- GISCODE: ZP1 | French VOC-emission class: A+.
Technical Specifications & Data
| Technical Property | Specification Value |
|---|---|
| Packaging Size | 20 kg sack (Grey - OFDS-108) |
| Processing Time | Approx. 60 minutes |
| Maturing Time | 3 minutes |
| Processing Temperature | -5 °C to +25 °C |
| Water Requirement (Spatula application) | 180 ml / kg |
| Water Requirement (Brushable) | 220 ml / kg |
| Water Requirement (Sprayable) | 260 ml / kg |
| Consumption (per mm dry layer thickness) | 1.2 kg / m² |
| Minimum Spreading Amount | 2.5 kg / m² |
| Drying Time (at 23°C / 50% RH) | Ready for tile adhesive after 24 hours (fully loadable in 1 to 3 days) |
| Water Loadable | After > 7 days |
| Adherent Tensile Strength | > 1 N/mm² |
| Water Vapour Diffusion Resistance (μ) | 500 |
| Temperature Resistance | -20 °C to +70 °C |
Safety & Technical Documentation
Access complete compliance data and application guidelines directly below:
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