Sikafloor 400N Elastic- Highly Elastic Polyurethane Waterproof Membrane
Sikafloor-400 N Elastic is a one-component, highly elastic polyurethane waterproofing membrane designed for exposed areas requiring durable waterproofing, crack bridging and weather resistance. Its UV-resistant, non-yellowing formulation makes it suitable for a range of exterior pedestrian and waterproofing applications.
Key Benefits
- Highly elastic polyurethane membrane with excellent crack-bridging properties
- Provides durable waterproofing for exposed and pedestrian areas
- UV resistant and non-yellowing for long-term exterior performance
- Weather and abrasion resistant for demanding outdoor applications
- Suitable for heavy foot traffic and light to medium mechanical exposure
- Slip-resistant finishes can be incorporated where required
Applications
Sikafloor-400 N Elastic is suitable for:
- Exposed roof decks and terraces
- Balconies and podium decks
- Gutters, flashings and walls
- Footbridges and stairways
- Areas subject to heavy foot traffic
- Applications with light to medium mechanical exposure
Standard colour: Stone Grey RAL 7030
Other colours availble upon request on a Made To Order basis: Koala Grey N45, Light Grey RAL 7035, Grey White RAL 9002, Slate Grey RAL 7015, Dusty Grey RAL 7037, Window Grey RAL 7040, Traffic White RAL 9016, Dahlia Yellow RAL 1033.
Please speak to us for other colours.
For more information about the product please refer to Sikafloor-400N Technical Data Sheet
Packaging
18 kg units - 11.25 litres
APPLICATION INFO
Ambient air temperature: +10 °C min. / +30 °C max.
Relative air humidity:
- 80 % r.h. max.
- 35 % min. (below +20 °C: 45 % min.)
Dew point:
- Beware of condensation!
- The substrate and uncured floor must be at least 3 °C above dew point to reduce the risk of condensation or blooming on the floor finish.
Substrate temperature: +10 °C min. / +30 °C max.
Substrate moisture content:
- < 4 % pbw moisture content.
- Test method: Sika®-Tramex meter, CM - measurement or Oven-dry-method.
- No rising moisture according to ASTM (Polyethylene sheet).
- Use Sikafloor 161 for moisture to 6%pbw
Pot Life:
The material in opened containers should be applied immediately. With open containers surface film formation will happen within 1-2 hours. High temperatures and high air humidity will accelerate curing significantly.
Sikafloor 400N Elastic Datasheets
Sikafloor 400N Elastic - Sika's Website
Colour accuracy disclaimer: We have taken care to display the most accurate visuals of our products. However, we are not responsible for the colour accuracy of the device you are viewing our swatches on. These variations arise due to different computer monitors and devices (make, model and technology, as well as resolution, contrast and brightness control settings) in much the same way a scan will differ from an original image and a colour photocopy. Furthermore, coatings can exhibit variation in perceived colour depending on gloss level and application method. If you require a very specific colour match, please make your selection via actual swatches and colour boards available at our showroom.
Product Disclaimer: Ensure you read all product, technical and safety data sheets prior to application as liability falls on the applicator. All products must be applied in accordance with manufacturer’s recommended method.

