Weberdry SS-8 Extra
Waterproofing plays a critical role in ensuring the durability and longevity of buildings, especially in wet areas and exposed outdoor spaces. Balconies, bathrooms, terraces, and swimming pools are constantly exposed to water, moisture, and temperature fluctuations, requiring reliable and flexible waterproofing solutions.
Weberdry SS-8 Extra is a cement-based, two-component waterproofing mortar designed to provide long-lasting protection beneath ceramic tile installations in both interior and exterior applications.
What is Weberdry SS-8 Extra?
Weberdry SS-8 Extra is a polymer-modified, cement-based, two-component, fully elastic waterproofing mortar.
Developed in accordance with TS EN 14891, it is classified as CMO1P and offers crack-bridging performance even at low temperatures.
These characteristics make it an ideal solution for waterproofing beneath ceramic coverings in both indoor and outdoor environments.
Areas of Application
- Bathrooms, toilets, and kitchens
- Balconies and terraces
- Private swimming pools
- All areas requiring waterproofing beneath ceramic tiles
- Suitable for both interior and exterior applications
Suitable Substrates
- Cement-based renders and screeds
- Fair-faced concrete surfaces
- Existing ceramic coverings (when primed with weber.prim TG 5)
Note: Technical evaluation is recommended before application on other substrate types.
Surface Preparation
Proper surface preparation is essential for successful waterproofing:
- The substrate must be clean, damp, sound, and level.
- Holes, cracks, and surface defects should be repaired at least 24 hours before application.
- Vertical and horizontal corners should be chamfered to ensure waterproofing continuity.
- Highly absorbent surfaces should be pre-moistened.
These steps improve both waterproofing performance and system durability.
Application Details
Mixing Ratio
- Add 25 kg of powder component to 10 kg of liquid component.
- Mix with a low-speed mixer for 2–3 minutes.
- Allow the mixture to rest for 2 minutes and mix again before use.
Application Method
- Apply using a brush or trowel.
- Apply a minimum of 2 coats.
- Each coat should be applied perpendicular to the previous one.
- Wait at least 6 hours between coats.
Consumption
- Approximately 3.5–4.0 kg/m² for a total thickness of 2 mm.
- Consumption may vary depending on substrate absorption and application thickness.
Key Advantages
- Reliable waterproofing for wet areas and terraces
- Allows faster transition to ceramic tile installation
- Fully elastic structure suitable for demanding conditions
- Easy and practical application
- Crack-bridging capability at low temperatures
These advantages make Weberdry SS-8 Extra a preferred solution for both residential and commercial projects.
Important Notes
- Not suitable for wood, metal, or plywood surfaces.
- Not designed for negative water pressure applications.
- Do not add water or any foreign materials to the mixture.
- Expansion joints should be treated using appropriate waterproofing tapes.
- Newly applied surfaces should be protected from external influences for at least 3 days.
Conclusion
Thanks to its fully elastic structure, two-component formulation, and compliance with TS EN 14891, Weberdry SS-8 Extra provides long-lasting waterproofing for balconies, terraces, and wet areas. When applied correctly on properly prepared surfaces, it effectively protects building elements against the harmful effects of water.
Frequently Asked Questions (FAQ)
Where can Weberdry SS-8 Extra be used?
It is suitable for waterproofing beneath ceramic tiles in bathrooms, kitchens, balconies, terraces, and private swimming pools.
How many coats should be applied?
A minimum of two coats should be applied, with at least 6 hours between coats.
When can ceramic tiles be installed?
Ceramic installation can begin after waiting at least 1 day following the waterproofing application.
Can it be used against negative water pressure?
No. Weberdry SS-8 Extra is not suitable for negative water pressure applications.