Weber 20 Extra | Professional Waterproofing Additive for Mortars
Weber 20 Extra
Weber 20 Extra is a specialty additive designed to improve the waterproofing performance and strength characteristics of site-mixed plasters, screeds, concrete, and similar mortar systems. Its ready-to-use formulation requires no additional preparation and can be easily incorporated into the mixing process.
Advantages
- Ready-to-use and easy to apply
- Enhances the waterproofing performance of mortars
- Improves overall mortar strength and durability
- Ideal for mortar systems requiring both water resistance and high mechanical performance
Areas of Use
Weber 20 Extra can be used in all structures exposed to water or requiring enhanced moisture resistance, including:
- Building foundations
- Basements
- Retaining walls
- Culverts
- Tunnels
- Swimming pools
- Terraces and balconies
- Concrete, plaster, and screed applications
Application Conditions
- Ambient temperature: +5°C to +35°C
- Sand used on site must be clean.
- Cement must be fresh and free from deterioration.
Instructions for Use
- Shake the product thoroughly before use.
- Add Weber 20 Extra to clean mixing water and stir well.
- Depending on site conditions and the moisture content of the sand, the amount of water may be adjusted.
- Add the prepared additive solution to the dry mortar mix to ensure uniform distribution throughout the mixture.
Important: Lime must not be added to the prepared mortar, as it may negatively affect the product’s chemical performance.
Recommended Dosage
- 0.6% of the cement weight
- Example: 0.6 liters per 100 kg of cement
Actual consumption may vary depending on aggregate type, cement type, and ambient conditions.
Storage Information
| Property | Value |
|---|
| Packaging | 5 L and 20 L plastic containers |
| Color | White |
| Shelf Life | 2 years |
| Storage Conditions | Original unopened packaging, protected from frost, stored between +5°C and +35°C |
Safety Precautions
- Wear appropriate gloves, protective goggles, and a mask during handling and application.
- Avoid contact with skin and eyes.
- In case of contact, rinse thoroughly with plenty of water and seek professional medical advice if necessary.
- Refer to the Safety Data Sheet (SDS) for detailed health and safety information.
Frequently Asked Questions
What is Weber 20 Extra used for?
It improves the waterproofing properties and strength of plaster, screed, and concrete mortars.
What is the recommended dosage?
The recommended dosage is 0.6% of the cement weight.
At what temperatures can it be applied?
The recommended application temperature range is +5°C to +35°C.
What types of structures is it suitable for?
It can be used in foundations, basements, tunnels, swimming pools, retaining walls, and other concrete, plaster, or screed applications exposed to water or moisture.
Can lime be added to the mortar?
No. According to the technical data sheet, lime must not be added to the prepared mortar, as it may alter the product’s chemical properties and performance.