About this product
weber.tec aquapel WR is a solvent-based, hydrophobic impregnating agent based on a solution of silane resin. weber.tec aquapel WR penetrates into the pores of the surface being treated, forming a silicone resin in situ, and as a consequence, imparts water-repellent properties to most external building surfaces. It is not a film-forming material and so will not affect the appearance or water diffusion capacity of the substrate.
weber.tec aquapel WR penetrates into the concrete, increasing the interfacial surface tension and significantly reducing penetration of water and water-borne contaminants, especially de-icing and marine salts.
Features and Benefits
- One-coat application
- Easy to apply by brush, roller or non-atomising spray
- Minimal effect to surface appearance
- Protects against ingress of waterborne ions (chlorides and sulphates)
- Improves freeze/thaw resistance of treated surfaces
- Reduces susceptibility to corrosion of reinforcement
- Allows treated surface to breathe
Technical data
Preparation
Surfaces must be thoroughly dry, clean, free from any contamination including oil, dirt, dust etc. and sound before the treatment is applied. New concrete should be at least 14 days old and all traces of laitance, shutter release or curing membrane should be removed and the surface allowed to dry out thoroughly.
Old, weathered surfaces should be wire brushed to remove lichen, algae, dust and any loose or flaky material. For large areas, water jetting or grit blasting may be effective. After applying water, allow at least 3 days of dry, warm weather (minimum 15°C) or dry by appropriate means such as controlled flame gun or propane torch and make good all cracks and spalled surfaces before applying the material.
NB: Do not use over weber.cem fairing coat or polymer-modified renders.
Application
Apply only in dry weather and in wellventilated conditions. Surfaces must be thoroughly dry.
Do not apply with an atomising spray, to wet or damp surfaces or at temperatures below 3°C.
Apply weber.tec aquapel WR generously by brush, non-atomising spray or roller. Do not brush out. Drying time at 20°C will be approximately 2 hours.
A thorough, one-coat application will often be sufficient, but for optimum performance in exposed locations and in areas which are liable to ponding or flooding for short periods, the material should be applied to refusal over a period of time, allowing it to soak well into the concrete, at a rate of 3 - 6 m2 per litre.
On less exposed walls or soffits not subject to standing water, an application rate of 10 - 15 m2 per litre will give good hydrophobic properties.
Special note
In good, dense concrete it has been found that weber.tec aquapel WR (or any other silane) does not penetrate more than about 1 mm, and at this level of penetration the silicone resins formed in situ are not particularly durable to weathering. By applying a coat of weber.tec acrylic sealer over a weber.tec aquapel WR treated substrate, the silicone resin formed near the surface is protected by the excellent weathering resistance of the acrylic resin film. In permeable concrete or masonry the penetration of weber.tec aquapel WR will be greater. With deeper penetration, it is more likely that the long term water repellency will be maintained without protection.
EU VOC regulations 2008
EU limit for weber.tec aquapel WR (cat A/h):
680 g/l (2007)/680 g/l (2010). weber.tec aquapel WR contains <680 g/l VOC.
Cleaning
Clean all brushes and tools with weber.tec solvent 1 immediately after use.
Coverage / Yield
Exposed locations
Approximately 3 - 6 m2 per litre.
Sheltered locations
Approximately 10 - 15 m2 per litre.
Storage and Shelf life
Store in a cool, dry place above 5°C.
Shelf life of unopened container in correct storage conditions is at least 12 months.
Once opened, use the material within 2 weeks. Replace lid immediately after use.
Health and Safety
Contains low boiling-point naptha (white spirit).
Flammable: flash point 36°C.
Harmful by inhalation.
Irritating to eyes and skin.
Wear suitable gloves and eye/face protection.
After contact with skin, wash immediately with soap and water.
In case of contact with eyes, rinse immediately with plenty of clean water and seek medical attention.
For further information, please request the Material Safety Data Sheet for this product.
Technical services
weber's Customer Services Department has a team of experienced advisors available to provide on-site advice both at the specification stage and during application. Detailed specifications can be provided for specific projects or more general works. Site visits and on-site demonstrations can be arranged on request.
Technical helpline
Tel: (01525) 722110
Fax: (01525) 718988
Sales Contact
weber products are distributed throughout the UK through selected stockists and distributors. For UK sales enquiries and overseas projects, contact Weber's Sales office.
Sales office
Tel: (01525) 722100
Fax: (01525) 718988
