About this product
weber.rend stipple is a cementitious polymer-modified material. The powder blend includes an integral bonding agent so that it requires only the addition of clean water on site.
Features and Benefits
- Equalises suction on mixed backgrounds
- Provides excellent suction control across both high and low suction substrates
- Resists the penetration of external water to improve the weather resistance of rendering systems
- Quality controlled and factory blended to give a consistently high quality product
- Easy to apply by hawk and trowel
Proprietary mix, designed to be used as an adhesive stipple pretreatment as described in BS EN 13914-1.
Suitable specification clauses for dealing successfully with most types of substrates are available from our Technical Services Department.
BS EN 13914-1 Design, preperation and application of external rendering and internal plastering - Part 1: External rendering and BS 8000-10, Workmanship on building sites. Code of practice for plastering and rendering should be followed at all times.
Do not apply to gypsum plaster or previously painted surfaces.
The quality of application of this material depends on suitable operative skills and their familiarity with the product .
Restrictions on weather conditions during application and curing must be respected.
Sound trade practices and printed instructions must be followed.
Good access and appropriate protection must be provided.
All surfaces must be sound, clean, dry and free from any material which may impair adhesion.
Scaffolding must be independently tied to allow uninterrupted application. Any faults in the structure, particularly those which may lead to moisture penetration, must be rectified.
Mask around the areas where material is to be applied. Masking tape must be removed before the material has dried out.
Mixing and application can be messy. Spillage stains are difficult to remove so: protect vulnerable areas carefully; to facilitate clearing don't mix too much material at one time; wear protective clothing particularly gloves.
Thoroughly mix weber.rend stipple with clean water at the rate of 5 - 5.5 litres of water per bag in a plastic container using a paddle mixer attachment.
Stipple coating of designated areas is required in order to produce a mechanical key on smooth surfaces or where rendering has been removed and the brick joints are flush, or to provide a stand-off for weber expanded metal lath.
weber.rend stipple is polymer modified for maximum bond to the substrate and should be stipple textured to a bold, peaked surface the rougher, the better.
Apply 2 - 3 mm thick to prepared surface with a hawk and trowel. Immediately after coating, fill a textured roller and pull down over the surface of applied material in one pass to create a stipple effect.
It is important that the final texture achieved, is a deep, heavy stipple finish.
Allow to fully dry and shrink. The drying period will vary according to weather conditions.
Do not apply:
- If frost is forecast within 24 hours of use
- In damp/wet conditions
- In temperatures below 5°C or above 30°C
- On elevations in direct sunlight or where the substrate is hot
Coverage / Yield
At 2 - 3 mm thickness the coverage is approximately 5 kg/m2.
Note: This estimate takes no account of wastage and will vary according to the type of substrate.
Allowance must be made for extra material required on high suction or uneven substrates.
Storage and Shelf life
When stored unopened in a dry place at temperatures above 5°C, shelf life is 12 months from date of manufacture.
Health and Safety
Contains cement (Contains chromium (VI). May produce an allergic reaction). Harmful by inhalation. Irritating to eyes and skin. Keep out of the reach of children. In case of contact with eyes, rinse immediately with plenty of water and seek medical help. After contact with skin, wash immediately with plenty of soap and water. Wear suitable protective clothing, gloves and eye/face protection.
For further information, please request the Material Safety Data Sheet for this product.
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.
Tel: (01525) 722110
Fax: (01525) 718988
Sales, England and Wales
Tel: (01525) 722100
Fax: (01525) 718988
Tel: (0141) 445 0121
Fax: (0141) 445 0122
Tel: (028) 9335 2999
Fax: (028) 9332 3232