About this product
An acrylic primer and admixture for use with cement-based adhesives
As a performance-enhancing admixture for weber.set WF and weber.set rapid, when tiling onto:
- Low-porosity substrates or tiles
- Wooden floors
- Green screeds
- Heated floors
As a surface treatment:
- Priming porous or dusty surfaces prior to tiling
- Sealing gypsum based substrates prior to the application of a cementitous product
Features and Benefits
▲ Manufactured under BSI Quality Assurance Scheme ISO 9001
▲ Allows standard adhesives to be used:
With impervious tiles and substrates
Where limited flexibility is required
▲ Used as a primer for areas that are likely to become wet (e.g. showers) and on wood
▲ Supplied ready for use
Technical data
Constraints
Does not act as a waterproofing system.
Should not be used in grouts.
Preparation
Ensure that the surface is clean and sound.
Ensure that the surface is free from grease or other contamination.
Mixing
Shake the bottle and then pre-dilute weber AD250 as recommended below, before use.
Application
As an admixture where movement is expected: use weber AD250 un-diluted and mix with the powder as recommended on the bag, but note that the mixing ratio may change slightly.
As an admixture for bonding onto impervious tiles or substrates: predilute one part weber AD250 with two parts of clean water, and then mix with the powder.
As a primer for porous or dusty substrates: pre-dilute one part weber AD250 with two parts of clean water, and then apply to the surface with a brush, sponge or roller.
As a sealer for gypsum based surfaces (e.g. plaster) prior to the application of a cementitious adhesive: pre-dilute one part weber AD250 with one part of clean water, and then apply to the surface with a brush, sponge or roller, making sure that the surface is fully covered. For very porous surfaces a second coat may be required.
Storage and Shelf life
When stored airtight in a cool, dry place at temperatures above 5°C and protected from frost, shelf life is 12 months from date of manufacture.
Health and Safety
Essentally non-hazardous.
For full information on Health and Safety, please see inside back cover.
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) 722137
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
