About this product
weber.tec force EP primer is a two-component epoxy resin primer for concrete and masonry surfaces. It is used to seal and stabilise prepared surfaces prior to bonding fibre sheets for structural strengthening.
Features and Benefits
- Moisture tolerant primer allowing work to proceed on site
- Develops excellent bond strength to prepared substrate
- Easy to mix and apply
- Will stabilise surfaces allowing work to proceed on marginally weak surfaces
Technical data
Preparation
No primer will develop full adhesion to the surface of the substrate without the substrate being carefully prepared. The substrate should be clean and mechanically sound to receive the primer.
When bonding weber.tec force composites to concrete it is important to check the tensile bond strength fctm of the concrete surface.
A high-strength concrete may have a poor quality surface with a low tensile bond strength and could be unsuitable for bonding.
Minimum fctm values shall be:
1 N/mm2 weber.tec force carbon sheet
1 N/mm2 weber.tec force aramid sheet
1 N/mm2 weber.tec force glass sheet
Tensile bond pull-off tests shall be conducted after the surface has been prepared using light grit blasting or grinding.
Old concrete may be contaminated with oils, grease or salts and these must be removed prior to priming.
New concrete should be cured for at least 14 days using efficient curing techniques. If a spray-on curing compound has been used, this must be removed by light grit blasting prior to priming.
Mixing
Use a clean, dry plastic bucket or container for mixing. Pour in the resin and slowly add the hardener component. Mix thoroughly to an even colour and consistency.
Small quantities can be mixed by hand using a flat bladed knife. Larger amounts should be mixed using a slow-speed drill and spiral head mixer.
Application
Immediately after mixing, weber.tec force EP primer should be applied by brush or roller to the prepared surface.
Apply to a uniform, thin coat and brush into the surface. Avoid material running down the substrate.
Pot life and cure time
The effective workable time of the mixed primer is comparatively short when left in the mixing vessel, i.e. 20 minutes at 20°C.
The pot life can be extended by pouring the mixed material into a shallow tray to dissipate the heat created during the polymerisation hardening phase.
Temperature 7°C 10°C 20°C
Pot life 10 hr 6 hr 2 hr
EU limit for weber.tec force EP primer (cat A/j):
weber.tec force EP primer contains <200 g/l VOC.
550 g/l (2007)/500 g/l (2010).
Coverage / Yield
3 - 4 m2/litre per coat.
Storage and Shelf life
Shelf life is at least 12 months when kept unopened in correct storage conditions in a cool, dry area.
Health and Safety
Contains epoxy constituents. Refer to information supplied by manufacturer (see Material Safety Data Sheet).
All skin contact with epoxy resin products should be avoided. Barrier creams should be used and operatives should wear protective clothing including gloves. Working areas should be well ventilated.
The hardener content is alkaline and labelled as corrosive. The resin content is labelled as an irritant. The flash point of all components is in excess of 100°C. In the event of fire use foam, dry chemical, carbon dioxide (CO2) or water fog extinguishers.
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
