This website uses cookies to ensure that we give you the best experience on our website.
By continuing to browse the site you are agreeing to our use of cookies. To find out more click here

Weber Saint-Gobain - Official website of the company

webertec force EP bonding adhesive

webertec force EP bonding adhesive
webertec force EP bonding adhesive

Product Benefits

● Bonding adhesive for carbon fibre, glass fibre sheets and aramid sheets

● A component of webertec force composite strengthening system

Moisture-tolerant epoxy bonding adhesive for webertec force composite sheets

Product Features

About this Product

webertec force EP bonding adhesive is a two-component epoxy resin adhesive for concrete and masonry surfaces. It is used to structurally adhere webertec force composite sheets and transfer all loads into the fibre composite.

Conforms with BS EN 1504-4.

Features and Benefits

  • High initial adhesion to bond composite sheets
  • Moisture tolerant, allowing work to proceed on site
  • Once hardened is resistant to water, diluted acids, saline solutions and oils
  • Resistant to constant and varying temperatures
  • Allows transfer of stress to the individual fibres in the composite sheet
  • Easy to mix and apply

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


Send or download the documents

You can either send the documents to an email address, or download it

Preparation & Application


No adhesive 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 webertec 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 be unsuitable for bonding.

Minimum fctm values shall be:
1 N/mm2 webertec force carbon sheet
1 N/mm2 webertec force aramid sheet
1 N/mm2 webertec 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.

Once prepared, the surface shall be primed with one coat of webertec force EP primer. The bonding adhesive must be applied whilst the primer is still tacky.

Do not let the primer cure before applying the adhesive.


Use a clean, dry plastic bucket or container for mixing. Pour in the resin and slowly add the hardener component.
Alternatively mix within the tin.
Mix thoroughly to an even colour and consistency using a slow-speed drill and spiral head mixer.


Immediately after mixing, webertec force EP bonding adhesive 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.

For application of composite sheets, see individual data sheets.

Pot life and Cure time
The effective workable time of mixed webertec force EP bonding adhesive 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 5°C 10°C 20°C
Pot life         6 hr  3 hr   1 hr

Packaging, Health & Safety


5.5 kg pack yielding 5 litres

Coverage / Yield

2 - 3 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.