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Weber Saint-Gobain - Official website of the company

webertec EP structural adhesive

webertec EP structural adhesive
webertec EP structural adhesive

Product Benefits

● Adhesive for structural bonding ● Jointing of precast segmental bridge units ● Adhesive for external steel plate bonding ● Adhesive for webertec force carbon plate composite strengthening ● Adhesive for bonding rubber bearing pads for highways and railways

Moisture-tolerant epoxy adhesive for structural bonding applications

Product Features

About this Product

webertec EP structural adhesive is a two-component, bisphenol epoxy resin and polyamine hardener, highly moisture-tolerant structural adhesive for structural jointing and structural strengthening. Used for application thicknesses of 2-10mm.

Conforms with BS EN 1504-4.

Features and Benefits

  • Excellent cohesive bond to prepared surfaces
  • Good adhesion to concrete, steel, timber, glass, rubber and carbon fibre
  • Negligible shrinkage on curing
  • Moisture tolerant for all year round work
  • Fully complies with BA 30/94
    Strengthening of Concrete Highway Structures Using Externally Bonded Plate

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 bond adhesion strength without the surface substrate being carefully prepared to give mechanically sound, clean surface.

Concrete and masonry
The surface must be prepared by mechanical means such as grinding or grit blasting to remove any weak surface laitance or deletrious friable material.

The substrate should have an inherent tensile strength greater than 1·0 N/mm2.

Pull-off tests should be carried out prior to application of the adhesive.

If the substrate is uneven, then the surface shall be re-profiled with a levelling mortar. Check for evenness of substrate.

Timber surfaces should be prepared by sanding and planing with all dust removed under vacuum.

Steel substrates
These should be grit blasted to Swedish Standard SA 21/2, equivalent to BS 7079-A1 and de-greased immediately prior to application. Where corrosion is absent, wire brushing to a clean, bright surface may be adequate. Care must be taken not to polish the rust.


Mix by adding the dark grey hardener to the white resin and mix for 3 to 5 minutes with a low speed drill and spiral mixing head (EPIMR4 100). Mix until a uniform consistency and colour is obtained.

In cold weather it is advisable to store the product unopenend in a warm environment for several hours before mixing.



The mixed adhesive must be placed within its pot life. Apply the adhesive to the prepared substrate with a grooved trowel or by gloved hands. Apply material to both surfaces before joining together.

In some cases, only one face needs to be coated with adhesive, provided that at least 3 mm thickness is applied (e.g. segmental bridge construction).

Plate bonding Push the glued plates onto the glued substrate within the open life of the material.

Apply a hard rubber roller to squeeze the adhesive from both sides of the plate edge and ensure no air voids.

Roller to achieve a bond line of approximately 2 - 3 mm thickness. Remove the surplus adhesive from the sides of the plate.

Setting time

5°CDo not use
10°C80 min.
15°C65 min.
20°C 44 min
25°C31 min.





Clean tools and any uncured adhesive using webertec solvent 3.

Packaging, Health & Safety


webertec EP structural adhesive is available in 5 kg pails with hardener compound recessed in the lid.

Coverage / Yield

Yield 5 kg approximately 2·9 litres.


Thickness of adhesive           kg/m²

2mm                                        3.3

4mm                                        6.7

10mm                                      17.0

Storage and Shelf Life

Shelf life is at least 12 months when it is kept unopened and stored in cool, dry conditions.

Store at between 5°C and 25°C.

Health and Safety

Keep containers closed when not in use.
Operatives are advised to use barrier creams and wear protective clothing including gloves and goggles or glasses.
Any contact with skin should be cleaned with proprietary cleansing cream. If product enters the eye wash with copious amounts of clean water. Seek medical advice if discomfort continues. Only mix and use in well ventilated areas. In the event of fire, use foam, dry chemical or carbon dioxide (CO2) extinguishers. Flash point is in excess of 100°C.

For further information, please refer to the Weber Safe Handling Guide.