Nitobond EP Epoxy Bonding Agent

High strength epoxy bonding agent for new to old concrete and primer for repair mortars to concrete substrates.

Uses:

For bonding fresh wet cementitious materials to existing cementitious surfaces. For use on horizontal or vertical surfaces where mortar or concrete can be supported by formwork. The long ‘open’ life makes it suitable for use with formwork or where additional steel reinforcement has to be fitted.The product is ideal for roads, bridges, pavements, loading bays and factories, and for bonded or granolithic floor toppings. Nitobond EP is equally suited to internal and external applications.Nitobond EP may also be used as part of a repair system where a substrate/repair barrier is required or where the repair/ substrate is likely to become immersed, permanently wet or damp subsequent to the completion and cure of the repair.

Advantages:

• • High strength adhesion - exceeds that of the tensile strength of the host concrete
  • Exhibits high mechanical strength
  • Can be applied on to dry or SSD damp substrates
  • Solvent free - can be used in enclosed locations

Description:

Nitobond EP is based on solvent-free epoxy resins containing pigments and fine fillers. It is supplied as a two-component material in pre-weighed quantities ready for on-site mixing and use.The ‘base’ component is white and the ‘hardener’ component is black, providing visual evidence (uniform grey colour) that adequate mixing has been achieved.

Application instructions

Preparation

Clean the surface and remove any dust, unsound material, plaster, oil, paint, grease, corrosion deposits or algae. Roughen the surface and remove any laitance and expose aggregate by light scrabbling or grit-blasting.Oil and grease deposits should be removed by steam cleaning, detergent scrubbing or the use of a proprietary degreaser. The effectiveness of decontamination and soundness of the substrate should then be assessed by a pull-off test.

Mixing:

Any steel reinforcement and formwork should be prepared, cut to size and shape, and made ready for assembly before mixing commences.Care should be taken to ensure that Nitobond EP is thoroughly mixed. The ‘hardener’ and ‘base’ components should be stirred separately before mixing to disperse any settlement. The entire contents of the ‘hardener’ tin should then be poured into the ‘base’ tin and the two materials thoroughly mixed using a suitable slow-speed heavy duty drill and mixing paddle for 2 minutes until a fully uniform colour is obtained. The sides of the tin should then be scraped and mixing should continue for a further 2 minutes.

Application:

Nitobond EP should be applied as soon as the mixing process has been completed. It should be brush or spray applied to the prepared surfaces. Spray application requires a heavy duty airless spray machine such as Graco airless spray fitted with 19 -20 thou tip. Refer to Graco for specific advice.The new concrete or screed should be applied to the coated substrate after the Nitobond EP has become tacky and within 90 minutes at 20°C, ie. while the Nitobond EP is still tacky. If the Nitobond EP is allowed to become tack-free, a second coat will be required. This second coat must be applied the same day as the first coat otherwise the first coat will need to be mechanically removed.As soon as the Nitobond EP has been applied, any required steel reinforcement and/or formwork should be erected and fixed securely in place.When required to form a barrier between chloride contaminated concrete and Renderoc repair material, the prepared concrete should be primed with Nitobond EP and allowed to cure for 8 to 24 hours.This coating should be imperforate and any unfilled voids (blow-holes) should be filled with Nitomortar AP before proceeding. Apply a second coat of Nitobond EP and leave for 30 minutes before the Renderoc is applied to the tacky surface.

Coverage:

Nitobond EP: 4 - 5 m2 /litre

Supply:

Nitobond EP Epoxy Bonding Agent is supplied in 1.5 litre and 6 litre 2 component packs.

Storage:

Nitobond EP Epoxy Bonding Agent has a shelf life of 24 months from date of manufacture if kept in a dry store in the original unopened packs. If stored at high temperatures, the shelf life may be reduced.Facebook Page Visit