Parex Bondcoat UF is a two-part epoxy resin system consisting of a base component containing solventfree epoxide resin, plus a low viscosity liquid hardener. It is applied using a stiff bristle brush to give a thin continuous bond layer to clean prepared surfaces.

Parex Bondcoat UF is used as a bonding primer where the highest bond values are required. The bonder is used for applications of epoxy resin based mortars, screeds and toppings to resin and cementitious substrates, in addition to cementitious mortars and concretes applied to existing cementitious surfaces. The bond values achieved are greater than the tensile strength of high quality concrete. Bond lines are resistant to a wide range of chemicals to complement the applied topping.

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• Features & Benefits
• Application
• Limitations

Features & Benefits

• Uses:
  • High performance bonding primer for epoxy resin based screeds, mortars and toppings to resin and cementitious substrates
  • Provides exceptional bonding of cementitious mortars and toppings
  • Particularly suitable for bonding new cementitious products to old
• Bond values greatly exceed the tensile strength of high quality concrete
• Pre-packed units
• Exceptional adhesion to most construction materials
• Hardens without shrinkage
• Resistant to a wide range of chemicals
• Easily applied with a stiff bristled brush to give a thin continuous bond layer
• Early return to service (light use after 24 hours, full cure at 7 days
• Solvent-free

Application

Ensure that bonding surfaces are free from dust and oily contamination. Suitable preparation should be undertaken to produce a good mechanical key. Steel should be free of rust and flaking mill scale. All substrate surfaces should be essentially dry.

Pour all of the contents of the hardener bottle into the base resin container which has sufficient volume to act as the mixing vessel. Thoroughly mix the two components until a homogenous clear product is achieved using a slow speed drill and paddle. Avoid air entrapment at all times while mixing.

Apply the mixed Parex Bondcoat UF to the prepared surface using a stiff bristle brush. Apply a thin continuous film avoiding the formation of puddling. Apply the topping as soon as the priming coat is completed. If the product is absorbed by the substrate, re-prime the surface before applying the topping.

No special curing practice is required, but product should be protected from rain during application and hardening.

Clean all tools and application equipment with Sika Thinner C Cleaner immediately after use. Hardened / cured material can only be removed mechanically.

Limitations

• Avoid application outside of temperature range (+5 °C min. / +35 °C max)
• Ensure no ponding water is present on the substrate
• Be aware of dew points
• Do not part mix components