Force-fit sealing of cracks in screeds and concrete substrates

Excessive shrinkage during drying and hardening, overstrain or hindered expansion due to temperature often lead to cracks of screeds or concrete substrates. In order to restore the load-bearing capacity of such cracked substrates, the cracks must be sealed in a force-fit manner. Only products that are especially suitable for this purpose should be used here. weber.floor 4715 (quick-curing EP primer) or weber.floor Blitzharz easy (quick-curing crack-filler and glue resin) offer the necessary safety for sealing cracks due to its high compressive, flexural and bonding strengths.

Simple & safe to the goal

  1. Preliminary works

    1. Open the crack up to 2/3 the screed depth and make cross-cuts of approx. 25 cm length crosswise to the crack line.

  2. 2. After thorough removal of dust and other adhesion-impairing components, the steel anchors weber.floor Wellenverbinder (70 x 6 mm) are inserted into the cross-cuts.

  3. Application

    1. Fill flush with the surface by pouring weber.floor 4715 or weber.floor Blitzharz easy into the crack line and the cross-cuts; if necessary, repeat the process.

  4. 2. If necessary, fill cavities with filled (with silica sand) or thickened (with thixopropic agent) epoxy resin. Scatter dry quartz sand (approx. 0.3 - 0.8 mm) in excess over the still tacky resin layer for bonding purpose.

  5. 3. After complete curing, remove the loose excess sand completely. If necessary, the screed or concrete surfaces can be levelled, e.g. with a smoothing mortar, such as weber.floor 4031 prior to laying of floorings.

  6. Laying of floor covering

    A subsequent laying of floorings can be carried out with the weber.floor adhesives.

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