Koster KBE Liquid Film - Liquid Bitumen Waterproofing Membrane

Manufacturer guidance

• Substrate can be dry or slightly moist but not wet.
• It has to be free of frost, grease, tar and oil, loose particles, and any bond-inhibiting material.
• Protrusions must be minimized.
• Edges must be broken, (chamfered to approx. 45 degrees). Internal corners and wall/floor junctions must be rounded out with fillets.
• The material can be applied on concrete, plaster, masonry, and bitumen roofing membranes.

Manufacturer guidance

General:

• Stir well before application.
• Clean tools immediately after use with water.
• Clean off dry material with KÖSTER Universal cleaner.

Elastic waterproofing of areas in ground contact:

• Voids, open joints, etc. have to be closed prior to application using, for example, KÖSTER Repair Mortar.
• In wall/floor junctions, on construction joints and especially in areas at risk of cracking, KÖSTER Superfleece or KÖSTER Glass Fiber Mesh has to be embedded into the fresh first layer.
• Prior to backfilling, the coating has to be protected against mechanical damage, for example with KÖSTER Protection and Drainage Sheet 3-400.
• The installation of a suitable drainage system is also recommended.
• Suitable for waterproofing floor areas against rising damp.
• Expose coating to stresses such as movement, water etc., only after the waterproofing layer has completely dried.
• On horizontal areas, two layers of PE-foil are placed as a gliding layer on top of the cured waterproofing layer before screed is installed.

Balconies and terraces:

• KÖSTER KBE Liquid Film is especially suited for waterproofing balconies and terraces.
• Waterproofing drains, around downspouts and gutter connections can be applied in one seamless application without complicated detailing work.
• KÖSTER Superfleece or KÖSTER Glass Fiber Mesh is embedded into the fresh first layer of KÖSTER KBE Liquid Film over the entire area as well as at all connections.
• In cases of extreme joint movement or at wall / floor junctions, KÖSTER BD Flex Tape K 120 is embedded.
• On top of the fully dried coating, two layers of 0.4 mm PE-foil are placed as a gliding layer, followed with a reinforced screed layer thickness of 3 cm min. thickness.

Application of KÖSTER KSK membranes:

• KÖSTER KBE Liquid Film can be used undiluted as primer for KÖSTER cold self-adhesive membranes.
• The primer coat should cover the substrate completely.
• KÖSTER KBE Liquid Film is also used to seal the ends of the KÖSTER KSK membranes.

Area waterproofing:

• KÖSTER KBE can be used undiluted in a thin layer as a primer.
• It is applied with a brush, roller or suitable spray equipment in one coat.
• After the primer has dried, the waterproofing coats are applied.
• KÖSTER KBE Liquid Film can be applied with a roller, brush, trowel, paint brush or with suitable spraying equipment.
• Each coat must completely dry before the next coat can be applied.
• For area waterproofing, apply at least 2, preferably 3 coats.
• Embed KÖSTER Superfleece or KÖSTER Glass Fiber Mesh into the first fresh coat on the whole area.
• Fresh coatings can be protected from rain by applying KÖSTER BE Rainproof.
• Proper drying of the coating can only be warranted if the temperature during application and drying is above + 5 °C.
• KÖSTER KBE Liquid Film can be covered with other materials after 24 hours.

Manufacturer guidance

• Solids content: > 60 % by weight.
• pH-value: 11.0.
• Elongation at break: > 900 %.
• Retraction: > 60 %.
• Viscosity: ca. 8000 mPa*s.
• Application temperature: + 5 °C to + 35 °C.
• μ-value: approx. 13000.
• sd-value: approx. 26 m (at 2 mm dry layer thickness).