DOBAU®-1KS

DOBAU®-1KS

Single-component plastic-modified thick bitumen coating (PMBC), solvent-free

Description

DOBAU®-1KS is a single-component, plastic-modified thick bitumen coating filled with polystyrene foam (PMBC). The product is used for sealing components in contact with the ground in accordance with DIN 18533. DOBAU®-1KS corresponds to the requirements of DIN EN 15814 PMBC – W1, CB2, C1, R3 in respect to plastic-modified thick bitumen coatings for sealing building structures. A "General test certificate issued by the building authorities" is available for use in transition to structural components made of concrete with high water penetration resistance in accordance with Building Rules List A Part 2 No. 2.48 (abP in accordance with PG ÜBB).

Advantages

  • ready for use
  • thixotropic, meaning up to 7 l/m² can be applied in one operation
  • elastic and bridges cracks
  • high heat resistance
  • highly flexible and elastic, even at cold temperatures
  • high resistance to aging
  • can also be used effectively on slightly damp substrate
  • solvent-free and environmentally friendly

Available packaging

Plastic bucket: 12 l, 30 l

Downloads

Technical datasheet
Download PDF file

Technical info

Application instructions

Requirements to the subsoil

Building areas onto which DOBAU®-1KS is to be applied must be firm, smooth, free of nests, gaping cracks and burrs as well as free of impurities. Unclosed recesses larger than 5 mm, such as mortar pockets, open butt and horizontal joints or outbreaks, must be closed with suitable mortar. Masonry surfaces according to DIN 1053-1, open butt joints to 5 mm and surface profiles or uneven areas of stones must be closed or equalised either by plastering (thin or levelling plaster), sealing slurry or by scratch filling with DOBAU®-1KS. If the effects of water from the negative side, i.e. from the building structure, are to be expected during the construction phase, the substrate must be treated with a mineral sealing slurry (MDS).

Establishing the seal

For better bonding with the substrate, it is necessary to use the primer DOBAU®-Voranstrich E (solvent-free). For processing, the bitumen emulsion is first stirred briefly in the container using a slow running electric agitator together with an anchor stirrer. The material should be applied like plaster onto the treated substrate. DOBAU®-1KS is applied in minimum two layers with or without reinforcement inlay, e.g. with a trowel, spatula, smoother or similar. The first sealing layer must have dried through so that it is not damaged by the work that follows. Inner corners and wall/floor connections must be formed as hollow or sealing fillets. The hollow fillets can be realised with DOBAU®-1KS (maximum radius 20 mm). If hollow fillets are made with other material (e.g. mortar), make sure that the material does not exhibit any capillary water conductivity. In the area of floor/wall connections with protruding floor slab, DOBAU®-1KS must be routed down from the wall area via the floor slab to about 100 mm on the face of the floor slab. DOBAU®-1KS must be spread out to zero when interrupting work. When resuming the work, continue by overlapping. Work interruptions must not be made on building corners, fillets or edges.

Detail formation

The relevant regulations of DIN 18533 Part 3 must be observed for the necessary detail formations, connections to a cross sectional seal, transition to a WU concrete structure, wall base, penetrations as well as expansion joints, in relation to the water penetration class.

Protective layers

Building structures must be provided with an additional protective layer in accordance with DIN 18533. The protective layer may only be applied after the seal has sufficiently dried. The protective layers can be bonded point-by-point with a PMBC (approx. 1–2 l/m²). Materials that could damage the PMBC must not be used for sealing in the area in contact with the ground. Expanded or extruded polystyrene hard foam boards, dimpled membranes with sliding layer or foam glass boards are suitable.

Processing checks

According to DIN 18533-3, the wet layer thickness must be inspected regularly during application. Measuring points should be distributed diagonally (at least 20 measurements per object or per 100 m²). The wet layer thickness must be inspected separately for each layer. The resultant dry layer thicknesses can only be tested destructively.

Weather conditions

At the application of DOBAU®-1KS the ground and air temperatures must be more than 5 °C. The effects of water, rain and frost must be avoided during the processing and drying phase.

Material consumption

Apply in minimum 2 layers. Minimum dry layer thickness: 3 mm; wet layer thickness (incl. 25 % allowance per DIN 18533): approx. 4.0 mm. Applies to water penetration classes W4-E, W1.1-E and W1.2-E.

Cleaning agents

When fresh: water
When set: DOBAU®-SWS Bitumenreiniger, common solvents or benzine; at skin contact hand washing paste

Storage

The PMBC can be stored for at least 12 months in the unopened container. The containers must be kept away from frost. Avoid direct sunlight or strong heat.

Authoritative regulations

  • DIN 18533, Part 1 and Part 3

Products used together

DOBAU®-Voranstrich E

DOBAU®-Voranstrich E

Water-based bitumen primer

Read more

Want to order or have questions?

Get in touch – we'll help you choose the right products, advise on usage and prepare a quote.

Andrius Knystautas

Andrius Knystautas

+370 6 858 5782 andrius@biguma.lt

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