BORNIT® Slurry (SM1)

wall | foundation waterproofing | mineral-based | waterproofing slurry
short information
  • mineral sealant slurry
  • accelerated drying
  • high resistance against strong water pressure
  • can be brushed on
Slurry SM1 (system-modul 1)
15 kg / bucket
sufficient for:
EAN code
approx. 6 m²
4 017228 00434 1
36 bucket
approx. 25 kg / m² per cm of layer thickness
storage note
  • store dry, in closed containers
  • can be stored for 12 months

status technical data sheet
28 February 2022

areas of application
Subsequent interior basement waterproofing, shaft waterproofing as well as for any further waterproofing against non-pressing and pressing water from the negative and positive side.

type and properties
BORNIT® Slurry (SM1) is a fast-setting mineral sealing slurry with high resistance to aggressive groundwater and high-water pressure.

  • Leaky areas and individual points are quickly and easily sealed with the method, even if the water is flowing. The success is immediately visible. The seal is made from the negative side, i.e. against the water pressure.
  • The process combines the following effects:
  • 1. Sealing of places against pressing, flowing water.
  • 2. Surface sealing against pressing, flowing water.
  • 3. Silicification of the waterproofing layer and the leaky building material, so that it is compacted and becomes part of the waterproofing.
  • 4. The waterproofing is permanent as it becomes an integral part of the structure.
  • 5. Simple, safe processing and inexpensive.

A stable, firm and clean substrate is the prerequisite for permanent secure waterproofing. Paints and also plasters, which contain lime (also hydraulic lime), screeds, etc., must be removed down to the solid construction material (masonry/concrete). If possible, scrape out joints in the masonry down to approx. 2 mm.
Pre-moisten dry surfaces well multiple times prior to starting application. Holes and open joints should be filled with BORNIT® Sealing Mortar.

Prior to applying the BORNIT® Basement Coating System to aerated concrete, lightweight and heavy concrete blocks (e.g. Poroton), a stable plaster layer of BORNIT® Sealing Mortar must be applied.
Unsuitable substrates:
- Limy plasters
- Paint coats and coatings
- Gypsum-based construction materials

For leak waterproofing:
Firmly rub in BORNIT® Water Stop SB2 until the water is stopped.

For surface waterproofing:
Waterproofing of the leaks alone often is not sufficient, since the water finds other paths and then emerges again in other locations. In order to achieve dry rooms, the surfaces are to be treated as follows:

1. Mix as much BORNIT® Slurry SB1 with water into a plastic, thick and spreadable mass as can be processed within 5 minutes. Spread the slurry onto the substrate with a wide brush or a firm smaller brush (consumption per m² approx. 2.5 kg).
2. Then immediately rub BORNIT® Water Stop SB2 firmly by hand into the still fresh, wet slurry, until the surface is dry. Wear smooth rubber gloves.
(Consumption per m² approx. 1.5 kg)
3. Then, without waiting, brush-on BORNIT® Solidificator SB3 with a clean, wide brush (consumption per m² approx. 0.5 kg).
4. Immediately after that and after about 30 minutes, repeat step 1 (consumption respectively 0.5 to 1.0 kg per m²). In order to avoid tensions, the layers should be applied with a thickness of no more than 4 mm.

Follow-up treatment
In the wall area, apply a rough bonding cast after 24 hours, at the earliest. This is to be prepared as follows:

Dilute BORNIT® Stick Emulsion with water at a ratio of 1:2 and mix with Renovation Plaster until a sprayable consistency is obtained. The rough cast should be applied with a coverage of approx. 50 %. After a further at least 24 hours, apply the water-repellent and thermally insulating Renovation Plaster. The floor is coated with a bonding bridge of BORNIT® Stick Emulsion (diluted with water 1:2), admixed with a cement/sand mixture (1:4). Thereafter, a cement coat must be applied.

Elastic waterproofing of joints and cracks
For waterproofing of cracks, joints, pipe penetrations and other mobile parts in the course of interior waterproofing, proceed as follows.

1. Prior to applying the surface waterproofing, connections or joints, resp., must be chiselled into the masonry or concrete, resp., in the area of the cracks: width approx. 4 cm or more in case of expected strong movement or high-water pressure.
2. Within the course of surface waterproofing, the BORNIT® Basement Coating System also passes through the chiselled out joints. Therewith, a dry surface is achieved.
3. At least 24 hours after application of BORNIT® Basement Coating, the lateral flanks of the joint (only these) are coated with BORNIT® Concrete Primer.
4. After about 3 hours, the joints must be completely filled with BORNIT® Cold Joint Sealant. Possible later movement of the substrate is elastically compensated by the BORNIT® Cold Joint Sealant. No water can penetrate anymore.

approx. 2.5 kg/m²

product data in brief
density at +20 °C
approx 3.00 g/cm³
11.0 - 13.0
The devices must be cleaned with clean water immediately after use.
store dry, in closed containers
shelf life
can be stored for 12 months
GISCODE link comp. A
substances hazardous to health in terms of the ordinance on hazardous materials
cement-containing products, low in chromate
hazard class according to ADR
Melting point
+1250 °C
Bulk density
1.6 g/cm³

health and fire protection, occupational safety
To ensure safe handling of the product, the physical, safety, toxicological and ecological information provided online, the information in the current safety data sheet and the additional information on the label must be read and followed before purchasing or using the product! The applicable regulations, ordinances and laws must be complied with.

In case of doubt, please contact the BORNIT® application technology department or the BORNIT® service hotline on +49 375 2795 123.

The products must be stored dry and in sealed containers, storable up to 12 months.

disposal note
Only empty containers for recycling. Material residues can be disposed of in accordance with AVV-ASN: 170101 (concrete).

The above information replaces all previous technical information about the product. Thus, this information is no longer valid. The details have been compiled according to the latest state of application technology. Please observe, however, that, depending on the state of the construction object, deviations from the method of application suggested in the datasheet may be required. Unless agreed otherwise in individual contracts, any information contained in the datasheet shall be non-binding and thus does not represent an agreed product constitution. We reserve the right to any changes in the information contained in this datasheet anytime.
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Hazard pictograms

signal word

Hazard-determining components for labelling

H315: Causes skin irritation.
H318: Causes serious eye damage.
H335: May cause respiratory irritation.

P101: If medical advice is needed, have product container or label at hand.
P102: Keep out of reach of children.
P280: Wear protective gloves/protective clothing/eye protection/face protection/hearing protection.
P305 + P351 + P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
P310: Immediately call a doctor.
P501: Dispose of contents/container to a suitable recycling or disposal facility.

recommended, personal protective equipment: