Waterproofing Materials



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short info

Cement-bound, rigid sealing slurry for surface seal of buildings, for sealing water containers made of shrinkage-free concrete  substrates, for post-construction sealing of interior basement walls (negative side), with capillary blocking and crystallizing  substances, for vertical and horizontal surfaces.


4 017228 004570 6800000361 25 kg 40 bags
approx. 2 - 4 kg/m² depending onlayer thickness
  tests / CE declaration of performance
LEISTUNGSERKLÄRUNG - gemäß Anhang III der Verordnung (EU) Nr. 305/2011Prüfzeichen BORNIT-Dichtungsschlämme
BORNIT® Slurry SF - 25 kg

detailed information

Areas of application
BORNIT® Slurry SF is used for waterproofing horizontal and vertical surfaces made of concrete, masonry or cement plaster. The product can be used for sealing of walls and for tank sealing.
Sealing with BORNIT® Slurry SF must only be applied to building structures, where any formation of cracks is not to be expected.

Type and properties
BORNIT® Slurry SF is a cementitious, hydraulically reacting powder with capillary blocking and crystallising agents for mineral waterproofing of building structures against soil moisture, seepage water and pressing water. BORNIT® Slurry SF can be used on the negative side (water penetrating from the rear) as well as on the positive side (side facing the water).
The rigid seal achieves good resistance to chemical and mechanical stresses. BORNIT® Slurry SF is free from soda and chlorides and is sulphate resistant.

Product advantages
• Waterproof after drying out
• Environmentally friendly as it is solvent-free
• Vapor diffusion tight
• Easy to process

The mineral substrate must be clean, firm and free from separating substances, oils and greases. Voids and depressions must be removed. Masonry must be fully grouted. The substrate must be moistened prior to application. Standing water must be removed. Dusty and salt-damaged substrates must be primed with BORNIT® Basic Primer. Rigid mineral sealing slurries are not capable of bridging crack formation. Therefore, it must be ensured that no crack movements occur in the substrate.

For processing BORNIT® Slurry SF, in principle, the current “Guideline for planning and execution of waterproofing of building components with mineral sealing slurries” must be observed.

Mix BORNIT® Slurry SF with clean tap water into a smooth, spreadable compound. The powder is added to the water in portions under stirring.

Mixing ratio:
Mix the 25 kg bag contents with approx. 8 l of tap water.
Mix the 25 kg bag contents with approx. 6 l of tap water plus 1-2 kg of BORNIT® Stick Emulsion.
Adding BORNIT® Stick Emulsion to the mixing water increases the water retention capacity and prevents burning up of the slurry in warm weather.

Apply the slurry with a wide, firm brush onto the plaster or concrete in at least 2 coats. Between applications of the individual coats, at least 3 hours, at most 24 hours should pass.
The provisions of DIN 1045 must be complied with, i.e. avoidance of heat, frost and strong wind during execution and at least 24 hours thereafter. Keeping the applied layer moist can be omitted, when at least 15 % of BORNIT® Stick Emulsion were added to the mixing water.

Combined waterproofing:
BORNIT® Slurry SF can be applied directly under thick bitumen coatings (BORNIT® 1C and 2C Thick Bitumen Coating, BORNIT® Profi 1C Express, BORNIT® 2C Flex Thick Bitumen Coating, BORNIT® Profi Hybrid 2C, BORNIT® Mineral Flex 2C). This pre-treatment reduces the risk of blistering in the polymer-modified thick coating on porous substrates and excludes the risk of water ingress at problematic wall/floor connections. Apply BORNIT® Slurry SF directly onto the fully grouted and void-free masonry. After a drying period of min. 24 hours, the thick bitumen coating is applied.

Negative-side waterproofing:
Brittle, loose joints must be cleaned and closed flush with the surface with BORNIT® Sealing Mortar. Following thorough hardening of BORNIT® Sealing Mortar, the surface to be waterproofed is primed with BORNIT® Basic Primer (consumption: min. 120 g/m², for highly absorbent substrates up to 250 g/m²). After a waiting period of at least 30 minutes, the first coating with BORNIT® Slurry SF is applied (consumption: 1.5 kg/m²). The second waterproofing layer of BORNIT® Slurry SF is applied after approx. 30 to 60 minutes (when the first layer of the waterproofing cannot be damaged by the application of the second layer anymore). Here, consumption likewise amounts to 1.5 kg/m². Final bonding takes place with a last application of BORNIT® Basic Primer (consumption: min. 250 g/m²).

Combined waterproofing    Approx. 1.5 kg/m² (1 coat)
Negative-side waterproofing    Min. 3 kg/m² (2 coats)

System products
BORNIT® Basic-Primer
BORNIT® Stick Emulsion
BORNIT® Sealing Mortar

The product must be stored dry, in closed containers. In originally sealed containers storable for 12 months.

Health and fire protection, occupational safety
For information on handling, safety and ecology, please refer to the current safety datasheet.

Forms of delivery
25 kg    Paper bag ……………………………….    40 bags per pallet

Note on disposal
Only recycle completely empty containers. Material residues can be disposed of according to AVV-ASN: 170101 (concrete).

CE marking

BORNIT-Werk Aschenborn GmbH
Reichenbacher Straße 117
D-08056 Zwickau
N 1504-3:2005 ZA.1a
Concrete replacement product for statically and non-statically relevant repairs, mortar application by hand
Compressive strength Class R1
Chloride ion content ≤ 0,05 %
Adhesive capacity ≥ 0,8 MPa
Impaired shrinking/swelling NPD
Carbonisation resistance NPD
Modulus of elasticity > 10 GPa
Temperature change tolerance NPD
Grip NPD
Thermal expansion coefficient NPD
Capillary water absorption NPD
Fire behaviour Class E
 Hazardous substances NPD

Prüfzeichen BORNIT-Dichtungsschlämme

This datasheet replaces any 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 changes in the information contained in this datasheet anytime.


  Technical Data Sheet
  Safety Data Sheet
  DECLARATION OF PERFORMANCE  - in Annex III to Regulation (EU) No 305/2011

  BORNIT® Building Protection Compass  EN | Other: DE [13.986 KByte]

  product image - BORNIT® Slurry SF - 25 kg  [4.376 KByte]
  product image - BORNIT® Slurry SF - 25 kg  [2.581 KByte]

Planning and execution of waterproofing with mineral waterproofing slurry 

(1st edition, July 2020)
Directlink: here  [8.200 KByte]


Note technical rules!
Stock Note


Necessary information – particularly for the use and the use of our products – please refer our brochures. We are at your personal disposal.