Waterproofing Materials


BORNIT® Sealing Mortar

  • Quick facts
  • Detailed information
  • Downloads
  • Hints

quick facts

BORNIT® Sealing Mortar
Ready-mix mortar with adhesion enhancing substances. After curing, the mortar is water-repellent and frost-resistant. For making wall/floor joint coves in basement construction, for making waterproof plasters, as water-repellent masonry and joint mortar, as repair mortar for  concrete and masonry walls. Modified with BORNIT® Stick Emulsion it becomes a very good repair mortar.

Colour: grey

4 017228 004600 6800000358 25 kg 40 bags
approx. 25 kg 1 - 1.5 kg/m² for each mm of layer thickness
Cove radius 5 cm: approx. 2 kg/m²
tests / CE declaration of performance
BORNIT®-Sperrmörtel - 25 kg

detailed information

Areas of application
BORNIT® Sealing Mortar is used for executing the connecting fillets between walls and floors in basement construction, for producing sealing plasters, as a waterproof masonry and joint mortar as well as a repair mortar for concrete and masonry.
Adding stick emulsion results in a very good repair mortar for concrete and screed surfaces.

Type and properties
BORNIT® Sealing Mortar is a waterproof ready-mix mortar with very good adhesion to the substrate. Simply mixing it with water produces a smooth, well-processable thick mortar, which provides high tensile adhesive and strength values after 24 hours already. After thorough hardening, the mortar is waterproof and frost-resistant. BORNIT® Sealing Mortar complies with EN 998-1.

Product advantages
•    Good adhesion to substrates common in construction, also to old structures
•    Solvent free
•    Economical and cost-cutting, due to low equipment and material costs and effort
•    Waterproof and frost-resistant after thorough hardening

The substrate must be firm, clean and mineral-based.

Processing recommendations:
Mix 25 kg of sealing mortar into 2.5-2.9 l of water + 1 kg of BORNIT® Stick Emulsion.
Upon processing without the stick emulsion, add 1 litre of water more.

Prior to executing the hollow fillet in the basement area, prime with BORNIT® Slurry SF. Upon surface plastering, we recommend applying a coarse plaster layer beforehand. Apply with respective layer thicknesses using a jointer trowel (for fillets) or a trowel (for surface plastering), resp. The mortar remains processable for about 3 hours.

Approx. 1.8 kg/m² per mm of layer thickness
Approx. 2.5 kg/linear metre of hollow fillet at a radius of 5 cm

Product data in brief

Type waterproof ready-mix mortar
Solvent none
Colour grey
Consistency after mixing, apply using a trowel
Application Smoothing trowel
Processing time 3 hours
Revisable after 24 hours
Compressive strength (24 h) ˃ 10 N/mm²
flexural strength ˃ 2,5 N/mm²
Storage dry
Shelf-life In originally sealed containers storable for 6 months.
Cleaning In the fresh state with water, in the hardened state mechanically
Substances hazardous to health in terms of the ordinance on hazardous materials    Contains cement, therefore alkaline reactions; for more information see
Hazard class according to VbF and ADR none
GISBAU product code ZP 1


System products
BORNIT® Stick Emulsion

Can be stored for 6 months in original sealed containers.

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 sack    ………………………………………..    40 pcs. per pallet

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


BORNIT-Werk Aschenborn GmbH
Reichenbacher Straße 117
D-08056 Zwickau
EN 998-1:2010 ZA.1
Normal plaster mortar (R)
Compressive strength after 28 days CS IV
Capillary water absorption WO
Tensile adhesive strength ≥ 1.5 N/mm²
Fracture pattern A/B
Dry bulk density 1,5 - 1,8 Kg/dm³
Water penetration depth NPD
Coefficient of water vapour permeability µ ≤ 20
Fire behaviour A1


  Technical Data Sheet
  Safety Data Sheet

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

  Product image - BORNIT® Sealing Mortar - 25 kg  [4.194 KByte]
  Product image - BORNIT® Sealing Mortar - 25 kg  [2.479 KByte]
  Product image - BORNIT® Sealing Mortar - 25 kg  [39.657 KByte]

  QR-Code  [47 KByte]

Richtlinie - Abdichtungen mit kunstoffmodifizierten Bitumendickbeschichtungen (KMB)

Richtlinie für die Planung und Ausführung von Abdichtungen mit kunststoffmodifizierten Bitumendickbeschichtungen (KMB) - erdberührte Bauteile - (3. Ausgabe, Mai 2010)
Direktlink: hier  [2.586 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.