Waterproofing Materials


BORNIT® Renovation Plaster, grey

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BORNIT® Renovation Plaster
Breathing, water-resistant, thermally insulating interior and exterior  plaster compliant with DIN 18550 with increased vapor permeability, for restoration of masonry wet-through and damaged by salt, suitable for machine use compliant with WTA-Guideline 2-2-91.

Color: grey

4 017228 004648 6800000357 25 kg 40 bags
approx. 1.2 kg/m² for each mm of layer thickness
Tests / CE declaration of performance
LEISTUNGSERKLÄRUNG - gemäß Anhang III der Verordnung (EU) Nr. 305/2011
BORNIT®-Sanierputz, grau - 25 kg

detailed information

Areas of application
BORNIT® Renovation Plaster is used for remedial treatment of soaked and salt-damaged masonry in rooms with high air humidity (basement, kitchen, etc.); as plaster following waterproofing with the BORNIT® Basement Coating System; as plaster following horizontal waterproofing against rising moisture; as breathable, water-repellent and thermally insulating interior and exterior plaster. Not suitable for waterproofing against pressing water. Since splash water or accumulated snow can act like pressurised water, waterproof plaster is recommended for exterior application in the lower base area (up to approx. 30 cm above ground surface).

Type and properties
BORNIT® Renovation Plaster is a pressure-resistant, salt-resistant, water-repellent plaster with good processing properties. With the use of BORNIT® Renovation Plaster, moist and highly salt-contaminated substrates can dry out without damages. Due to its water repellency and its high pore content, BORNIT® Renovation Plaster is water-repellent, prevents the formation of condensate and has a thermally insulating and desalinating effect.
(On request also available in white.)

Product advantages
· Fast, uncomplicated mixing
· Stable, also with higher layer thicknesses
· Easy to process
· Manual and machine processing
· Economical and cost-cutting, due to low equipment and material costs and effort
· Can be applied in single or multiple layers

For masonry reconstruction, first, the existing plaster must be removed, the joints scraped out about 2 cm deep, and a salt treatment performed with BORNIT® Anti Sulphate. Subsequently, the masonry must be provided with a max. 50 % covering rough cast of BORNIT® Renovation Plaster or of BORNIT® Renovation Plaster plus added BORNIT® Stick Emulsion (30 % to the mixing water) in a retiform manner. Highly absorbent substrates must be pre-moistened.

Mode of action
Due to its water repellency, the renovation plaster does not absorb water. But due to the high air void content, a targeted air/vapour circulation via the plaster layer can be achieved, which results in drying out of the wall material due to water evaporation.

sanierputz wirkungsweise

Processing recommendations:
BORNIT® Renovation Plaster is mixed with water into a processable mortar, wherein, if possible, a compulsory mixer should be used. Per bag (25 kg), approx. 3.8 l of water are required. A mixing duration of about 5 minutes must be complied with.
The plaster is usually applied in two layers with an overall plaster thickness of approx. 2.5 cm; the thickness, however, should be at least 2 cm. After sparging, the renovation plaster is spread with a slat and smoothed. If several plaster layers are applied, the lower layers must be thoroughly roughened immediately after application. As waiting period until application of the next layer, 1 day per mm of plaster thickness has proven to be suitable.

In dry weather, with wind and sunshine, follow-up treatment with moistening and possibly also shading may be required. The surface can be designed with an especially structured layer of renovation plaster, with a water-repellent, mineral finishing coat or with mineral paint coats. Water vapour-impermeable layers should not be applied, as e.g. synthetic plasters and vapour-retardant dispersion paints, since the effect of the plaster would thus be restricted.

Old-building renovation, internal and external:
BORNIT® Renovation Plaster would be a very appropriate solution, where a particularly breathable insulating plaster is required, e.g. in wet rooms, basements, kitchens, bathrooms, laundries, bakeries, etc., but also in rooms, which are only occasionally heated or heated only a little, as e.g. churches, holiday homes, toilets, bedrooms, etc. The renovation plaster must be applied in single or multiple layers onto a non-covering rough cast. Correctly applied, BORNIT® Renovation Plaster is also a fully functional exterior plaster according to DIN 18550, part 1.

Application against rising masonry moisture:
Knock off the existing plaster, scrape out crumbly joint mortar and brush it off. Thereafter, treat with BORNIT® Anti Sulphate. Onto the subsequent rough cast of BORNIT® Renovation Plaster with added BORNIT® Stick Emulsion (approx. 10 % to the mixing water), apply the renovation plaster in two layers with a thickness of at least 2.5 cm.

Application against slight capillary moisture:
In case of only slight capillary moisture, the renovation plaster is sufficient. The pre-treatments must be undertaken as with the application against rising moisture.
Application against laterally pressing masonry moisture:
Waterproofing against pressing, flowing water, also if only occurring occasionally, must be undertaken with the BORNIT® Basement Sealing System. A subsequent rough cast results in increased thermal insulation and acts against the formation of condensate.

Approx. 1.2 kg/m² of dry mortar per mm of plaster thickness

Product data in brief
Type Breathable interior and exterior plaster
Solvents None
Colour Grey
Mortar bulk density 1.3 g/cm³
Consistency After mixing, suitable for trowel application
Application Smoothing trowel, card, straightedge
Minimum layer thickness 2 cm
Surface drying time 1 day per mm of layer thickness
Air void content (fresh mortar) ˃30 % by volume
Flexural strength (28 days) ˃2.5 N/mm²
Compressive strength (28 days) ˃5.5 N/mm²
Porosity ˃40 % by volume
Start of solidification at +20 °C After approx. 3 hours
Fire class Non-flammable (DIN 4102)
Storage Dry and in sealed containers
Shelf life 12 months
Cleaning In the fresh state with water
Substances hazardous to health in terms of the ordinance on hazardous materials see “Health and fire protection,
occupational safety”
Hazard class according to VbF and ADR None
GISBAU product code ZP 1


System product
BORNIT® Anti Sulphate
BORNIT® Stick Emulsion

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).


BORNIT-Werk Aschenborn GmbH
Reichenbacher Straße 117
D-08056 Zwickau
EN 998-1:2010 ZA.1
Renovation plastering mortar (R)
Compressive strength after 28 days CS II
Capillary water absorption > 0.3 kg/m² after 24 h
Adhesive tensile strength 0.08 N/mm², fracture pattern A
Dry bulk density 1.27 kg/dm³
Water penetration depth < 5 mm
Coefficient of water vapour permeability μ 10
Fire behaviour A1


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.


Stock Note


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