Mineral-based concrete repair materials and highly developed exterior sol silicate paint systems, based on a combination of silica sol and potassium silicate binding agents.

Because of the specialist nature of these products and the highly sensitive areas of their application, advice and dedicated project specifications should be sought from Keim Mineral Paints prior to undertaking concrete repairs.

The system includes:

- Pre-treatment and preparation:

Keim Concretal-Cleaner: Acidic concrete cleaner for the removal of release agents and surface impurities from concrete.
Keim Silan-Primer: A silane-based water repellent for use as a priming coat with Keim silicate paints to provide maximum resistance to water penetration without impairing the breathability of the substrate.
Keim Silan 100: Solvent-free silane primer offering very high levels of water repellence.

- Concrete repair:

Keim Concretal MKH: Mineral cement based corrosion protector and bonding mortar.
Keim Concretal-MR 2.0 (Repair Mortar): Pre-bagged non shrink cementitious repair mortar for large scale concrete repairs.
Keim Concretal-FSP 0.2 (Fine Finishing Mortar): Pre-bagged cementitious fine finishing mortar for crack repair, filling of blow holes and surface equalisation.

- Paint (finishing coat):

Keim Concretal C: Formulated for protection from carbonation, water and chlorides.
Keim Concretal Lasur: Formulated for colour equalisation and weather proofing.
Keim Concretal W: Formulated for protection from water, chlorides and weather.

Surface preparation:

All loose and spalling concrete and material should be hacked off back to a sound base; all steel elements should be brushed with a wire brush to achieve a bright finish. The steel elements should then be treated with two coats of Keim Concretal-MKH, brush applied with a minimum period of three hours between coats.
Manufacturer recommends the use of Keim Spachtel, a silicate based paste filler for all mineral substrates prior to application. Any new/ repaired surfaces should be left for a minimum period of 15 days prior to any decoration taking place.

Consult manufacturer for the specific/ recommended surface preparation information required between each coat.

Keim Concretal W Fire Certificate B21110 May 2021