Undercoating Renovation Plaster 920 is a factory-prepared mixture of hydraulic binders, route, mineral fillers with special graining and modifying additives. It is characterized by easy workability and high adhesion. After hardening, water and frost resistant. Hydrophobic. Does not limit vapor permeability. Is a layer that stores salts in walls with medium and high salinity. The product complies with WTA guidelines.

Destiny

Undercoat Renovation 920 is a primer for 921 and 922 plasters in the KREISEL renovation plasters system, in places with medium and high load of salt. Thanks to high porosity, it takes over and stores salts migrating from the ground, without reducing their strength parameters. The product is especially recommended for renovation and conservation of the historic building. It is suitable for application with a plastering unit (with a double mixing system, e.g. M-TEC DUO-MIX) and manually.

Technical data

• fresh mortar volume density: approx. 1.60 g / cm3,
• bulk density of hardened mortar: approx. 1.40 g / cm3,
• compressive strength after 28 days: category CSIV,
• flexural strength after 28 days: 1 MPa,
• shrinkage after 28 days of hardening: <0.1%,
• water penetration after water absorption test caused by water capillary action:> 5mm,
• water absorption due to capillary uplift: ≤ 0.3kg / m2min0.5,
• water vapor permeability coefficient m: ≤ 18,
• thermal conductivity coefficient λ (tabular value): <0.47 W / m * K
• dissolved chromium VI content: ≤ 0.0002%
• storage: up to 9 months from the date of production, in dry places and in undamaged factory packaging,
• the product has the required documents for use.