Product Description

Primer SL is a one-component, solvent free polyurethane base, ready-to-use adhesion promoter primer which cures quickly through the presence of humidity in the air.

Field of Application

Primer SL is used as the bonding promoter of polyurethane sealants and adhesives on non-absorbent surfaces, such as metals, ceramic, glass and painted sheets or absorbent surfaces, such as concrete, etc.

Primer SL is used for joints that are in frequent contact with liquids for lengthy periods of time or exposed to high mechanical stress after they have been sealed.

Product Details

Product identity

Consistency: liquid
Color: White
Density (kg/m³): 1100
Viscosity (mPa.s): 350
Dry solids content (%): 100


Primer SL is supplied in:
– 1 kg plastic can
– 5 kg plastic can
– 10 kg plastic can


The consumption of PRIMER SL depends on the porosity and absorption of the surface. Typical consumption is between 100 and 200 gr/m².

Application Procedure

Preparation of substrate

The substrate should be dry, clean, and free from grease, oils, residual paint, and other loose material. In each case, the manufacturer’s recommendations for gypsum-plaster must be followed, particularly as far as moisture content and level of surface finishing are concerned. Cracks in concrete surfaces must be repaired with Epoinject. Anhydrite surfaces must be sandpapered.

Preparing the product

Ready to be used.

Applying the product

Stir the PRIMER SL before use; spread it uniformly on the surface with a flat brush or roller without diluting it. If the gypsum plaster surface is particularly smooth and glossy, it is recommended to rub it beforehand. Once it has dried, install the tiles.