Polyurethane pre-levelling sealer coating.
Sikafloor® 31 PurCem is a three component, solvent free, coloured, matt finish, polyurethane coating with excellent chemical resistance and very good resistance to abrasion and mechanical damage. Also suitable for use as a seal coat to Sikafloor® 20 and 29 PurCem.
Suitable areas of application:
The cementitious substrate should be sound and of sufficient compressive strength (minimum 25 N/ mm²) and pull off strength (minimum 1.5 N/mm²). The surfaces must be dry and free of all contaminants, e.g. oils, grease, surface treatments and coatings, etc. The substrate must be prepared mechanically to achieve an open textured fine gripping surface, free of cement laitance. Weak concrete should be removed and surface defects such as blowholes and voids must be fully exposed. All dust, loose and friable material must be completely removed, preferably by brush and vacuum, from all surfaces before application of the coating. Prior to application, confirm substrate moisture content.
Sikafloor® 31 PurCem
Number of coats
200–250 micrometres/ coat
Surface finish/ treatment
Standard product features
A short nap roller is used, ensuring that the coating fully wets the concrete surface. If applying on Sikafloor® 161 ensure the correct overcoating time and substrate moisture contents are observed.
Only required on excessively porous substrates. Consult manufacturer for type.
Number of coats:
Sikafloor® 31 PurCem is typically applied in two coats.
Refer to colour chart. Consult manufacturer for details.