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• Features & Benefits
• Recommendations
• Application Procedure
• Storage and Safety Instructions

Features & Benefits

• For damp-proofing cement based, moisture-resistant, non-heated substrates where residual moisture content values are up to 4.5 CM-%, before the application of levelling compounds
• For insulating residual construction moisture where relative humidity values are up to 95% R.H.
• Suitable for use with heated screeds up to 85% R.H.
• No primer or sprinkling sand is required with subsequent levelling compounds
• Can be resealed and stored with no particular precautions for future use
• Not inflammable
• Blauer Engel - DE-UZ 113

Recommendations

• Apply Mapeproof Primer only on internal flooring
• Do not use over anhydrite or other gypsum/sulphate based substrates
• Use epoxy or polyurethane primer on magnesium screed
• Do not use on substrates subject to rising damp

Application Procedure

Preparation of the substrate:

• Substrates must be uniformly sound, free of dust, loose particles, cracks, paint, wax, oil, rust or other products that can interfere with bonding
• Screeds and concrete bases over base-ground must be provided with a structural damp proof membrane
• The residual moisture content of non-heated cement screeds must not exceed 4.5CM-%
• Cracks have to be filled with a suitable product before applying
• Joints designed to allow movement of the substrate must not be bridged with Mapeproof Primer, but sealed with a suitable impervious flexible jointing compound after the application of the membrane
• The absorbency of the screed must be ensured
• Compact substrates must be prepared mechanically

Application of the Primer:

• Shake the can to mix the contents immediately prior to use
• Mapeproof Primer must be applied in a minimum of two coats
• The floor temperature must be above +10°C when the primer is applied
• Mapeproof Primer should be applied over the whole floor
• With particularly low absorbent or finished screeds with a tight surface, first apply a dilute coat of Mapeproof Primer (1:1 with water) and allow to dry (approx. 20 mins) - this will ensure that the Mapeproof Primer penetrates into the surface of the screed prior to applying the two coats of undiluted Mapeproof Primer
• 1^st Coat: Using a pre-coated roller apply the first coat in one direction ensuring that the material is worked well into the substrate
• 2^nd Coat: When the 1st coat is touch dry, approximately 15-30 minutes at +20°C, apply the 2nd coat at a right angle to the 1^st coat
• It is essential that a pin-hole free coating is achieved and to maintain a consumption of approx. 250 g/m² as a two coat application (coverage: 4m²/kg)
• When applied to very absorbent surfaces, the membrane can be absorbed into the substrate leaving a subdued shine
• In such instances or where pinholes and weak spots are evident, a further application will be required
• After complete drying of the primer, smoothing compounds from the Mapei range can be applied
• The drying times vary depending on the absorbency of the substrate and the room climatic conditions (temperature and humidity) between 2 and 5 hours
• Apply the appropriate Mapei smoothing compound within 12 hours of the curing of Mapeproof Primer to provide an absorbent surface suitable for the application of adhesives
• If Mapeproof Primer is not covered within 12 hours of curing, a further coat must be applied and allowed to dry before proceeding with the application of the skimcoat

Cleaning:

• While still wet, Mapeproof Primer can be cleaned from floors or wall coverings, tools, hands and clothing with water
• When dry, use alcohol or specialist cleaner

Storage and Safety Instructions

• Under normal conditions Mapeproof Primer is stable for at least 12 months in its original sealed packaging
• Protect from frost
• Instructions for the safe use of the product can be found on the latest version of the Safety Data Sheet (see 'Data Sheets' tab above)