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Mapei Topcem - Special Hydraulic Binder - Replaces Cement in Sand/Cement Screed
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Mapei Topcem - Special Hydraulic Binder - Replaces Cement in Sand/Cement Screed

code: TOPCEM01
£25.50 inc. VAT (FREE UK Delivery*)
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TOPCEM

Special fast drying hydraulic binder for producing bonded, unbonded or floating screeds, including those with piped underfloor heating. For interior and exterior use. Ceramic / porcelain tiles can be installed after 24 hours with natural stone installation possible after 2 days. Requires the addition of aggregates and water.

Use in combination with PLANICRETE for bonded screeds.
COVERAGE: approx. 2-2.5 kg/m2 per cm of thickness.

TOPCEM

Special fast drying hydraulic binder for producing bonded, unbonded or floating screeds, including those with piped underfloor heating. For interior and exterior use. Ceramic / porcelain tiles can be installed after 24 hours with natural stone installation possible after 2 days. Requires the addition of aggregates and water.

Use in combination with PLANICRETE for bonded screeds.
COVERAGE: approx. 2-2.5 kg/m2 per cm of thickness.
 
WHERE TO USE Formation of bonded, unbonded and floating or heated screeds on both existing and new concrete prior to the installation of wood, PVC, linoleum, ceramic tiles, natural stone, carpet or any other flooring where rapid drying is required for short installation times.

Suitable for indoor and outdoor use.
Some application examples • Formation of screeds set to light foot traffic after 12 hours. • Formation of screeds on which ceramic tiles can be laid after 24 hours. • Formation of screeds on which natural stone can be laid after 2 days. • Formation of screeds on which resilient flooring and wooden flooring can be laid after 4 days. • Patching and repairing floor screeds where rapid restoration is required. • Preparation of screeds incorporating underfloor heating systems without the need for polymer additives.

TECHNICAL CHARACTERISTICS Topcem is a special hydraulic binder which, when mixed with graded aggregates and water, can produce an early drying high strength screed ready to receive floor finishes between 24hrs and 4 days. Topcem is defined within BS 8204 -1 section 5.1.3 part f.

USES • High traffic areas such as airports, shopping centres, schools, hospitals etc. • Fast track construction where the screed needs to be trafficked or overlaid early. • Suitable for thin resin or cementitious systems such as Mapefloor or Ultratop. • Suitable for underfloor heating systems. • Suitable for use where BRE screed test category A or B is required.

RECOMMENDATIONS • Do not mix Topcem with other cement, lime, gypsum or Mapecem etc. • Do not leave Topcem dry-mixed with aggregates, immediately add the correct quantity of water to the mix. • Do not mix Topcem just with fine sand, use aggregates graded to BS EN 13139 0/8. • Do not mix Topcem with an excessive quantity of water. • Do not add water and remix Topcem after it has started to set.

APPLICATION PROCEDURE Preparating the substrate All substrates are suitable for receiving a Topcem screed. For unbonded screeds Isolate the substrate with a sheet of polyethylene or similar; in the case of rising damp provide a suitable waterproof membrane. For bonded screeds the substrate must be dry, resistant to compression and tension, free from cracks, dust, loose material, oil, paint, wax and traces of gypsum. For other types of substrates consult MAPEI’s Technical Services Department.

UNBONDED SCREEDS (min 35 mm thick) Preparing the mix Carefully mix the Topcem with graded aggregates 0/8 mm in diameter and water, in a mixer or screed pump for at least 5 minutes. The mix must be spread, tamped and levelled in the shortest possible time and in any event not more than an hour after preparation. Particular care must be taken with the quantity of water which must be such as to obtain a mix with a “damp earth” consistency that under a float finish
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