October 23, 2017

Fixing gaps the convenient Mapei way

Continuing to identify the needs of the local construction industry and DIY market for technically advanced but user-friendly chemical building solutions, Mapei South Africa now offers MapePUR Universal Foam M. This one-component expanding polyurethane foam is the practical, convenient solution to use for general gap filling, soundproofing and thermal insulation.

MapePUR Universal Foam M comes in a handy 750 ml spray can with a trigger operated nozzle that delivers up to 45 litres of polyurethane foam in free expansion. The foam hardens quickly and, subject to the prevailing temperature conditions, can be sanded after 30 minutes, or cut, ground, drilled, or skimmed with cementitious products, or painted. The foam expands when it comes into contact with humidity and to increase the expanded foam volume, the substrates around the gap are dampened by spraying with water prior to applying MapePUR M. Similarly, to increase polymerisation in the foam and achieve a higher expansion level after injection into a gap, the foam can be sprayed with water.

Buildings are made from numerous different materials and structures and it is inevitable that gaps exist or are formed when they are put together. MapePUR M adheres well to all materials normally used in the building industry such as brickwork, concrete, gypsum, wood, metal, glass, foam polystyrene and PVC. The hardened foam has excellent mechanical properties, high insulating and soundproofing properties, as well as having good resistance to the formation of mould and mildew.

Some typical applications for MapePUR are insulating and soundproofing door frames, window frames and roller blind housings; fixing support frames in place for door and window fittings; insulating through pipes for heating, air-conditioning and cooling systems; fitting and insulating construction features and fittings on roofs; and sealing formwork to make it leak-proof when pouring in concrete.

MapePUR Universal Foam M is another technology innovation from the international Mapei group, world leader in the production of adhesives, sealants and chemical products for building. In line with the group’s focus on sustainable development and the production of environmentally-friendly products, MapePUR M foam is made from a mixture of polyurethane prepolymer, foaming agents and special additives, and does not contain any ozone layer damaging CFCs.

“MapePUR M is such a convenient to use, versatile product that it is destined to be a standard item in every builder’s toolkit,” comments Mapei South Africa’s Product Manager, Paul Nieuwoudt.

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