Construction and concrete technology company Mapei has increased its product range used in various applications in the building and construction industry. The Mapeflex Firestop 1 200 °C is a refractory grout that is highly resistant to flames, high temperatures and fumes.
Mapeflex is asbestos-and solvent-free and is made from sodium silicate and special mineral fillers. Bonding to all porous and absorbent substrates, the odourless and quick-setting product is suitable for the rigid grouting of joints in chimneys, ovens, radiators, barbeques, flues and rigid firebreak joints, as the soft, grey paste can withstand temperatures of up to 1 200 °C, as well as temporary peak temperatures of up to 1 600 °C.

“The product is also suitable for pointing or for installation layers on refractory bricks when building or carrying out maintenance work on elements that are in continuous contact with flames or heat,” says Mapei South Africa building systems product manager Paul Nieuwoudt.

For best results, Mapei recommends that the surfaces that are bonded or sealed with Mapeflex be dry or slightly damp, solid and free of dust, loose parts, oil, grease, wax, old paintwork and rust on metal surfaces.

“The product should not be applied to surfaces that are frequently exposed to rain, high levels of humidity, stagnant water or that are subjected to capillary rising damp.

“It is also not suitable for joints that are subjected to cyclical movements,” says Nieuwoudt.

Mapeflex is available in boxes containing 12 cartridges of 300 mℓ each.

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