Home > Companies > Mapei (UK) Ltd > Mapeflex Firestop 1200°C

Single component, asbestos-free, quick setting, rigid, silicate refractory sealing grout resistant to flames, high temperatures and fumes. Ideal for making rigid seals in chimneys, ovens, radiators, barbecues, flues and fire-break walls. Also suitable for pointing or for installation layers on refractory bricks when building or carrying out maintenance work on elements in continuous, permanent contact with flames or heat up to 1200°C, with temporary peak temperatures up to 1600°C.

A soft paste in emulsion which forms rigid grout when the water contained within has evaporated off. The non-deformable grout contains sodium silicate and special mineral fillers which are completely free from hazardous toxic substances.

Not suitable for use on:

  • Dusty or weak (crumbling) surfaces.
  • Surfaces with stagnant water or with capillary rising damp. Damp substrates may be tolerated.
  • Joints subject to cyclical movements.
  • Surfaces exposed to frequent contact with rainwater or high levels of humidity.

Related literature

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Standard product features


Silicates, resins, sodium silicate (alkaline) with inert minerals.



NBS Specification

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This product is associated with the following NBS Create clause:
45-55-50/410 Epoxy resin grout

NBS Specification

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This product is associated with the following NBS clauses:

Product specification

An important note about specifying



Mapei (UK) Ltd


+44 (0)121 508 6970

Product reference

Mapeflex Firestop 1200°C

Manufacturer details

Mapei House,
Steel Park Road,
West Midlands, B62 8HD
Tel +44 (0)121 508 6970
Fax +44 (0)121 508 6960
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