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Fire Rated Mortar - M4

A water-based, lightweight, high insulation expanding mortar which provides a fire barrier for up to four hours for openings with building service penetrations. It contains no toxic or smoke producing materials and is water resistant after curing.


Fully certified to Australian Standards AS1530.4 and AS4072.1 for up to 4 hours of fire rating at 100mm thick, or 2 hours rating when 75mm thick.

20kg bags

Suitable for floors and walls

Especially suitable for use with Pyropanel Pyroraps

Water resistant after drying

Maximum size in floor or wall = 0.6m2 with max dimension 1200mm in any direction (up to 90 mins FRL), or 500mm x any length @ 75mm thickness -/120/120.

Maximum size in floor or wall = 0.4m2 with max dimension 800mm in any direction (up to 4hrs FRL)Australian made

12 months shelf life