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Astroflame Intumescent Acoustic Mastic

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Product Description

A one part intumescent acrylic mastic for sealing gaps around fire doors, window frames and for sealing joints, voids and irregular holes in fire rated structures. The sealant forms a char, preventing the passage of fire and smoke, when exposed to the heat of a fire. Maintains fire integrity when sealing around pipes and cables that penetrate walls. Tested in Block Wall, Concrete, Masonry and Plasterboard Partition. Suitable for flexible walls, ridid walls & floors. Tested in Linear Joints up to 50mm wide. Tested in large service openings up to 490 x 150mm. Tested for sealing of linear joints in concrete floors, masonry walls and plasterboard including head of wall details. Tested around metallic pipes, cable trays, cable bunches, small, medium and large cables.

Sealant remains highly flexible after installation In normal use the mastic will maintain the sound reduction index of a structure.The mastic has been independently tested in accordance with BS476 and EN requirements. It can provide up to 300 mins of fire resistance depending on depth/width and volumetric area – please refer to the Performance Table below. It has good unprimed adhesion to a wide variety of common building substrates. although we do recommend that a small area is tested on unusual substrates. Available in 310ml cartridges or 600ml foil packs, in white, brown or grey colours.


Product Performance

Fire resistance: EN 1366-3 EI 120, EN 1366- 4 EI 240 and BS 476 300 mins.

Fire Classification to EN 13501-2. Acoustic Isolation to EN 10140 to 63dB. Air Permeability testing to EN 1026 to 600Pa – 100Pa 0.0/0.0 m3/h/m2. Mechanical Adhesion and Tensile testing to EN ISO 8039 & EN ISO 9046.

Certifier Approval

CE marked

UL-EU, UL-C, UL-US listed

Fire Risistant & testing to ASTM-E 19965 UL2079

Vocleed 2009 EQC41.15 CAQMD

Rule 1168 ASTM D 2369D

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