HENSOMASTIK® Acrylic for Linear Joints and Gaps

Fire resistant sealing compound for linear joint and gap seals

The new HENSOMASTIK® Acrylic is a ready-for-use acrylic based liquid filler especially designed to form a fire penetration seal in linear joints and gaps where wall and floor constructions made of different materials or different construction elements and substrates adjoin.

The product system HENSOMASTIK® Acrylic for Linear Joints and Gaps was assessed on the basis of EAD 350141-00-1106 and DIN EN 1366-4 as a flexible white acrylic sealant especially formulated to provide excellent fire resistance and acoustic performance.

HENSOMASTIK® Acrylic is supplied in liquid form in cartridges or sleeves and may be used to provide a linear joint or gap fire penetration seal with a variety of supporting constructions and substrates, see ETA 23/0324 for construction details and classification.

The seal is formed by inserting a backfill of darning wool, mineral wool or a friction-fitted mineral fibre board with given minimum density, thickness and depth in the gap to ensure the correct filling depth of HENSOMASTIK® Acrylic, which is applied from only one or both sides, depending on the use case and classification of the seal.

One-sided fire penetration seal variants up to EI 120 minutes are available and allow simple and quick execution also in areas with limited access. For each construction variant, the stated minimum density and filling depth of the mineral wool backing and HENSOMASTIK® Acrylic may be increased in practice, but not reduced.

HENSOMASTIK® Acrylic has certified low emissions, is environmental and user friendly, and compliant to most common regulations or protocols for sustainable building materials, e.g. German AgBB, Finnish emission class M1 or rating A+ according French VOC regulation.