Description

Fire Retardant MS Polymer Sealant Alseal AS-4003 is a single-component moisture-curing sealant based on advanced MS Polymer technology, providing flexibility in fire-resistant joints. It complies with fire safety requirements BS EN 1366-4:2021. It is waterproof, can be painted with standard industrial paints; the sealant layer does not shrink after curing; and the isocyanate-free formula allows it to be used on damp surfaces and prevents air bubbles from forming. Even without a primer, it has excellent adhesion to various substrates. It is an environmentally friendly sealant developed in accordance with low volatile organic compound (VOC) requirements.

Applications

Recommended for sealing all construction and structural joints and provides fire protection for expansion and deformation joints. It is used for sealing internal and external expansion joints where fire resistance of up to 4 hours is required, in precast and monolithic concrete, expansion and working joints, structures with lifting and turning devices, brick and block masonry, fiber cement boards, drywall, etc. It is also used as a sealant and gap filler to prevent the penetration of dust and water, as well as for sealing joints, voids, and uneven holes in fire walls, partitions, and other structures.

Features

√ 4 hours fire rating
√ ASTM C920 compliant
√ ±25 % movement capability
√ Good UV resistance
√ Low static charge – Less dirt streaking
√ No isocyanate – No blistering
√ No solvent – No shrinkage
√ Bonds most substrates without primer
√ Water resistant