HYDROSWELLING WATERBARS FOR CONSTRUCTION JOINTS METER(S) | NASIR & SONS SIKA BASF MBCC PAKISTAN

Ready for installation in cold joints to render the joints leak-proof. It is based on a blend of acrylate polymers and a unique hydroswelling polymer that acts by swelling on exposure to water, to form a seal. Areas of Application SIKASWELLBAR is recommended for all construction joints exposed to hydrostatic pressure. Application areas include joints between: Abutments of concrete and rock, masonry, etc. Rafts and walls in tunnels and basements. Steel and concrete pipes, precast elements etc. Characteristics & Benefits Swells in contact with water by up to 150% – prevents water ingress even when the joint width varies. Water molecules held by molecular attraction – captured water does not get transported through capillaries thus stopping further water ingress. Controlled swelling – swelling pressure insufficient to damage concrete. Does not form foam or gas with water – water absorption creates a durable seal. No air bubbles to breakdown and allow leaks. Reversible swelling process – MasterSeal 910 will reabsorb water after dry periods and accommodate minor movements in the structure. Typical Performance Data Swelling: The degrees of swelling of MasterSeal 910 when exposed to different solutions are illustrated in the chart below. The swelling action is designed to exert adequate pressure to profile the waterbar exactly onto the joint faces, to provide a tight seal even against high hydrostatic pressures. Note: The swelling action does not change the homogeneous structure of the polymer matrix. The swelling is confined to the part exposed to water, since the waterbar is designed not to transport the captured water through its matrix. Application Surface Preparation Joint surfaces should be structurally sound, clean, and free from loose particles and sharp protrusions, oil, grease, or any other contaminant. Repair any honeycombs, uneven surfaces and such other defects with a suitable Master Builders Solutions repair mortar such as MasterEmaco N 5200CI. Clear any standing water on the surface.