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Description Sika Boom® S is a 1-component, fast curing polyurethane foam made for easy application. Sika Boom® S is designed for fixing, insulating and filling connection joints around windows and door frames, pipe entries, air-conditioning vents and electrical equipment. Sika Boom® S allows insulation against noise, cold and draughts after a single application. Key Features 1-Component Easy application with nozzle High expanding rate Fast curing Very good thermal insulation Effective sound dampening HFC-free