Kingspan Kooltherm Cavity Closer Kingspan Kooltherm Cavity Closer is a uPVC extrusion with a premium performance fibre-free rigid thermoset phenolic core, for use in England and Wales only. It provides a simple and efficient method of closing cavities around openings in masonry cavity walls, and has a thermal conductivity of 0.022 W/mK. Buy yours with us today at www.insulationbee.co.uk or speak to one of our friendly staff on 02038839057
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