Celotex US4025 is a premium performance PIR solution for floor perimeter upstands suitable for use with Celotex FI5000 . Celotex US4025 is manufactured from rigid polyisocyanurate (PIR) using a blowing agent that has zero ozone depletion potential (ODP) and a low global warming potential (GWP). Designed to limit the thermal bridging at floor junctions and is easy to cut and install. Celotex US4025 is the perimeter upstand solution for the following applications when using Celotex FI5000 in concrete slabs, beam and block flooring and underfloor heating. To find out more about this item or any other products in our range please speak to a member of our experienced sales team today.