Climaflex pipe insulation is a polyethylene based closed-cell foam pipe insulation for heating and plumbing. Commonly used to insulate central heating pipework and as a pipe insulation in loft spaces to prevent freezing. In most domestic applications Climaflex pipe insulation is an excellent combination of good performance and low cost. Properties Length: 2m. Pipe size: 42mm. Wall thickness: 13mm. Lengths per pack: 45x lengths. Pack coverage: 90m. Thermal conductivity: 0.038 W/mK at 40C. 0.036 W/mK at 20C. 0.034 W/mK at 0C. Temperature range: -45C to 105C. Noise dampening: up to 23dB.