Kooltherm K106 is an advanced full fill cavity wall insulation solution, with a 10 mm residual cavity. It has a thermal conductivity of 0.019 W/mK and can achieve the same wall U-value as alternative products with a much thinner profile. Its low thermal conductivity can help save money on overall construction costs. Kooltherm K106 has a water-tight, vapour-open polypropylene fleece outer facing that protects against moisture penetration.