Thermal isolation Low-E glass Low-E glass comes in two types: soft-coated and hard-coated glass.The main difference is the thermal transmittance coefficient, which in the case of soft-coated glass is 1.0 or 1.1 W/m2K, with 1.6 W/m2K for hard-coated glass. Low-E glass Reflective glass Reflective glass is made by sputtering metal oxides onto the glass surface, with clear float glass or body-tinted glass used as the base glass.Our offer includes a range of reflective glass from AGC. Reflective glass - Stopsol