By presenting Novasil S 651, OTTO extends its range of two-component silicone pottants such as Novasil SP 5170 and Novasil S 650. Novasil S 651 is the third in a row of specially designed products for safe and reliable filling and potting of PV junction boxes. Novasil S 651 is a two-component alcoxy-silicone-pottant, which combines low viscosity with high mechanical strength. The flow-properties ensure that all sensitive contacts are embedded properly. Moreover, Novasil S 651 meets the flame-classification V0 and offers an extremely strong performance after damp-heat tests (85 °C/85 % rh).