LASTOFLEX‑ST is a liquid roof waterproofing coating based on siloxane resins, supplied as a kit for application on roof membranes. It is intended for severe climate zones and can be used on slopes S1‑S4, offering a minimum service life of 25 years. Key properties include a temperature resistance from –40 °C to 90 °C, a dynamic viscosity around 2 500 mPa·s and a density near 1.3 g/cm³, with fire reaction class E (EN 13501‑1).
