Sikasil® WS-295 sealant is a one part, neutral cure for use in most common weatherproofing applications on a wide variety of materials. Meets the requirements of ASTM C920, Type S, Grade NS, Class 50, Use NT, M, G, A, As a weatherseal in conventional glazing, including cap, toe and heel beads. As a weatherseal in glass to glass butt joint glazing.