This Everbuild Silicone 825 offers plus or minus 35 percent flexibility and is a neutral cure sealant. It conforms to ISO 11600 Class F25LM and G25LM, suitable for both interior and exterior use. It is typically used for expansion joints in materials such as stone, brick, concrete, and composite panels. It is also ideal for perimeter pointing on window and door frames, weatherproof sealing for most external applications, and in construction and dilation joints where stress does not occur until fully cured.