Everbuild Everflex® 335 Construction Silicone is a low modulus, reactive curing silicone sealant that cures quickly to reduce dirt pick up. Remains permanently flexible, forming a weather tight rubber-like seal. Tested to ISO 8339 and ISO 10590 / 10563 and has a faster curing time than conventional low mod sealants with an extremely low dirt pick up. It is also flexible and waterproof giving a good sound seal for a professional finish. Contains a powerful anti fungal compound to prevent mould growth and will cover a great range of applications.