Modified silicone sealant and adhesive is a hybrid silicone product used in many construction, manufacturing, and assemble applications. It's eco-friendly, non-toxic formula adheres to many types of materials including vinyl. NexoFlex MS-1000 is a top-rated modified silicone, or hybrid sealant used by window and door manufacturers and installers. Manufacturers use the MS product as a fast-tack, moisture cure adhesive that bonds with many materials to provide a durable, flexible bond and sea