Bostik PRO-MS 50™ is a one component, low modulus, solvent free Silyl Modified Polyether Sealant. It demonstrates hybrid sealant properties such as color stability and long lasting elastomeric qualities for building envelop architectural grade applications. 

Primary applications include vinyl window perimeter sealing, fiber cement board, engineered trim board, flexible flashing materials, metals such as Kynar coated metals, Bondarized, and galvalulme, and siding applications.