Bostik STR350A Silyl Modified Polymer Adhesive Sealant is a high-performance, one-part hybrid sealant designed for strong, flexible bonding and sealing across a wide range of substrates. Based on silyl modified polymer technology, it offers excellent adhesion without primers, along with resistance to weathering, moisture, and UV exposure. Supplied in a 20 oz sausage pack for use with bulk applicators, this white sealant is ideal for construction, industrial, and general assembly applications requiring durability and long-term flexibility.