Sika 850, commonly known as Sikaflex®-850 HMP, is a high-performance, fast-curing, one-component polyurethane adhesive and sealant. Engineered specifically for the demanding requirements of the marine industry, it excels in structural bonding applications where high initial tack and rapid strength development are crucial. This high-modulus product provides excellent adhesion to a wide range of substrates including timber, metals, metal primers, paint coatings, and glass-reinforced plastics (GRP). Its robust formulation ensures outstanding resistance to weathering and seawater, making it the ideal choice for bonding large components such as hulls to decks, bulkheads, and other structural elements in boat and ship manufacturing.