Silicones and adhesives Sikaflex® 290 PRO - Sigillante monocomponente poliuretanico €30.68 Sikaflex® 290 PRO is a UV-resistant, single-component polyurethane sealant specially formulated for caulking joints on boat decks made of wood. The sealant cures to form a flexible elastomer.Non-corrosive, sandable, weather, water and seawater resistant. Add to cart