It cures to form a firm, rubbery, waterproof seal on joints and boat hardware, above and below the waterline. 3M™ Marine Adhesive Sealant 5200 is a one-part polyurethane that chemically reacts with moisture to deliver strong, flexible bonds. It forms watertight, weather-resistant seals above and below the waterline. Bottom line: This tied the Sika 291 as the Best Choice for an adhesive sealant. This product has been trusted throughout the marine industry for over 50 years. Precautionary Statements Use 3M™ Marine Adhesive Sealant 5200 to seal joints and boat hardware. Stays flexible too - allows for structural movement. In It cures to form a firm, rubbery, waterproof seal on joints and boat hardware, above and below the waterline. Very similar to 3Ms 4200 and Sikas 291, the polyether Loctite Marine Sealant is a thick, medium- to fast-cure product intended for use above and below the waterline. It forms a watertight, weather-resistant seal on joints and boat hardware, above and below the waterline. 3M™ Marine Adhesive Sealant 5200 is a one-component, high-strength, moisture-curing, gap-filling polyurethane for permanent bonding of wood, gelcoat and fiberglass. It demonstrated a wide range of compatibilities and very high strength in tests. The seal is extremely strong, retaining its strength above or below the waterline. Stress caused by shock, vibration, swelling or shrinking is effectively absorbed. May cause an allergic skin reaction. When fully cured, this high strength marine adhesive remains flexible and suitable for use where shock, vibration, shrinking or swelling are concerns. 3M™ Marine Adhesive Sealant 5200 is a one-component, high-strength, moisture-curing, gap-filling polyurethane for permanent bonding of wood, gelcoat and fiberglass. The 3M™ Marine Adhesive Sealant 5200 is a single-component, high-strength, moisture-curing, gap-filling polyurethane for permanent bonding of wood, gelcoat and fibreglass. It cures to form a firm, rubbery, waterproof seal on joints and boat hardware, above and below the waterline. 3M™ Marine Adhesive Sealant Fast Cure 4200 3M™ Marine Adhesive Sealant Fast Cure 4000 UV 3M™ Marine Adhesive Sealant 5200 This high-performance polyurethane adhesive sealant becomes tack-free in 24-48 hours, and completely cures in 5-7 days with no shrinking. In addition, its flexibility allows for dissipation of stress caused by shock, vibration, swelling or shrinking. 3M™ Marine Adhesive Sealant 5200 is extremely strong and retains its strength above or below water line. 3M Marine Adhesive Sealant 5200 3M Marine Adhesive Sealant 5200 is a one-component, high-strength, moisture-curing, gap-filling polyurethane for permanent bonding of wood, gelcoat and fiberglass. It cures to form a firm, rubbery, waterproof seal on joints and boat hardware, above and below the waterline. 3M Marine Adhesive Sealant 5200 3M Marine Adhesive Sealant 5200 is a one-component, high-strength, moisture-curing, gap-filling polyurethane for permanent bonding of wood, gelcoat and fiberglass. 3M™ Marine Adhesive Sealant Fast Cure 4200FC is a one-component, medium-strength, moisture-curing, gap-filling polyurethane that delivers strong, flexible bonds to aluminum, wood, gelcoat and fiberglass. 3M(TM) Marine Adhesive Sealant 5200, White, PN 05203, PN 05206, PN 06500 07/25/18 _____ Page 2 of 11 Hazard Statements May cause allergy or asthma symptoms or breathing difficulties if inhaled. It cures to form a firm, rubbery, waterproof seal on joints and boat hardware, both above and below the waterline. It has excellent adhesion to wood, gelcoat, and fiberglass. Stays flexible too - allows for structural movement. Loctite Marine Sealant. 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