Permanent, High-Strength Bonds for Structural Marine Repairs

TotalBoat 52 Million is a fast-curing polyurethane adhesive sealant engineered for permanent structural bonding in marine applications. Ideal for critical installations above or below the waterline, this high-strength formula creates lasting bonds on fiberglass, gelcoat, metal, wood, glass, and compatible plastics. Ideal for use in hull-to-deck joints, thru-hull fittings, keel attachments, bulkheads, stringers, and other load-bearing marine components that demand maximum bond strength and durability.

Highly Durable, UV-Resistant Formula

Designed to handle extreme marine conditions, TotalBoat 52 Million maintains exceptional adhesion and flexibility, resisting cracking, shrinking, or degradation from constant exposure to saltwater, UV rays, moisture, vibrations, and temperature fluctuations. Whether used topside or below the waterline, this sealant ensures professional-grade durability and reliable waterproof performance season after season.

Fast, Waterproof Cure in Just 24 Hours

With a quick 24-hour full cure, TotalBoat 52 Million helps you complete structural marine repairs efficiently with strong, watertight seals you can rely on. Tack-free in 10-30 minutes to keep your workflow clean and efficient, the moisture-curing polyurethane formula achieves usable bond strength within one day, reaching maximum strength in 3-5 days. Simple application from the convenient 10 oz. cartridge makes it perfect for DIY boat owners and professional marine technicians alike.

52 Million Marine Adhesive Sealant Details:

• Creates permanent, structural bonds above and below the waterline
• Bonds well to fiberglass, gelcoat, metals, some plastics, glass, and wood
• Flexible formula maintains adhesion through vibrations, shocks, hull movement, and temperature extremes
• Tack-free in just 10–30 minutes for clean and easy application
• Fully waterproof and ready for use within 24 hours
• Won’t sag or run, ideal for precise applications on vertical or overhead surfaces
• Exceptional resistance to saltwater, UV rays, moisture, and harsh marine conditions
• 10 Oz. cartridge fits standard caulking guns for simple application
• Disposable gloves included for safer use
• Use what you need now, then store the remainder conveniently for future projects.

Need flexible seals you can remove later? TotalBoat 42 Million Marine Adhesive Sealant provides the same reliability with semi-permanent bonds.