Calvana 5200 Marine Sealant — 2-Pack Black 310ml, Fast-Cure UV-Resistant Underwater Bond

Calvana 5200 Marine Sealant (2-pack, 310ml each) is a heavy-duty, UV-resistant adhesive that cures fast, bonds permanently to fiberglass, metal, wood and even underwater, for hulls, deck fittings and RV repairs.

Designed for demanding marine and outdoor applications, this two-tube set of black Calvana 5200 delivers a professional-grade, flexible seal that resists UV, salt and weathering. Each cartridge includes a pre-attached nozzle and nitrile gloves so you can apply a precise bead right away. The formulation reaches a tack-free surface in about two hours and builds to full waterproof strength within 24 hours, helping you complete repairs and installations faster.

How quickly does Calvana 5200 cure and become watertight?

The sealant skins over quickly—typically tack-free in around two hours—so you can avoid long wait times between steps. It continues to cure through 24 hours to develop full waterproof strength, making it suitable for time-sensitive repairs.

• Tack-free in ~2 hours for quick handling
• Functional waterproofing within 24 hours
• Fast cure reduces project downtime
• Works in above- and below-waterline applications

Will this sealant stick to my boat, deck, or RV surfaces?

Yes—Calvana 5200 forms a permanent, flexible bond on common marine materials such as fiberglass, gelcoat, wood and metal. It’s engineered to hold hardware, bed fittings and repair seams without losing adhesion under stress.

• Excellent adhesion to fiberglass and gelcoat
• Strong bonding on metal and wood substrates
• Flexible bond accommodates movement and vibration
• Suitable for bedding railings, fittings and through-hulls

Can I use this sealant outdoors and in sunlight without discoloration?

The compound includes UV-resistant properties to minimize sun degradation and color fading over time. It’s formulated for exposure to sunlight, salt spray and temperature swings common in marine and RV environments.

• UV-resistant to reduce yellowing and breakdown
• Weatherproof for rain, sun and salt exposure
• Maintains flexibility in changing temperatures
• Designed for long-term outdoor durability

What comes in the package and how easy is it to apply?

The 2-pack ships with two 310ml cartridges, each fitted with an applicator nozzle and a pair of nitrile gloves for a cleaner, controlled application. The included nozzle helps you cut the bead size you need, and the cartridge fits standard caulking guns for both DIY and professional use.

• Two 310ml cartridges, black color
• Pre-attached applicator nozzles for precise beads
• Nitrile gloves included to keep hands clean
• Compatible with standard caulking guns

Who is this for: Calvana 5200 is intended for boat owners, marine technicians, RV enthusiasts and general contractors who need a permanent, high-strength seal in challenging outdoor conditions. If you’re sealing deck hardware, bedding fittings, repairing hulls or performing through-hull installations that demand UV resistance and underwater bonding, this fast-curing two-pack is built to meet those needs without specialty tools or long cure delays.