Description
3M™ Marine Adhesive Sealant 5200 Fast Cure – 88.7ml Tube & 296ml Cartridge
3M™ Marine Adhesive Sealant 5200 is a high-performance white polyurethane sealant designed for marine and recreational applications. It offers exceptional strength and durability, maintaining its bond both above and below the waterline. This fast-curing sealant chemically reacts with moisture to create strong, flexible bonds with wood and fibreglass.
Key Features
- Watertight bonding and sealing of gelcoat, fibreglass, and wood
- Ideal for through-hull fastening, deck fittings, railings, and transducers
- Flexible to accommodate structural movement
- Cures fully in 24 hours, with a full cure rate of 3 mm per 5 days
- Very high strength permanent bond on wood and fibreglass
- Excellent resistance to weathering and salt water
- Adhesive type: Polyurethane
- Application method: Hand or pressure caulk gun
- Colour: White
- Elongation: >700%
- Hardness: 68 Shore A
- Physical form: Medium paste
- Solids weight percentage (approximate): 97%
- Tack free time: 12 hours
Applications
This sealant is ideal for a wide range of bonding and sealing jobs including:
- Fibreglass deck to fibreglass hull
- Wood to fibreglass joints
- Portholes and deck fittings installation
- Motors mounted on fibreglass transoms
- Under mouldings and hull seams above and below the waterline
- Centre board trunk joints, between struts and planking, stern joints, deck housing, etc.
Usage Tips
- Apply easily with a manual caulking gun.
- Won’t sag or flow in vertical or horizontal seams, ensuring neat application.
- Ensure surfaces are clean and dry before application for the best bond.
- Allow the product to cure fully before exposing it to water for maximum strength.
Product Options
| Part Number | Size | Pack Size | Colour |
|---|---|---|---|
| 5220 | 88.7 ml | 1 tube | White |
| 6520 | 296 ml | 1 cartridge | White |
| 6520-12 | 296 ml | 12 cartridges | White |
Industries: Construction, General Industrial, Marine, Specialty Vehicle, Transportation. Warning:
Use in well-ventilated areas. Avoid contact with skin and eyes. Keep out of reach of children. Follow all safety instructions on the packaging.
Frequently Asked Questions (FAQs)
How long does it take for the sealant to cure fully? The sealant cures at approximately 3 mm per 5 days, with a full cure expected after about five days depending on bead size and environmental conditions. Is this adhesive safe for underwater applications? Yes, it creates watertight seals both above and below the waterline and is ideal for through-hull fittings. Can it be painted over? This polyurethane sealant can be painted after it has fully cured, but always test first on a small area. Does it remain flexible after curing? Yes, it stays flexible allowing for structural movement caused by vibration or swelling.
Boat Hut Insight
If you’re thinking of using this sealant for your boat or caravan project, remember that while it’s incredibly strong and flexible, it’s also a bit like that friend who sticks around no matter what — once it’s bonded, removing or repositioning parts can be quite a challenge! So plan your applications carefully to avoid any “oops” moments. Also, consider that its high elongation means it’s perfect if your vessel or RV experiences temperature swings causing materials to expand or contract — this flexibility helps maintain the integrity of your seals over time. Pro Tip: When applying in cooler weather, warm the sealant tube slightly to improve flow and adhesion. This helps with smoother application and better bonding strength.
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