3M Marine Adhesive Sealant 5200, Mahogany, 10 oz vs Great Stuff Extreme Sealant 3-Pack White 14 oz Aerosol
Overall winner: 3M Marine Adhesive Sealant 5200, Mahogany, 10 oz
Key Differences
3M 5200 (A) is a marine-grade polyurethane adhesive sealant noted for flexibility, weather and salt water resistance, and long work time, with a higher user rating (4.50 from 9,300 reviews). Great Stuff Extreme (B) is a Kevlar-enhanced rubber spray sealant sold as a 3-pack, offers ultra long-lasting waterproof and UV resistance but has a lower rating (4.10 from 158 reviews) and reports of the spray nozzle popping off
3M Marine Adhesive Sealant 5200, Mahogany, 10 oz
Polyurethane sealant for marine use that stays flexible and weather/salt resistant. Some users report strong adhesion while others experience spots that don’t adhere; curing can take days
Pros
- remains flexible
- weather and salt water resistant
- strong initial seal
Cons
- mixed adhesion reliability
- long curing time
- nozzle tip not included
Great Stuff Extreme Sealant 3-Pack White 14 oz Aerosol
Premium flexible rubber sealant with Kevlar for waterproof seals in extreme conditions. Applies a professional-grade coating to seal, repair, and protect surfaces from water and air leaks; highly UV-resistant for longevity
Pros
- Kevlar-reinforced rubber sealant
- High waterproof and air-leak protection
- UV-resistant for longevity
- Protects against rust, corrosion, and rot
Cons
- Mix of adhesion feedback from customers
- spray nozzle issues reported by one user
Head-to-Head
| Criteria | Winner |
|---|---|
| Price | 3M |
| Durability | 3M |
| Versatility | 3M |
| User Reviews | 3M |