Will this work to fasten galvanized sheet metal to a aluminum boat ?

Depends on the load. If you remove the patina (sand or wire brush until they look shiny) from both surfaces and there is sufficient bonding area it should.Make certain the joint is secured until the adhesive is fully cured.

Will this work on a 2 inch pvc pipe coupling that is under water

If the coupling is underwater and can't be moved out of the water, or the water drained, then this would be the best chance for a repair of anything I know. I would clean and steel wool the surface before putting this on. I'm just guessing at what the situation is and if this would be a solution. But I'm really impressed with 3m 05220. It was made to stick stuff like speed sensors on the fiberglass hulls of boats while they are still in the water.

does this work on polyethylene (Kayaks)

Yes Once setup you can't remove

Can the adhesive be sanded

Once fully cured it can be sanded. It will fill the sand paper a bit. As with any adhesive, the quality of the surface prep will determine how well the product sticks to the surfaces and thus how finely you can feather the product.

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3M Marine Adhesive Sealant 5200FC Fast Cure, White, 10 fl oz Cartridge

3M Marine Adhesive Sealant 5200FC Fast Cure, White, 10 fl oz Cartridge

Product ID: 2635804

Details

Brand
3M
Item Form
Liquid
Material
Plastic
Special Feature
Strong
Specific Uses For Product
Fleet and

⚓600 psi tensile strength

🌊Waterproof above & below waterline

⏱️Tack-free in 1-2 hours

R1357

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Description

⚓ Seal the deal fast, stay flexible forever!

RAPID READY SEAL - Fast curing formula goes tack-free in just 1-2 hours, so your projects stay on schedule without compromise.
ALL WEATHER WARRIOR - Resists saltwater, weathering, and shock both above and below the waterline—built to endure every wave.
FLEXIBLE YET DURABLE - Elastomeric bond absorbs vibration, swelling, shrinking, and shock, ensuring long-lasting, stress-free seals.
MULTI SURFACE MASTERY - Bonds wood, fiberglass, metal, and more—versatility that keeps your marine repairs and builds seamless and professional.
UNMATCHED MARINE STRENGTH - 600 psi tensile strength for permanent, rock-solid bonds that withstand the harshest marine conditions.

3M Marine Adhesive Sealant 5200FC is a high-strength, fast-curing polyurethane sealant designed for permanent, flexible bonds in demanding marine environments. Tack-free in 1-2 hours and fully cured in 48, it resists saltwater, weathering, and mechanical stress above and below the waterline. Ideal for bonding wood, fiberglass, metal, and more, it delivers durable, waterproof seals for professional-grade marine applications.

Specifications

ASIN	B000XBFCUO
Best Sellers Rank	#2,716 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #17 in Industrial Joint Sealants
Brand Name	3M
Color	White
Compatible Material	Ceramic
Container Type	Cartridge
Customer Reviews	4.6 4.6 out of 5 stars (9,024)
Full Cure Time	48 hours
Global Trade Identification Number	00051135065204
Included Components	3m marine sealant
Item Form	Liquid
Item Package Quantity	1
Item Type Name	3M 06520 Marine Adhesive/Sealant 5200 Fast Cure, 1/10 Gallon / White
Item Weight	13.92 ounces
Manufacturer	3M
Material Type	Plastic
Model	5200FC
Number of Pieces	1
Other Special Features of the Product	Strong,Waterproof
Part Number	00051135065204
Specific Uses For Product	Fleet and plant maintenance.
Tensile Strength	600 psi
UPC	051135065204
Unit Count	10 Fluid Ounces
Viscosity Level	High
Volume	10 fluid ounces
Water Resistance Level	Water Resistant

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R1357

Duties & taxes included

In stock

Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to South Africa.

Secure transaction

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