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20 Best Sealer For Aluminum Boats (2023 Updated)

Sealer for aluminum boats is a product that is used to protect the hull of the vessel from corrosion. The sealer is applied to the outside of the hull and creates a barrier between the metal and the water.

This barrier helps to prevent the water from coming into contact with the metal and causing it to corrode.

20 Best Sealer For Aluminum Boats

Product Image Product Name Features Price

3M 5200 10 oz. Marine Adhesive/Sealant, White

  • 10 oz

3M 05220 Marine Adhesive Sealant Fast Cure 5200, White – 3 oz.

  • Fully cures in approximately 24 hours
  • Extremely strong seal retains its strength above or below the waterline
  • Stays flexible and allows for structural movement

BoatLIFE Life Calk Sealant Tube 2.8 fl. oz. Black

  • Long lasting
  • Permanently flexible
  • For use above or below the waterline

3M 1 oz. White Marine Adhesive Sealant 5200

  • Fiberglass deck to hull
  • Through hull fittings
  • Wood to fiberglass

3M Marine Adhesive Sealant Fast Cure 5200 (06520) Permanent Bonding and Sealing for Boats and RVs Above and Below The Waterline Waterproof Repair,

  • 10 Fl.oz Cartridge

3M 4200 Marine Adhesive Sealant Fast Cure – Black

  • Super high strength
  • Bonds are watertight
  • Use for both above and below waterline

Seal-Once So7614 1 Gal Marine Premium Wood Sealer

  • 1 Gallon

NP1 Polyurethane Sealant

  • Interior and exterior
  • Above and below grade
  • Aluminum and wood window frames

Dicor Non-Leveling Lap Sealant, White – 10.3 fl oz bottle

  • Color: White
  • Create watertight seals
  • Remains flexible

3M Marine Grade Silicone Sealant , Clear – 10 fl oz

  • DEVELOPED SPECIFICALLY AS A MARINE SEALANT – Stays tough and flexible for a wide range of uses above the waterline.
  • VERY VERSATILE – Works on bare and painted metal, glass, paint, fiberglass, non-oily woods, many plastics and abraded rubbers.

Dap Auto/Marine Sealant 2.8 oz

  • The product is manufactured in United States
  • The product is easy to use
  • The product is durable

TotalBoat Aluminum Boat Leak Sealer 250 ml.

  • Can be applied to properly prepared aluminum surfaces when the air and substrate temperature is as low as 40°F.
  • Resin and hardener come in a single cartridge and are dispensed automatically at the proper ratio. No mixing. No mess to clean up.

TotalBoat Seal Elastomeric Marine Sealant 10 oz Cartridge White

  • 10 oz

Amazing Goop 5400040 Coat-It Waterproof Epoxy Sealer & Protector – 2 lb Kit

  • 2 lb

3M 06535 Marine Adhesive Sealant 5200 Fast Cure White, 1 oz Tube

  • High performance polyurethane adhesive/sealant becomes tack-free in 48 hours, cures completely in 5-7 days
  • Strong seal retains strength above or below the water line

BoatLIFE 1151 Silicone Rubber Sealant Cartridge – White

  • All-purpose, non-corrosive, acid free, non-yellowing, mildew resistant, low-odor, 100% marine high quality silicone sealant

3M 5200 Marine Adhesive Sealant 3 oz – White

  • Fiberglass deck to hull
  • Through hull fittings
  • Wood to fiberglass

TotalBoat Penetrating Epoxy Sealer Cold Weather Pint 492063

  • Pint
3M 5200 10 oz. Marine Adhesive/Sealant, White
  • 10 oz
3M 05220 Marine Adhesive Sealant Fast Cure 5200, White – 3 oz.
  • Fully cures in approximately 24 hours
  • Extremely strong seal retains its strength above or below the waterline
  • Stays flexible and allows for structural movement
BoatLIFE Life Calk Sealant Tube 2.8 fl. oz. Black
  • Long lasting
  • Permanently flexible
  • For use above or below the waterline
3M 1 oz. White Marine Adhesive Sealant 5200
  • Fiberglass deck to hull
  • Through hull fittings
  • Wood to fiberglass
3M Marine Adhesive Sealant Fast Cure 5200 (06520) Permanent Bonding and Sealing for Boats and RVs Above and Below The Waterline Waterproof Repair,
  • 10 Fl.oz Cartridge
3M 4200 Marine Adhesive Sealant Fast Cure – Black
  • Super high strength
  • Bonds are watertight
  • Use for both above and below waterline
Seal-Once So7614 1 Gal Marine Premium Wood Sealer
  • 1 Gallon
NP1 Polyurethane Sealant
  • Interior and exterior
  • Above and below grade
  • Aluminum and wood window frames
Dicor Non-Leveling Lap Sealant, White – 10.3 fl oz bottle
  • Color: White
  • Create watertight seals
  • Remains flexible
3M Marine Grade Silicone Sealant , Clear – 10 fl oz
  • DEVELOPED SPECIFICALLY AS A MARINE SEALANT – Stays tough and flexible for a wide range of uses above the waterline.
  • VERY VERSATILE – Works on bare and painted metal, glass, paint, fiberglass, non-oily woods, many plastics and abraded rubbers.
Dap Auto/Marine Sealant 2.8 oz
  • The product is manufactured in United States
  • The product is easy to use
  • The product is durable
TotalBoat Aluminum Boat Leak Sealer 250 ml.
  • Can be applied to properly prepared aluminum surfaces when the air and substrate temperature is as low as 40°F.
  • Resin and hardener come in a single cartridge and are dispensed automatically at the proper ratio. No mixing. No mess to clean up.
TotalBoat Seal Elastomeric Marine Sealant 10 oz Cartridge White
  • 10 oz
Amazing Goop 5400040 Coat-It Waterproof Epoxy Sealer & Protector – 2 lb Kit
  • 2 lb
3M 06535 Marine Adhesive Sealant 5200 Fast Cure White, 1 oz Tube
  • High performance polyurethane adhesive/sealant becomes tack-free in 48 hours, cures completely in 5-7 days
  • Strong seal retains strength above or below the water line
BoatLIFE 1151 Silicone Rubber Sealant Cartridge – White
  • All-purpose, non-corrosive, acid free, non-yellowing, mildew resistant, low-odor, 100% marine high quality silicone sealant
3M 5200 Marine Adhesive Sealant 3 oz – White
  • Fiberglass deck to hull
  • Through hull fittings
  • Wood to fiberglass
TotalBoat Penetrating Epoxy Sealer Cold Weather Pint 492063
  • Pint

1. 3M 5200 10 oz. Marine Adhesive/Sealant, White

3M 5200 10 oz. Marine Adhesive/Sealant, White

  • 10 oz

Check Latest Price

Sold By Price
Amazon.com
Home Depot
Jamestown Distributors
West Marine

Product Details

Specifications

Details
Brand 3M
Chemical Base Polyurethane
Cure Time 5 days
Exact Fixture Time 30 hr
Color White

Reviews From Real Customers

conjoin
DaleW
captsteve

2. 3M 05220 Marine Adhesive Sealant Fast Cure 5200, White – 3 oz.

3M 05220 Marine Adhesive Sealant Fast Cure 5200, White - 3 oz.

  • Fully cures in approximately 24 hours
  • Extremely strong seal retains its strength above or below the waterline
  • Stays flexible and allows for structural movement
  • Effectively absorbs stress caused by shock, vibration, swelling or shrinking
  • Excellent resistance to weathering and saltwater

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Sold By Price
Amazon.com
eBay
Walmart
Home Depot

Product Details

Specifications

Details
Brand 3M
Chemical Base Polyurethane
Cure Time 24 hr
Exact Fixture Time 60 min
Color White

Reviews From Real Customers

Disappointed boater
leach2348
KC

3. BoatLIFE Life Calk Sealant Tube 2.8 fl. oz. Black

BoatLIFE Life Calk Sealant Tube 2.8 fl. oz. Black

  • Long lasting
  • Permanently flexible
  • For use above or below the waterline
  • Colour: Black
  • Colour: White

Check Latest Price

Sold By Price
Amazon.com – Seller
eBay
Defender Industries
West Marine

Product Details

Specifications

Details
Theme Type Adhesive & Sealants

Reviews From Real Customers

Spruce Root Canoe
RLeiter
F.P.

4. 3M 1 oz. White Marine Adhesive Sealant 5200

3M 1 oz. White Marine Adhesive Sealant 5200

  • Fiberglass deck to hull
  • Through hull fittings
  • Wood to fiberglass
  • Portholes and deck fittings
  • Motors on fiberglass transoms

Check Latest Price

Sold By Price
Amazon.com
eBay
Walmart
Defender Industries

Product Details

Specifications

Details
Brand 3M
Chemical Base Polyurethane
Material Compatibility Fiberglass; FRP; Glass; Metal; Plastic; Wood
Cure Time 5 days
Exact Fixture Time 30 hr

Reviews From Real Customers

Ronald
kickask

5. 3M Marine Adhesive Sealant Fast Cure 5200 (06520) Permanent Bonding and Sealing for Boats and RVs Above and Below The Waterline Waterproof Repair,

3M Marine Adhesive Sealant Fast Cure 5200 (06520) Permanent Bonding and Sealing for Boats and RVs Above and Below The Waterline Waterproof Repair,

  • 10 Fl.oz Cartridge

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Sold By Price
Amazon.com

Product Details

Specifications

Details
Compatible Material Aluminum,Wood,Industrial
Item Package Quantity 1
Item Volume 10 Fluid Ounces
Water Resistance Level Waterproof
Tensile Strength 600 PSI

Reviews From Real Customers

capt steve
Jetdoctor
JB

6. 3M 4200 Marine Adhesive Sealant Fast Cure – Black

3M 4200 Marine Adhesive Sealant Fast Cure - Black

  • Super high strength
  • Bonds are watertight
  • Use for both above and below waterline
  • Weathering and saltwater resistant

Check Latest Price

Sold By Price
Amazon.com – Seller
eBay
Walmart
West Marine

Product Details

Specifications

Details
Brand 3M
Cure Time 24 hr
Exact Fixture Time 60 min
Color Black
Product Form Paste

Reviews From Real Customers

Shamu
Alan F
Ron in the sun

7. Seal-Once So7614 1 Gal Marine Premium Wood Sealer

Seal-Once So7614 1 Gal Marine Premium Wood Sealer

  • 1 Gallon

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Sold By Price
Amazon.com – Seller
eBay
Walmart
Home Depot

Product Details

Specifications

Details
Weight 10 lb

8. NP1 Polyurethane Sealant

NP1 Polyurethane Sealant

  • Interior and exterior
  • Above and below grade
  • Aluminum and wood window frames

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Sold By Price
Amazon.com – Seller
Lowe’s
Builders Warehouse
Valu Home Centers

Product Details

Specifications

Details
Paintable Yes
Container Size 10.1-oz
Package Quantity 1
Heat Resistance in Degrees F Up to 225
Mold Resistant Yes

Reviews From Real Customers

Wixx
joec3948
bermansinc

9. Dicor Non-Leveling Lap Sealant, White – 10.3 fl oz bottle

Dicor Non-Leveling Lap Sealant, White - 10.3 fl oz bottle

  • Color: White
  • Create watertight seals
  • Remains flexible
  • Does not stain

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Sold By Price
Amazon.com
eBay
Walmart
Camping World

Product Details

Specifications

Details
Item Dimensions LxWxH 2 x 1 x 11.3 inches
Compatible Material Metal
Is Stain Resistant Yes
Product Dimensions 2 x 1 x 11.3 inches
Country of Origin China

Reviews From Real Customers

Tom4628
campingworld.com
briana5340

10. 3M Marine Grade Silicone Sealant , Clear – 10 fl oz

3M Marine Grade Silicone Sealant , Clear - 10 fl oz

  • DEVELOPED SPECIFICALLY AS A MARINE SEALANT – Stays tough and flexible for a wide range of uses above the waterline.
  • VERY VERSATILE – Works on bare and painted metal, glass, paint, fiberglass, non-oily woods, many plastics and abraded rubbers.
  • EASY TO USE – Applies right from the container and requires no mixing.
  • HELPS KEEP WATERCRAFT LOOKING SHARP – Resists temperatures and won’t turn yellow over time.

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Sold By Price
Amazon.com
West Marine
National Supply Direct
Bottom Paint Store

Product Details

Specifications

Details
Brand 3M
Color Clear
Chemical Base Resin
Cure Time 24 hr
Product Form Paste

Reviews From Real Customers

S.O.
l.
Jpage

11. Dap Auto/Marine Sealant 2.8 oz

Dap Auto/Marine Sealant 2.8 oz

  • The product is manufactured in United States
  • The product is easy to use
  • The product is durable
  • 100-Percent silicone rubber seals and bonds for automotive and marine maintenance and repair
  • Stays waterproof and weatherproof

Check Latest Price

Sold By Price
Amazon.com – Seller
Walmart
Ace Hardware
Cox Hardware and Lumber

Product Details

Specifications

Details
Product Type Auto/Marine Sealant
Color Clear
Number in Package 1 pk
Container Size 2.8 oz
Brand Name DAP

Reviews From Real Customers

HT
ejo-enj-8eitfo9kgf
shadDOWS

12. TotalBoat Aluminum Boat Leak Sealer 250 ml.

TotalBoat Aluminum Boat Leak Sealer 250 ml.

  • Can be applied to properly prepared aluminum surfaces when the air and substrate temperature is as low as 40°F.
  • Resin and hardener come in a single cartridge and are dispensed automatically at the proper ratio. No mixing. No mess to clean up.
  • Available in a handy 250 ml. cartridge that conveniently fits standard caulking guns. Includes 2 static mixing tips.

Check Latest Price

Sold By Price
Amazon
TotalBoat

Product Details

Specifications

Details
Package Dimensions 9.88 x 2.68 x 1.89 inches; 14.57 Ounces
Country of Origin USA
Is Discontinued By Manufacturer No

Reviews From Real Customers

RacerxV6
mike
schreibz

13. TotalBoat Seal Elastomeric Marine Sealant 10 oz Cartridge White

TotalBoat Seal Elastomeric Marine Sealant 10 oz Cartridge White

  • 10 oz

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Sold By Price
Amazon
Jamestown Distributors
TotalBoat

Product Details

Specifications

Details
Is Discontinued By Manufacturer No
Country of Origin USA

Reviews From Real Customers

Pete S
Chuck
SV Solutude

14. Amazing Goop 5400040 Coat-It Waterproof Epoxy Sealer & Protector – 2 lb Kit

Amazing Goop 5400040 Coat-It Waterproof Epoxy Sealer & Protector - 2 lb Kit

  • 2 lb

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Sold By Price
Amazon
eBay
Walmart
Newegg.com – zoro

Product Details

Specifications

Details
Base Type Solvent
Surface Texture Rough, Smooth
Surface Material Aluminum, Fiberglass, Wood
Dry Time 10 to 12 hr
Coverage Area 20 sq ft/kit

Reviews From Real Customers

forsalewhatsbestprice123
jen_-28
annmarimcshan0

15. Dap Aluminum Silicone Sealant

Dap Aluminum Silicone Sealant

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Sold By Price
Amazon
eBay
Walmart – ProMax Commerce
Grainger Industrial Supply

Product Details

Specifications

Details
Brand Dap
Color Aluminum
Chemical Base Silicone
Cure Time 24 hr
Product Form Paste
Package Size 10.1 fl oz
Application Temperature Range -35 to +140 °F
Maximum Operating Temperature +400 °F
Minimum Operating Temperature -40 °F
Shelf Life 18 mo
Package Quantity 12 per case
Standards Met ASTM C719, C920 Class 25, Uses G & A

Reviews From Real Customers

Ceseal

16. 3M 06535 Marine Adhesive Sealant 5200 Fast Cure White, 1 oz Tube

3M 06535 Marine Adhesive Sealant 5200 Fast Cure White, 1 oz Tube

  • High performance polyurethane adhesive/sealant becomes tack-free in 48 hours, cures completely in 5-7 days
  • Strong seal retains strength above or below the water line
  • Excellent resistence to weathering and saltwater

Check Latest Price

Sold By Price
Amazon
Walmart
West Marine
Defender Industries

Product Details

Specifications

Details
Brand 3M
Chemical Base Polyurethane
Cure Time 5 days
Exact Fixture Time 30 hr
Color White

Reviews From Real Customers

WineDown
Dan Boy
stevendarkhorse

17. BoatLIFE 1151 Silicone Rubber Sealant Cartridge – White

BoatLIFE 1151 Silicone Rubber Sealant Cartridge - White

  • All-purpose, non-corrosive, acid free, non-yellowing, mildew resistant, low-odor, 100% marine high quality silicone sealant
  • Superior flexibility and adhesion to fiberglass, plastic, metal, and wood
  • Will not corrode metal

Check Latest Price

Sold By Price
Amazon
eBay
Walmart
Fawcett Marine Supply

Product Details

Specifications

Details
Theme Type Adhesive & Sealants

Reviews From Real Customers

Gary A.
b.
J.C.

18. 3M 5200 Marine Adhesive Sealant 3 oz – White

3M 5200 Marine Adhesive Sealant 3 oz - White

  • Fiberglass deck to hull
  • Through hull fittings
  • Wood to fiberglass
  • Portholes and deck fittings
  • Motors on fiberglass transoms

Check Latest Price

Sold By Price
eBay
Walmart
Lowe’s
Jamestown Distributors

Product Details

Specifications

Details
Brand 3M
Chemical Base Polyurethane
Material Compatibility Fiberglass; FRP; Glass; Metal; Plastic; Wood
Cure Time 5 days
Exact Fixture Time 30 hr

Reviews From Real Customers

slpip
K.M.

19. Flex Seal Liquid Rubber Sealant Coating, 14 oz, Marine, Clear

Flex Seal Liquid Rubber Sealant Coating, 14 oz, Marine, Clear

Check Latest Price

Sold By Price
Walmart
West Marine

Product Details

Specifications

Details
Assembled Product Dimensions (L x W x H) 2.50 x 9.50 x 2.50 Inches

Reviews From Real Customers

SAM64

20. TotalBoat Penetrating Epoxy Sealer Cold Weather Pint 492063

TotalBoat Penetrating Epoxy Sealer Cold Weather Pint 492063

  • Pint

Check Latest Price

Sold By Price
Jamestown Distributors
TotalBoat

Product Details

Specifications

Details
Is Discontinued By Manufacturer No
Country of Origin USA
Item Volume 474 Milliliters
Water Resistance Level Waterproof

Reviews From Real Customers

Shiny-Side-Up
Tripp the bear

Conclusion

There are many different types of sealers available for aluminum boats, and the best type to use will depend on the specific needs of your boat. Some sealers are designed to protect against corrosion, while others are designed to provide a waterproof barrier.

If you are unsure of which type of sealer to use, consult with a professional who can assess your boat and recommend the best option.

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