3 Best Epoxy For Aluminum

Aluminum items are revered for their strength.

However, traditional tear and wear can cause them to break down, making them un-useful

But should this mean that this is the end of them? I don’t think so

I have found that with the right epoxy, any item is easily fixable.

Below I will take you through the three best epoxy for aluminum items.

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1. 3M Marine Adhesive Sealant 5200 (05203)

It’s the sealant I use whenever I need to conduct some repairs on the family boat.

It has been designed to withstand water without coming loose or breaking down.

Apart from boats, you can also use it with jet skis, kayaks, and other common marine vehicles.

Key Specifications

• Compatible with wood, fiberglass, and metal
• The container comes with three fluid-ounces
• Its full curing time is 48 hours


• Highly resistant to water
• Affordable
• Flexible when dry


• It takes 48 hours to dry and up to seven days to become fully cured
• It has a strong smell

Reason for Inclusion

DIY home improvements can take on various shapes.

Every once in a while, I found myself having to make repairs on jet skis and boats and need an adhesive that can withstand water contact.

2. Epoxy Paste

If I were to give an example of the best DIY two-component epoxy, this would be it. I have used it as a coat and as a patch with equal efficiency in the past.


I particularly like it because it quickly bonds with all surfaces, except for a few plastics.

Key Specifications

• Paintable
• It weighs 3.36 ounces, and each tube has 60.0 milliliters
• Suitable for molding, filling, sealing, and bonding


• Versatile
• Very strong
• Very short dry time
• Long work time


• It results in an ugly surface (you can always paint it out)
• You need to use it immediately you have mixed it up

Reasons for Inclusion

Things are constantly breaking in the home, and when they do, I need something strong to help fix them.

I found that I can use this epoxy paste to glue (see the best glue for plexiglass here) the aluminum base of a faucet spray to an aluminum sink. How handy is that!

3. MASTERCOOL 90934 Alum Bond A/C Repair Epoxy – 2 oz.

It’s the only epoxy on this list intended to bond with aluminum.

I use it for DIY tasks involving products such as radiators, tanks, water jackets, pumps, and valves.

The two-component epoxy is specially formulated using modified curing agents to guarantee durability and maximum strength.

Key Specifications

• 650 PSI maximum line pressure
• 3500 PSI tensile strength
• 8600 PSI compression strength
• 83D hardness shore


• Easy to use
• Specifically intended for use with aluminum products
• Can be drilled, threaded, and sanded after curing
• It doesn’t take long to cure fully


• Requires a clean surface which means I can’t use it on DIY automotive repairs or improvements on greasy surfaces
• More expensive than the other epoxy for aluminum on this list

Reasons for Inclusion

It doesn’t stick up and is perfect for fixing all aluminum items, from broken ac lines to fan housings.

Bestseller No. 1
Hy-Poxy H-450 Alumbond 6.5 oz Aluminum Putty Repair Kit
  • Epoxy metal weld for aluminum
  • Repairs HVAC, radiators, engine blocks, boat hulls, equipment, appliances
  • Can be drilled, tapped, sanded, threaded and painted
  • Gives you a non rusting, non magnetic aluminum gray color, stays gray even after sanding/polishing
  • Made in the USA
Bestseller No. 2
PLJOFRSHI Metal Glue, 1.76 oz 2 Part Liquid Metal Welding Heavy Duty Epoxy Glue, Marine Filler Repair Putty, High Temperature Resistant Heavy Duty Ab Glue (3Pcs)
  • WHAT This is a two-component heavy duty high temperature resistant epoxy resin glue with capacity of 1.76oz for each(3 per pack), including a set of pusher, scraper and mixed ratio 1:1 syringe. It is a good nontoxic and nonirritating odor cold welding glue that can be used for boats, cars, Oil tanks, water pipes, heaters, vases, fences welding car bumpers, motorcycle crack repair.
  • This epoxy metal glue can meet your needs in most usage scenarios at a very low cost and with guaranteed good quality. can be cured at room temperature, easy to use, good wear resistance, heat resistance, corrosion resistance and impact resistance. is a high strength epoxy adhesive,Can replace traditional complex welding methods for project repair.
  • WHAT CAN BE DONE 5 minutes to set; 24 hours to fully curing; simultaneously weld different materials together, such as metal aluminum, copper, iron, stainless steel, wood, plastic and glass; cured strength up to 4680PSI; be stable between -65 ℃ ~ 287 ℃; cured until gray color; can be drilled, sanded, spray paint colored until your items become original appearance.
  • WHAT CAN BE USED FOR Excellent impact resistance and strength helps to recover your car or boat cracks and holes. It is also suitable for repairing/fastening radiators, water pipes, tanks, pools, oil drums, cracks in bumpers or motorcycle fairings, broken headlight brackets, torn RV paneling fences, vases, swings, etc.
  • HOW TO USE Push out appropriate amount of glue on a flat surface, then use the stirrer to mix evenly (usually 5 minutes, otherwise affect the bonding). Apply the mixture to clean surface of the material to be bonded. Place the parts to be welded in the appropriate position as needed, and leave it horizontally for 24 hours! For pressurized items, it is necessary to wait until they are completely solid before using.
SaleBestseller No. 3
STAR BRITE Waterproof Epoxy Aluminum Putty Stick - Quick & Permanent Repairs for Boats, RVs, Outdrives, Tanks and More - Works Underwater, Easy to Use, Bonds Fast - 4 OZ (087004)
  • STAR BRITE Waterproof Epoxy Aluminum Putty Stick - Quick & Permanent Repairs for Boats, RVs, Outdrives, Tanks and More - Works Underwater, Easy to Use, Bonds Fast - 4 OZ (087004)
  • FAST CURING, TIME-EFFICIENT - Sets in 5-10 minutes and achieves full cure in 60 minutes, perfect for urgent repair needs
  • MULTIPURPOSE USE - Suitable for a variety of applications; boats, gutters, windows, storm doors, AC, machine parts, pipes, tanks, wheels, castings & more
  • EXTREME TEMPERATURE RESILIENCE - Withstands high temperatures, making it perfect for repairing exhaust systems, manifolds, and engine components
  • SIMPLE APPLICATION - Easy to knead and apply without specialized tools, accessible for DIY enthusiasts and professionals
Bestseller No. 4
Technicqll 1 X Epoxy Aluminium Paste for Fixing Cracks in Metal Parts Engine Blocks Heads Broken Threads Etc 100G
  • The packaging include a piece of reinforsement mesh and two plastic spoons
  • possesses the highest adhesion to all hard materials: metals and their alloys and casts
  • as well glass, wood and stone. Characterized by hardness resembling the material to be repaired
Bestseller No. 5
Metal Repair Glue, 2 Pack Professional Grade Metal to Metal Glue Heavy Duty for Metal, Plastics and Ceramics, High-Temperature Heat Resistant Epoxy Glue for Welding Steel, Aluminum, and DIY Craft
  • LONG-LASTING BOND STRENGTH: Our metal epoxy glue is of good quality, your repaired products will last for at least one year. Once cured, metal repair glue can form a strong and stable permanent bond. Compared with traditional epoxy, AB epoxy glue is high adhesion and good hardness, and a certain toughness.
  • WIDE APPLICATION: Our metal repair glue is suitable for repairing bonding metals, ceramics, glass, and many plastics. It not only can be used to repair fuel tanks, plumbing, concrete breaks, water tank, and plastic bucket but can be used for boats, cars, fuel tanks, heaters, vases, fence welding car bumpers, and motorcycle crack repair.
  • SAFE AND CLEAN: Our metal to metal glue is a clean, odorless, and environmentally friendly product. We insist on the production of exclusive metal glue formula. We take environmental protection as the concept, to ensure that your repaired products are safe and clean.
  • SIMPLE TO USE: The way to use our metal glue heavy duty is very simple. First, please make the surface clean before the process. Then, Use the pusher to push out the appropriate amount of glue at a 1:1 ratio on a flat surface, and use the stirrer to mix it evenly (usually 5 minutes, if not, it will affect the bonding effect). Last, apply it to the surface and give it 24 hours for full curing.
  • COMPLETE ACCESSORIES: Our metal glue has a complete set of accessories, including A and B metal adhesive (80g*2), disposable gloves*2, wooden stirring rod*4, stirring plate*2. Quickly repair damaged areas, the complete kit is more convenient to use and less likely to get dirty hands or other parts of the home.

So, What’s The Best Epoxy for Aluminum?

The 3 best epoxy for aluminum is as follows :

  1. 3M Marine Adhesive Sealant 5200 (05203)
  2. Epoxy Paste
  3. MASTERCOOL 90934 Alum Bond A/C Repair Epoxy – 2 oz.

If I had to pick one from the three, it would be MASTERCOOL 90934 Alum Bond A/C Repair Epoxy – 2 oz.

While it’s a bit costly than the others, it’s the only epoxy designed for bonding with aluminum products.

Essentially, this means it will get the job done.

Last update on 2024-07-23 / Affiliate links / Images from Amazon Product Advertising API