what is the strongest glue for metal to metal

Adiseal stands out as the strongest glue for metal-to-metal bonding based on independent tests exceeding 3,123 PSI strength.

Multiple products like J-B Weld, Gorilla Glue, and Loctite also perform well in shear tests up to 30 pounds.

Top Contenders

Independent testing by Ultimate Handyman showed Adiseal outperforming competitors by over 3x , holding bonds without failure even as test rigs broke at 3,123+ PSI on metal and wood-to-metal loads. J-B Weld KwikWeld and Gorilla Clear Grip followed in hands-on reviews, supporting 20-30 pounds in shear strength tests while blending seamlessly with metal surfaces. Epoxy- based options like Permatex PermaPoxy hit tensile strengths around 4,500 PSI, ideal for multi-metal repairs.

Glue| Max Strength (PSI)| Type| Best For
---|---|---|---
Adiseal| 3,123+| MS-Polymer| Heavy loads, flexible waterproof bonds 1
Gorilla Clear Grip| ~30 lb shear| Clear adhesive| Visible repairs, impact resistance 3
J-B Weld KwikWeld| High shear (20 lb)| Epoxy| Steel-reinforced durability 39
Loctite Super Glue| Rapid bond| Cyanoacrylate| Quick fixes, clear finish 5
Permatex PermaPoxy| 4,500| Multi-metal epoxy| Automotive, fast cure 7

Application Tips

Clean metal surfaces thoroughly—remove dirt, grease, or oxidation for maximum adhesion, as metals are non-porous. Apply in thin layers, clamp for 24 hours if possible, and work in well-ventilated areas since epoxies and super glues set fast but cure fully over hours. For outdoor or wet use, choose waterproof formulas like Adiseal.

Multiple Viewpoints

Manufacturer Claims vs. Tests: Adiseal's site highlights its record- breaking results, but Bob Vila's 2026 review favored Gorilla for everyday DIY due to ease and value. Forums and YouTube echo J-B Weld for pros needing "liquid metal" strength up to 3,960 PSI tensile. Trend Note (March 2026): Recent guides emphasize epoxies over super glues for vibration-heavy projects like auto repairs.

Why Strength Varies

** PSI measures tensile pull, but shear (side force) matters more for metal- to-metal.** Adiseal excels in load-bearing without brittleness, while super glues like Loctite prioritize speed (60 seconds). Consider gap-filling for uneven surfaces—MS-Polymers handle this better than rigid epoxies.

TL;DR: Adiseal tops charts at 3,123+ PSI for ultimate metal-to-metal strength; J-B Weld or Gorilla suit most DIY needs.

Information gathered from public forums or data available on the internet and portrayed here.