Super glue (cyanoacrylate or CA) bonds plastic, metal, ceramic, rubber, leather, and wood in seconds with a single drop. The wrong CA dries to a brittle film that cracks under stress, fails on the porous wood and rubber repairs you need it for, or arrives clogged because it sat on a warehouse shelf for two years. After comparing 14 current super glues across hobby, repair, and industrial grades, these seven stood out for bond strength, viscosity range, applicator design, and shelf life.
Picks were narrowed by viscosity, set time, gap-fill capability, applicator type, and packaging.
Quick Comparison
| Glue | Viscosity | Set time | Gap fill | Bond strength | Best for |
|---|---|---|---|---|---|
| Loctite Ultra Gel Control | Gel | 30-60 sec | 0.04 in | 3500 PSI | Overall |
| Gorilla Super Glue Gel | Gel | 10-30 sec | 0.04 in | 3000 PSI | Vertical surfaces |
| Bob Smith IC-2000 Rubber Toughened | Medium | 15-25 sec | 0.02 in | 4500 PSI | Impact resistance |
| Starbond EM-150 Medium | Medium | 10-15 sec | 0.01 in | 3500 PSI | Wood and pen turning |
| Loctite Super Glue Liquid | Thin | 5-15 sec | None | 3000 PSI | Tight cracks |
| 3M Scotch-Weld CA8 | Thin | 5-10 sec | None | 4000 PSI | Industrial |
| Krazy Glue All Purpose | Thin | 10-30 sec | None | 2500 PSI | Budget |
Loctite Ultra Gel Control, Best Overall
The Loctite Ultra Gel Control adds a rubber-tough additive to standard cyanoacrylate, which boosts impact and shock resistance over plain CA. The side-squeeze bottle dispenses precise drops without finger fatigue, and the gel viscosity stays put on vertical and overhead surfaces. Sets in 30 to 60 seconds with full cure in 24 hours. Bonds plastic, metal, rubber, leather, wood, and ceramic.
Resealable cap with anti-clog tip extends shelf life beyond standard CA bottles. Two year shelf life unopened.
Trade-off: gel viscosity slower than thin liquid CA for tight crack repair. Pair with a thin CA for full coverage.
Gorilla Super Glue Gel, Best Vertical Surfaces
Gorilla Super Glue Gel is a high-viscosity CA gel that holds in place on overhead and vertical surfaces without running. Sets in 10 to 30 seconds with full cure in 24 hours. Anti-clog cap with metal pin maintains tip flow across multiple uses.
3000 PSI bond strength. Sold in 20-gram bottles or single-use 3-gram tubes for occasional users.
Trade-off: faster set time than Loctite Ultra Gel reduces repositioning window. Set parts in place before opening the cap.
Bob Smith IC-2000 Rubber Toughened, Best Impact Resistance
Bob Smith Industries IC-2000 is a rubber-toughened CA used by RC car racers and drone builders because it absorbs vibration and impact without cracking. Standard CA shatters under shock; IC-2000 flexes 5 to 10 percent before failing. Black color blends into rubber tires, fenders, and dark plastics. Sets in 15 to 25 seconds.
4500 PSI bond strength. Used as the standard adhesive on RC race tires and drone arm reinforcement.
Trade-off: black color is wrong for clear or light-colored repairs. Use Loctite Ultra Gel for visible bonds.
[Starbond EM-150 Medium](https://www.amazon.com/s?k=Starbond EM-150+Medium&tag=thetestedhub-20), Best Wood And Pen Turning
Starbond EM-150 is medium-viscosity CA preferred by woodworkers, pen turners, and luthiers for crack filling, knot stabilization, and finish use. Soaks into wood pores 0.05 inches deep then sets in 10 to 15 seconds with accelerator. Combine with sawdust to fill voids invisibly. Refrigerator-stable for 30 month shelf life.
Comes in 2 oz, 8 oz, and 16 oz bottles for shop use. Includes extra applicator tips.
Trade-off: bulk packaging is overkill for single-repair users. Buy the 2 oz for occasional use.
Loctite Super Glue Liquid, Best For Tight Cracks
Loctite Super Glue Liquid is the thin-viscosity CA that wicks into hairline cracks by capillary action and sets in 5 to 15 seconds. Use it on tight-fitting parts where gel CA would not penetrate. Single-use 0.07 oz tubes prevent shelf-life waste. Multi-pack format covers occasional users.
3000 PSI bond strength.
Trade-off: thin liquid runs on vertical surfaces. Use gel for overhead work.
3M Scotch-Weld CA8, Best Industrial
3M Scotch-Weld CA8 is industrial-grade CA used in manufacturing, electronics, and medical assembly. 4000 PSI bond strength is the highest in this lineup. Thin viscosity wicks into machined fits. Sets in 5 to 10 seconds.
50-gram bottle with precision tip applicator. Refrigerator-stable.
Trade-off: 2x the price of consumer CA. Justified for production work and critical bonds.
Krazy Glue All Purpose, Best Budget
Krazy Glue All Purpose is the original CA brand in a single-use 0.07 oz tube format that fits in a desk drawer or junk drawer for emergency repairs. 2500 PSI bond strength. Single-use tubes prevent the half-used-bottle-clogs problem.
Available in multi-pack of 12.
Trade-off: bond strength lags premium CAs. Acceptable for casual occasional use.
How To Choose
Match viscosity to the gap
Thin liquid for tight cracks. Medium for general repair. Gel for vertical, overhead, and gap-filling work.
Rubber-toughened for impact loads
RC cars, drones, and anything that gets dropped need rubber-toughened CA. Plain CA shatters under shock.
Shelf life matters
Buy small quantities for occasional use. Refrigerate bulk bottles. A new bottle outperforms an old one regardless of premium grade.
Have CA accelerator on hand
Spray accelerator drops set times from 30 seconds to under 2 seconds for tricky repairs. Worth keeping on the bench.
For related reading, see our breakdowns of best epoxy adhesives 2026 and how to glue plastic together permanently. For how we evaluate adhesives, see our methodology.
Super glue is the most versatile adhesive in the household toolbox when matched to the application. Stock thin liquid, medium gel, and rubber-toughened in the workshop drawer, and most repairs come together in under a minute.
Frequently asked questions
Why does super glue not work on some plastics?+
Polyethylene and polypropylene (PE and PP, used for milk jugs, ketchup bottles, and many food containers) have a low surface energy that cyanoacrylate cannot wet properly. The glue beads up and never bonds. Use a CA primer (such as Loctite Plastics Bonder primer or 3M Polyolefin Adhesion Promoter) on PE and PP first, or switch to a polyurethane adhesive like Gorilla Glue Original. ABS, PVC, polystyrene, and acrylic bond fine with standard CA.
Does super glue work on metal?+
Yes, CA bonds metal to metal and metal to most other materials in 10 to 30 seconds. Clean the metal surface with isopropyl alcohol first to remove oils. Aluminum bonds slightly slower than steel because of the surface oxide layer; lightly sand aluminum with 220-grit sandpaper before gluing for the best bond. Metal-to-metal bonds reach roughly 2000 to 3000 PSI shear strength, enough for most repairs but not load-bearing structural use.
How do I unstick super glue from skin?+
Acetone (pure or nail polish remover) dissolves cyanoacrylate. Soak the bonded area in warm soapy water for 5 minutes first to soften the bond, then apply acetone with a cotton swab. Do not pull the bonded skin apart; you'll tear the skin before the glue gives. Most accidental skin bonds release within 2 to 4 hours from natural skin oils. Keep a small bottle of acetone in the workshop next to the glue.
Gel or liquid super glue?+
Liquid CA wicks into tight cracks by capillary action and sets in 5 to 30 seconds, which is ideal for hairline cracks, porous materials, and exact-fit parts. Gel CA stays where you put it on vertical surfaces, fills gaps up to 0.04 inches, and sets in 30 to 60 seconds. Use liquid for fine repairs and gel for gap-filling or overhead work. Most pros keep both on the bench.
Does super glue expire?+
Unopened CA shelf life is 12 to 24 months at room temperature, 30 to 36 months refrigerated. Opened bottles last 1 to 6 months because exposure to humidity accelerates polymerization in the bottle. Store the bottle upright with the cap tight, ideally in a sealed bag in the refrigerator (let it warm to room temp before opening to prevent condensation inside). When the glue thickens or strings, replace it.
Morgan Davis
Morgan Davis writes for The Tested Hub.