Gorilla Glue 113442 Ultimate Black Epoxy Adhesive is a 0.85 fl. oz. two-part epoxy in a dual syringe for permanent repairs and gap-filling bonds across a wide range of materials. This is a 2-part epoxy adhesive designed for gap-filling repairs and permanent bonding on interior and exterior projects. Model 113442 is a good fit for users who need more holding power than a basic household glue and want a black-cure formula for repairs where the bond line will stay visible.

The headline spec here is bond strength. Gorilla rates this Ultimate formula at up to 4,250 PSI, which puts it in the heavy-duty category for epoxy adhesives. In practical terms, that means it is built for structural-style repairs on metal, wood, ceramic, tile, glass, concrete, fiberglass, and many plastics where a weaker adhesive can crack loose or fail when the part is stressed. It also works as a gap filler, so it can help on uneven surfaces instead of only on tight, perfect joints.

The 10-minute set time is a useful middle ground. It is fast enough to keep small repairs moving, but not so fast that you have no working time once the parts are mixed. Source directions note that the mixed epoxy should be applied within about 3 minutes for best bond strength, then clamped and left undisturbed for 30 minutes, with full cure in 24 hours. That makes it well suited for repair work, fixture touch-ups, masonry fixes, countertop work, and general shop use where you want speed without rushing into a panic.

The dual-barrel syringe design matters because it keeps the resin and hardener separated until you dispense them. That helps with shelf life, keeps the ratio consistent, and makes small-batch mixing easier than dealing with separate bottles. The package also provides a mixing tray and stir stick, which is the kind of simple jobsite detail that saves time when you only need a quick repair and do not want to hunt around for disposable mixing supplies.

For real-world conditions, this epoxy is built to handle more than a dry indoor repair. It is rated waterproof, moisture resistant, heat resistant, UV resistant, and solvent resistant, and it is intended for both interior and exterior use. That makes it a strong option for repairs exposed to weather, splash, or changing temperatures. The important limitation is material compatibility: it bonds many common materials, but it is not recommended for polyethylene, polypropylene, or similar plastics, and source data also notes it is not for below-waterline use.

Another practical advantage is the black cure. That matters when the repair line is visible on dark materials, hardware, trim details, housings, or equipment parts where a clear or gray adhesive would stand out. It is also paintable, sandable, and stainable once cured, which gives you more control when appearance matters after the bond is complete.

If you need a general-purpose adhesive for lightweight craft work, this is probably more epoxy than you need. If you are doing repair work on mixed materials and want fast setup, strong hold, weather resistance, and a syringe that is easy to control, this one makes sense. It is especially well suited for homeowners, maintenance techs, remodelers, and serious DIY users who want one heavy-duty epoxy adhesive ready for metal, concrete, ceramic, wood, glass, and fiberglass repairs.

Gorilla Glue 113442 Ultimate Black Epoxy Adhesive is the right pick when the repair actually has to stay repaired

This is a strong, practical epoxy for mixed-material fixes where fast setup, weather resistance, and a visible black cure all matter.

• Who it's for: Homeowners, maintenance crews, remodelers, and serious DIY users doing repair work on metal, ceramic, concrete, glass, fiberglass, wood, and similar materials.
• Why it stands out: The 4,250 PSI rating, 10-minute set time, waterproof performance, and easy syringe delivery give it a useful edge over lighter-duty epoxies.
• Worth knowing: It is versatile, but not universal. Skip it for polyethylene, polypropylene, and similar plastics, and do not treat waterproof as the same thing as below-waterline rated.

• How long does this epoxy take to set? It sets in about 10 minutes, with full cure listed at 12 to 24 hours depending on conditions.
• Can it be used outdoors? Yes. Source data lists it for interior and exterior use, and it is rated waterproof, UV resistant, moisture resistant, and heat resistant.
• What materials will it bond? It is intended for materials including metal, wood, ceramic, tile, glass, concrete, brick, fiberglass, rubber, stone, and many plastics.
• Does it dry clear? No. This formula cures black.
• Can it be finished after curing? Yes. Source data lists it as paintable, sandable, and stainable.