Epoxy is a two-part adhesive made up of a resin and a hardener. When the two components are mixed together in equal parts, a chemical reaction occurs that causes the mixture to cure and harden into a durable, rock-solid bond. The mixture will begin to warm up during mixing — this is a normal part of the curing process. Once fully cured, epoxy creates a strong, permanent bond that resists impact, moisture, and stress far beyond what standard glues can achieve.

The two products differ in set time, strength, color, and water protection. Gorilla Epoxy (Clear) sets in 5 minutes, cures clear, is water resistant, and reaches up to 3,300 PSI of strength — making it ideal for indoor household repairs and projects where a clean, invisible bond matters. Gorilla Epoxy Ultimate sets in 10 minutes, cures black, is fully waterproof, and reaches up to 4,250 PSI — making it the better choice for heavy-duty repairs, outdoor projects, and surfaces regularly exposed to moisture.

Gorilla Epoxy is designed for versatility and bonds strongly to a wide range of materials including metal, wood, glass, ceramic, stone, most plastics*, tile, and fiberglass.

*Not recommended for use on polyethylene or polypropylene plastics.

Both Gorilla Epoxy and Gorilla Epoxy Ultimate reach full cure in 24 hours. However, the initial set happens much sooner — Gorilla Epoxy (Clear) sets in 5 minutes and Gorilla Epoxy Ultimate sets in 10 minutes. After joining the surfaces, leave the repair undisturbed for at least 30 minutes before any handling or light use, and wait the full 24 hours before subjecting the bond to significant stress or weight.

While Gorilla Epoxy sets in as little as 5 to 10 minutes depending on the product, a full cure typically takes 24 hours. For best results, follow the specific product instructions and allow adequate time for the epoxy to harden completely before handling.

Yes, clamping is recommended while the epoxy sets. After applying the mixed epoxy and joining your surfaces, clamp the pieces firmly together and leave the repair undisturbed for at least 30 minutes. This ensures consistent pressure across the bond during the initial set period and helps achieve maximum strength.

Yes. Gorilla Epoxy bonds well to glass and is a reliable option for repairing broken vases, figurines, eyeglass frames, and decorative glassware. Gorilla Epoxy Clear is the preferred choice for glass repairs since it cures transparent, keeping the repair as invisible as possible. Lightly clean the surfaces, mix a small amount of epoxy, apply sparingly to one side, and hold the pieces together until the initial set is complete.

Yes, and for this application Gorilla Epoxy Ultimate is the right choice. Its fully waterproof formula and 4,250 PSI bond strength make it well-suited for repairing metal patio furniture, wooden benches, stone planters, ceramic garden ornaments, and similar outdoor items that face UV exposure, rain, and temperature swings. Always clean and dry surfaces thoroughly before applying, and allow a full 24-hour cure before returning the item to outdoor use.

Yes. Both Gorilla Epoxy formulas bond strongly to metal surfaces including steel, aluminum, and brass. This makes epoxy a solid choice for repairing metal brackets, handles, tools, and hardware. For best results on smooth or coated metal, lightly sand the bonding area first to give the epoxy a surface to grip, then clean away any dust or oil before mixing and applying.

Yes, with care. Gorilla Epoxy Clear is the better option for jewelry and decorative items because it cures transparent, keeping the repair discreet. Mix only a very small amount — epoxy's working time is limited and the mixture thickens quickly — and apply with a toothpick or fine tool for precision on small pieces. Because epoxy creates a rigid, permanent bond, it works best on hard materials like metal pendants, ceramic beads, stone settings, and glass components rather than flexible or soft materials.