# Best Epoxy for Scale Models: Strong Two-Part Adhesives for Heavy Parts Source: https://modelbuildlab.com/best/best-epoxy-for-models Updated: 2026-10-06 Publisher: Model Build Lab. Our score is an editorial rating out of 10 (fit 35%, features 25%, build 20%, value 20%), not a customer rating. Method: https://modelbuildlab.com/how-we-research#our-score Some joints ask more than CA or plastic cement can give. A white-metal landing gear leg under a heavy resin kit, a large diorama assembly, or a load-bearing pin joint needs an adhesive with genuine structural strength, and that is where two-part epoxy earns its place. Mixed from resin and hardener, epoxy cures into a hard, slightly flexible bond that fills gaps, tolerates stress, and grips metal, resin, wood, and plastic alike. The main choice is working time: 5-minute formulas set before parts can sag, while 30-minute versions allow careful alignment and cure stronger. This guide compares hobby-relevant epoxies by strength, clarity, mixing ease, and cure time, so heavy parts stay exactly where you put them. ## Picks ### 1. Bob Smith Industries BSI-201 Quik-Cure Epoxy - 4.5 oz. Combined, Clear - 5-Minute Fast-Setting Adhesive for Wood, Metal, Glass, Crafts & Repairs Our score: 8.4/10 (Fit for the job 9/10 · Features and specs 8/10 · Build and materials 8/10 · Value 8/10) Bob Smith Industries BSI-201 Quik-Cure Epoxy, 4.5 oz. combined, a clear 5-Minute fast-setting adhesive for many materials. Pros: - 5-Minute set lets you work quickly on repairs and assemblies - Clear cure hides joints on resin, metal and plastic - Hobby-trusted brand with a generous 4.5 oz. supply Cons: - Short working time makes large assemblies rushed - Mixing two parts adds prep time compared with CA Details: https://modelbuildlab.com/product/B0166FFFD4 ### 2. Devcon Epoxy, 2 Ton Epoxy, 4-1/2 Ounce Bottles, 2 Bottles Our score: 8.2/10 (Fit for the job 8/10 · Features and specs 8/10 · Build and materials 8/10 · Value 9/10) Devcon 2 Ton Epoxy in two 4-1/2 Ounce bottles, a strong, slower setting epoxy for durable structural bonds. Pros: - 2 Ton rating signals very strong structural bonds - Separate bottles let you mix just what you need - Large supply is great for wooden ships and dioramas Cons: - Bottles need careful measuring for correct ratios - Long cure time delays sanding and handling Details: https://modelbuildlab.com/product/B005K091ZU ### 3. Bob Smith Industries BSI-205 Slow-Cure™ Epoxy - 4.5 oz. Combined, Clear - 30-Minute Working Time Adhesive for Wood, Fiberglass, Metal, Crafts & Structural Repairs Our score: 8.0/10 (Fit for the job 8/10 · Features and specs 8/10 · Build and materials 8/10 · Value 8/10) Bob Smith Industries Slow-Cure two-part epoxy, 4.5 oz combined, with a 30-minute working time. Suits model joints that need careful alignment, such as wings, large hull halves and reinforced structural bonds. Pros: - 30-minute working window leaves time to position, align and clamp large assemblies - Thicker gap-filling formula bonds wood, fiberglass, metal, glass, ceramics and most plastics - Described as forming a tough, impact-resistant bond once fully cured, for high-stress joints Cons: - 4.5 oz combined is half the size of the 9 oz slow-cure set this pick replaces - A 30-minute epoxy is slow for small parts, where a 5-minute formula is more practical Details: https://modelbuildlab.com/product/B0166FFFS4 ### 4. Gorilla 2 Part Epoxy, Clear Epoxy, 0.85 Ounce Syringe - 5 Minute Set, Incredibly Strong Bonding Our score: 7.8/10 (Fit for the job 8/10 · Features and specs 7/10 · Build and materials 8/10 · Value 8/10) Gorilla 2 Part Epoxy, clear, in a 0.85 Ounce syringe with a 5 Minute set for strong bonding on hobby repairs. Pros: - Syringe dispenses both parts evenly for consistent mixes - Clear finish hides bonds on display pieces - Gorilla brand is widely available in hardware stores Cons: - 0.85 Ounce syringe runs out quickly on bigger jobs - Mixed epoxy thickness is hard to apply to tiny parts Details: https://modelbuildlab.com/product/B001Z3C3AG ### 5. J-B Weld 50112 ClearWeld 5 Minute Set Epoxy Syringe - Clear - 25 ml, 25ml Our score: 7.8/10 (Fit for the job 8/10 · Features and specs 7/10 · Build and materials 8/10 · Value 8/10) J-B Weld ClearWeld 50112, a clear two-part epoxy in a 25 ml syringe that sets in 5 minutes and cures in 1 hour. A small, quick epoxy for model repairs and mixed-material joints where a clear bond line matters. Pros: - Syringe dispenses both parts at a 1:1 ratio, with a mixing tray and stir stick included - Sets in 5 minutes and cures in 1 hour to a clear finish, with a stated 3900 PSI tensile strength - Listed for metal, most plastics, PVC, wood, ceramic, fiberglass and glass Cons: - 25 ml syringe is a small quantity, suited to repairs rather than large structural jobs - A 5-minute set leaves little time to adjust complex or multi-part assemblies Details: https://modelbuildlab.com/product/B009EU5ZM0 ### 6. Loctite Epoxy Instant Mix 5 Minute, 0.47 fl. oz. Syringe (Pack of 2) Our score: 7.8/10 (Fit for the job 8/10 · Features and specs 8/10 · Build and materials 7/10 · Value 8/10) Loctite Epoxy Instant Mix 5 Minute, 0.47 fl. oz. syringe, Pack of 2, with a mixing nozzle for easy dispensing. Pros: - Mixing nozzle blends the two parts automatically - Pack of 2 keeps a spare syringe for later repairs - 5 Minute set is quick for small hobby fixes Cons: - Mixing nozzle wastes some epoxy with each use - Small syringes are not economical for big projects Details: https://modelbuildlab.com/product/B00S88LYQK ### 7. J-B Weld 8265S Original Cold-Weld Steel Reinforced Epoxy - 2 oz. Our score: 7.8/10 (Fit for the job 7/10 · Features and specs 8/10 · Build and materials 8/10 · Value 9/10) J-B Weld Original 8265S, a steel reinforced two-part epoxy in 2 oz of tubes that mixes 1:1 and cures dark grey. A heavy-duty option for metal parts, weights and load-bearing joints on larger models. Pros: - Steel reinforced with a stated tensile strength of 5020 PSI and heat resistance to 550 F - Once cured it can be tapped, filled, sanded and drilled, which helps when shaping a repair - Listed for metal, plastic and PVC, wood, ceramic and fiberglass surfaces Cons: - Slow: 4 to 6 hours to set and 15 to 24 hours to cure, so parts must stay clamped or supported - Cures dark grey, so it is unsuitable for clear parts or any joint that stays visible Details: https://modelbuildlab.com/product/B0006O1ICE As an Amazon Associate I earn from qualifying purchases.