# Best CA Glue for Scale Models: Super Glues for Resin, Metal, and PE Source: https://modelbuildlab.com/best/best-ca-glue-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 The moment a build includes resin, photo-etch, or 3D-printed parts, plastic cement stops working and cyanoacrylate takes over. CA bonds dissimilar materials in seconds, which is exactly what you want when tacking a tiny brass grab handle in place, and exactly what you do not want when a part sets crooked. Choosing well means matching viscosity to the job: thin CA wicks into tight joints, medium gives a few seconds of adjustment, and gel stays put on vertical surfaces and fills gaps. Cure speed, blooming on clear parts, and bottle-tip clogging separate the good bottles from the frustrating ones. This guide compares hobby-focused CA glues and explains which viscosity belongs at each stage of a build. ## Picks ### 1. Starbond Thick CA Glue with Activator Bundle (2 oz. + 6 oz.), Premium Cyanoacrylate Super Glue with Aerosol Accelerator Our score: 8.6/10 (Fit for the job 9/10 · Features and specs 9/10 · Build and materials 8/10 · Value 8/10) Starbond Thick CA Glue with Activator bundle (2 oz. + 6 oz.), a premium super glue kit with an aerosol accelerator. Pros: - Activator included, so thick CA cures on demand - Thick formula works well for gap filling and sculpting - Bundle saves buying glue and accelerator separately Cons: - Accelerator can cause white blooming on nearby surfaces - Thick CA is not suited to wicking into tight seams Details: https://modelbuildlab.com/product/B09DFCZ49R ### 2. Bob Smith Industries BSI-131H Insta-Cure Thin Super Glue, 1 oz. Our score: 8.3/10 (Fit for the job 9/10 · Features and specs 7/10 · Build and materials 8/10 · Value 9/10) Bob Smith Industries BSI-131H Insta-Cure Thin Super Glue 1 oz., a water-thin CA that wicks into tight joints. Pros: - Water-thin viscosity wicks into seams for fast bonds - Great for photo-etch and metal to plastic joints - Hobby-grade CA trusted by RC and scale modelers Cons: - Thin CA runs easily and can flood surface detail - Bonds skin instantly, so work carefully Details: https://modelbuildlab.com/product/B01FUFWN8Q ### 3. Bob Smith Industries Maxi-Cure Extra Thick, 2 oz., Blue (BSI-113) Our score: 8.0/10 (Fit for the job 8/10 · Features and specs 7/10 · Build and materials 8/10 · Value 9/10) Bob Smith Industries Maxi-Cure Extra Thick CA 2 oz. in blue, a gap-filling super glue with a longer working time. Pros: - Extra thick formula fills gaps while bonding - Longer set time allows parts to be repositioned - 2 oz. bottle offers good value for heavy users Cons: - Slow cure without an accelerator can hold up the build - Thick glue is harder to apply to tiny parts Details: https://modelbuildlab.com/product/B0000DD1QH ### 4. Mercury Adhesives M20FT Flex 2oz (Thin Flex CA) Our score: 8.0/10 (Fit for the job 8/10 · Features and specs 8/10 · Build and materials 8/10 · Value 8/10) Mercury Adhesives M20FT Flex 2oz Thin Flex CA, a thin super glue that stays slightly flexible after curing. Pros: - Flexible cure resists cracking under vibration or knocks - Thin viscosity wicks into close-fitting joints - Good for parts that may flex like antennas or aerials Cons: - Flex formula is less common, so refills may be harder to find - Thin glue can run onto detail if over-applied Details: https://modelbuildlab.com/product/B01K5XV6CW ### 5. Zap-O Foam-Safe Odorless CA Glue, 0.7oz Our score: 7.8/10 (Fit for the job 8/10 · Features and specs 8/10 · Build and materials 8/10 · Value 7/10) Zap-O Foam-Safe Odorless CA Glue 0.7oz, a CA formulated for foam and for users sensitive to super glue fumes. Pros: - Foam-safe formula will not melt foam parts - Odorless type reduces eye and nose irritation - Less likely to fog clear canopies than standard CA Cons: - Slower cure than regular CA glues - Small 0.7oz bottle runs out quickly Details: https://modelbuildlab.com/product/B094DW81Y7 ### 6. Insta-cure gap filling 2oz Bob Smith Ind. Our score: 7.3/10 (Fit for the job 8/10 · Features and specs 5/10 · Build and materials 8/10 · Value 8/10) 2 oz bottle of Bob Smith Industries Insta-Cure gap filling CA glue. A gap filling super glue for model joints that do not close perfectly flush, in a size that suits regular builders. Pros: - Gap filling formula by name, for joints with small voids where thin CA would run straight through - 2 oz bottle, twice the size of the 1 oz hobby bottles, for builders who use CA regularly - From Bob Smith Industries, the same maker as the Insta-Cure and Maxi-Cure glues in this guide Cons: - The listing gives almost no detail: no set time, viscosity or shelf life is stated - 2 oz is a lot of CA for an occasional builder, and no applicator tips are mentioned Details: https://modelbuildlab.com/product/B0000DD1QQ ### 7. Gorilla Super Glue Gel, Clear Glue, 20 Gram, All Purpose and Fast Setting Our score: 7.2/10 (Fit for the job 7/10 · Features and specs 7/10 · Build and materials 7/10 · Value 8/10) Gorilla Super Glue Gel in clear, 20 Gram, a no-run gel CA for all purpose and fast setting repairs. Pros: - Gel formula does not run on vertical surfaces - Widely available in hardware and big box stores - Good for bonding metal, resin and plastic parts Cons: - Nozzle is less precise than hobby CA applicators - General purpose glue lacks thin options for wicking Details: https://modelbuildlab.com/product/B00OAAUAX8 As an Amazon Associate I earn from qualifying purchases.