STARBOND Black Medium-Thick CA Glue Pro Kit (2 oz) – Rubber-Toughened, Impact-Resistant Cyanoacrylate Super Glue – for Durable Knot Filling, Crack Repair, Woodworking, Guitar, Hobby & RC Projects

Works great for filling knots. I use the darker one with dark walnut and it does well. Color is very dark. Dries instantly with activator, but stays liquidy while you work with it. For surface level cracks and holes, you can just apply and sprayed. For deeper cracks and holes, you need to apply thin layers and spray in between. The activator won't reach lower in the hole and this can create cavities and soft spots until the glue dries. As the glue dries, either with activator or naturally, it will compress and shrink, creating gaps and holes, so you will need to adjust how you use it. Once properly dried, it is shiny and very hard. I use it for finished surfaces. It's a great product and the price isn't terrible.

The Starbond 2 oz. "Dark Brown" Medium-Thick CA Glue is a specialized adhesive designed for woodworking, woodturning, carpentry, and various hobby applications such as guitar building and RC models. Here’s a detailed review based on its features and performance: **Viscosity and Application:** This CA (Cyanoacrylate) glue features a medium-thick viscosity with 500 CPS (Centipoise), making it suitable for filling knots and voids in wood without running or dripping. The consistency allows for precise application and control, ensuring the glue stays where it’s applied for effective bonding. **Color and Finish:** The "Dark Brown" color of the glue blends seamlessly with wood surfaces, providing a natural appearance once cured. It effectively disguises imperfections like knots or gaps, enhancing the overall aesthetic of woodworking projects without the need for extensive sanding or staining. **Versatility and Compatibility:** Ideal for both indoor and outdoor woodworking projects, the Starbond CA glue bonds well with various wood types and materials commonly used in woodworking and hobbyist applications. It adheres to wood fibers effectively, creating strong and durable bonds that withstand stress and vibrations. **Strength and Durability:** Once cured, the CA glue forms a strong and durable bond that is resistant to moisture, heat, and most chemicals. It enhances the structural integrity of wood joints and fills voids effectively, contributing to the longevity and durability of woodworking projects. **Ease of Use:** The glue comes in a convenient 2 oz. bottle with a precision applicator tip, facilitating easy and controlled dispensing. It sets quickly when exposed to the air, allowing for fast assembly and minimal clamping time compared to traditional wood glues. **Safety Considerations:** As with all CA glues, proper ventilation and skin protection are recommended during use to avoid irritation. It’s important to follow manufacturer guidelines for storage and handling to maintain the quality and effectiveness of the glue. **Value for Money:** Considering its specialized application in woodworking and hobbyist projects, the Starbond CA glue offers good value for money. The 2 oz. size provides sufficient quantity for multiple projects, ensuring long-term usability and cost-effectiveness. **Conclusion:** In conclusion, the Starbond 2 oz. "Dark Brown" Medium-Thick CA Glue is an excellent choice for woodworkers, hobbyists, and craftsmen looking for a reliable adhesive solution for filling knots, cracks, and gaps in wood. With its precise viscosity, color matching, and strong bonding properties, this CA glue enhances the quality and aesthetics of woodworking projects while offering durability and ease of use.

This is a good product. Used it to fill nail holes in a piece of trim I put on a shelf I made. Worked exactly as expected. The thin long applicator tip made it easy to get the CA glue in the holes. It is very dark brown in the hole so I don't think this one color would work on all applications. If using for various projects, it would be best to have both the dark and medium browns. Not sure how easy mixing the colors would be, but that would probably give you a little broader color range.

I’ve been using this Starbond black medium thick CA glue for filling little voids and hairline cracks in my black-dyed plywood projects, and honestly it’s kind of a cheat code. I’ll sand the surface, drip this stuff into the tiny gaps, hit it with activator, then sand flush again – the black glue just disappears into the grain and makes everything look way more “pro” than it probaby deserves. Viscosity is right in that sweet spot for this: thick enough that it doesn’t run all over the place, but still thin enough to wick into fine cracks and ply edges. The black color is the magic here – with clear CA you always see that weird shiny line in certain lighting, but this blends in with ebony stain, matte black paint, and even charred/shou sugi ban edges really nicely. It’s not perfect though. The fumes are no joke, especially if you’re using accelerator, so definitely don’t hover over it like I keep forgetting not to do. It also cures very hard and a bit brittle, so I wouldn’t use it as the main structural glue on anything that flexes alot – I still rely on wood glue or epoxy for that and treat this more as a cosmetic and spot-repair fix. The tip can clog if you’re not diligent, but that’s pretty standard CA behavior; I just keep a pin nearby and try not to gorilla-squeeze the bottle. Overall, if you do black furniture, speaker boxes, cosplay props, 3D prints you paint black, or any kind of dark-themed builds, this is one of those “why didn’t I buy this sooner” products. It saves projects that would otherwise look janky up close and makes your finish work look way more intentional for very little effort.

I’ve tested dozens of adhesives for restoration, resale prep, and vintage repair — and STARBOND Black Medium-Thick is a category disruptor. The viscosity hits that sweet spot: thick enough for gap-filling, thin enough for precision micro-applications. The included microtips are workflow gold — no clogging, no waste, just clean lines and fast bonding. Used this on a vintage pedestal table with veneer separation and it bonded like a pro-grade epoxy, minus the mess. The tint blends seamlessly into dark woods and composite finishes — ideal for furniture flips, collectible touch-ups, and high-impact resale prep. Packaging sealed, labeled, and ready for repeat use. This is a hidden gem for anyone in the restoration or resale game. STARBOND isn’t just glue — it’s a toolbox essential for creators, flippers, and DIY pros who need fast-set, high-hold, no-drip performance.

I have been using this Dark Brown medium-thick Starbond CA for about 3 months now, and I am very impressed. It has been excellent for sealing cracks in black walnut, and covering the occasional mistake I’ve made. Most recently, I used the included precision-applicator tips to darken the groves cut with a CNC router for my corporate initials. This has really impressed me, and it is very affordable. I’d like to have several colors of this on-hand, but dark brown is an excellent choice for just having one color! CA is not very useful when the bottle hardens up, and I credit Starbond for having well-designed nozzles and caps to keep it from solidifying. I did not get the accelerant, and it seems to take more than a half-day to dry when I use it to fill cracks or grooves.

The adhesive on this is very strong, so make sure to wear gloves and work in a well-ventilated area due to the smell. The black color gives a nice shine and blends well with wood panels, and it even works on plastic. It’s easy to apply and creates a solid hold, making it great for repairs or projects where a durable bond is needed. Very satisfied with how well it performs. Comes with extra tips and a rep cap for storage. It dries fast and good thickness.

I use this glue for just about everything and it has yet to disappoint me! Repaired crack on John Deere X530 hood. This has held up for an entire season of mowing. Crack was in the middle of the top. Stress point every time you open hood and I open before every use to check oil. Used to fill chip in guitar finish. Used to glue broken hinge on reading glasses. Will no longer fold shut but works well for spare set on desk. Latest use was a repair to a lawnmower tire sidewall gouge that had no penetration to inside yet was slow leak. Yet to determine longevity of this repair. I used the Starbond aerosol activator on all these repairs. The best part is I've had this 2 oz. bottle for nearly FIVE years! Secret is to seal bottle tightly and keep in freezer door (glue only not activator). Will upload photos later. Note: It only takes a quick spray of activator!

Very expensive product - arrived early but not great value

Only used a couple of times but I'm happy with the results so far, used on live edge oak slabs, sanded well when set and hasn't, as yet, stained the area around what's been filled.

Awesome super glue perfect for using on exposed repairs on wood turning projects, a little on the expensive side with no real alternatives, use it with an accelerator for fast curing time 😀

Ça colle fort et c’est marron. C’est nickel. Rares sont les produits qui sont aussi simples et celui-là remplit toutes les demandes.

I really liked the short fine tips supplied. used to fill blemishes and highlight in an an Iron bark burl in a wood turned bowl. Thank you