Starbond Knot-Filler System for Wood

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Price: $47.49$37.99


Starbond's Knot-Filler System is designed for woodworkers, like you, to save 100 times the time, allowing you to fill knots and cracks in wood in as fast as 30 seconds.


High-performance industrial-grade adhesive, Black Medium-Thick CA bonds parts with an emphasis on impact and shock absorbance. Brown Medium-Thick CA dries a natural-looking dark coffee brown, similar to Starbond Black CA glues, for knot and void filling.


Includes 4 applicator caps, 2 clog-free stoppers, and 16 micro-tips for precision.


Viscosity: 500 cPs (meaning the thickness of the liquid is similar to that of syrup). Penetrating abilities of up to 0.008" in size. Bonding time: 40-60 seconds.


When well kept, our product can last several years in a cold environment. Just make sure to store the bottle under 40°F before AND after use to QUALIFY FOR OUR 20 month shelf life warranty. If product does not last, we will replace that bottle free of charge.


When superglues dry too fast, you'll end up with whitening or 'hazing' of the bonding surface. Our specially formulated CA accelerator is designed to dry slightly slower than other accelerators on the market to prevent this effect.

  • Shipped today? Order within: May 24, 2024 05:00:00 -0700
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Same day shipping for orders placed before 3PM PST, and US customers get free shipping for all orders above $50. Shipping takes 2-5 business days.

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If you are not 100% satisfied with your purchase for any reason, just go through our easy return process by calling us, or e-mail us at You have 14 business days to return an item from the date you received it. However, for extended returns, call us at 1-800-900-GLUE for assistance. To be eligible for a return, your item may be used or unused but must be in the original packaging.


Knot-Filler System Includes:

2 oz. Black Medium-Thick CA Glue:

Starbond Black Medium-Thick CA glue is a flexible, rubber-toughened super glue that dries jet black in color. This is ideal for hiding imperfections, filling dark voids, and accenting specific areas in your projects. Along with impact and shock absorbing properties, the black CA retains favorable qualities such as the ability to be sanded down and polished to a high gloss finish. Additionally, when infiltrating fractures, pores, and soft material, the adhesive is able to expand and contract with its surrounding malleable environment, preventing cracking. Starbond Black Medium-Thick CA glue is commonly used in reconing speakers, hobby RC car tires, woodturning inlays, burl, and spalted wood. heavy duty bonding, and filling voids.

It is important to keep in mind that the colored CA glues have an extended bonding time due to the added rubber compound. Although bonding time is generally 40-60 seconds, it can take much longer to dry when larger volumes of the colored adhesive are applied. For these instances, use of Starbond Accelerator is highly recommended.

Used In:

  • Repairing and filling cracks, inclusions, voids, and knots in wood
  • Accenting designs on spalted wood
  • Bonding dissimilar materials such as wood, metal, glass and rubber
  • Creating a black accent on projects
  • Gluing R/C Car tires
  • Threadlocking in R/C cars
  • In speaker manufacturing, bonding top plate to frame, spider to voice coil, spider assembly to frame, spider to cone assembly, dustcap to cone, gasket to surround, surround to frame or cone, cone to coil connections, dressing lead wires to cone, and select dustcap applications.

2 oz. Brown Medium-Thick CA Glue:

Starbond Brown Medium-Thick CA Glue is for general-purpose use and so much more!  With its “coffee brown” color, there is no need to introduce sawdust and coloring agents to your other CA glues when filling voids! Our BR-500 super glue is the ideal adhesive for bonding close-fitting parts, filling bug holes and knots, and concealing imperfections in wood. We also recommend pairing this glue to highlight and contrast light-colored woods, for perfect inlays, crack repairs, and sanding to a high-polish finish. 

Used In:

  • Conceal minor imperfections in darker wood such as walnut.
  • Fill cracks, inclusions, voids, and knots in wood
  • Glue and repair in general applications

6 oz. Starbond Super Glue Accelerator:

Starbond Super Glue Accelerator, also known as CA glue "activator," is used to significantly increase the drying time of cyanoacrylate super glues. The CA glue accelerant is a solvent based product that can be applied before and/or after CA glue application. Starbond Super Glue Accelerator is commonly paired with thicker viscosity CA glues and black CA glue, as these adhesives take longer to dry. In addition, Starbond Super Glue Accelerator is useful when priming uneven surfaces or material combinations that are harder to bond, and in colder, drier environments where curing time may be delayed. 

When superglues dry too fast, you'll end up with whitening or "hazing" of the bonding surface. Our specially formulated CA accelerator is made to dry slightly slower than other accelerators on the market to prevent this effect.

WARNING This product can expose you to chemicals including N,N-Dimethyl-p-Toluidine, which is known to the State of California to cause cancer. For more information go to

  • Used to cure the CA that flows from joints that are being pressed together, greatly enhancing the joints strength
  • When using higher volumes of CA during gap filling applications, bonding time may take much longer, so Accelerator is highly recommended

Both Glues and Accelerator is Compatible With:

  • Wood
  • Metal
  • Rubber
  • Leather
  • Ceramics
  • Gemstones
  • Rocks & Minerals
  • Carbon Fiber
  • Fiberglass
  • Most Plastics


    • Viscosity: 500 cPs
    • Drying Time (With Accelerator): 15 - 20 sec
    • Drying Time (Without Accelerator): 1 - 3 min
    • :

    Customer Reviews

    Based on 33 reviews
    August S.I.
    Pretty Impressed

    I'm pretty impressed with the glues and accelerator spray. The speed and strength you get from it was a bit nerve racking to test, but putting a bunch of wood together and then turning into a bowl on the lathe 30 minutes later blew my mind. Great stuff.

    Gayle M.
    Raised project to next level

    The Starbond family of products have raised my projects to the next level. I can offer a more rustic look customers sometime want with the stabilizing properties of the thick and medium thick CA glues. Adds a dimension never available before. I build nothing no without them!!!!

    Michael N.

    Some of the best stuff I've worked with. Game changer.

    Coltin M.
    Great product

    Great product with fast shipping. With very organized net packaging. Great easy to understand instructions for using and storing the product. Like that they have different options for color and thickness.

    Cory B.
    Great product!

    Does exactly what is says! Awesome for filling cracks and knots. I really like the black ca glue on knots and if you want to have a contrast in color on the wood you are working with. Will buy again!

    Jack W.
    Great quick filler

    First time user-sold on the product!


    It worked well, but what ran out before I sprayed it with the accelerator is hard to remove.

    Adam H.
    Medium-Thick Color pack

    Worked great. Accelerator is no joke. Very happy. Already ordered some of the clears for another project. Will definitely be ordering more!

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