Skip to content

Free U.S. shipping on orders $65+

Regular price $37.99
Regular price $47.49 Sale price $37.99
Product Description

The Starbond Knot Filler System is the professional’s all-in-one solution for filling knots, cracks, voids, and defects in hardwoods. Designed specifically for woodworkers and woodturners, this system combines two of Starbond’s best-performing medium-thick CA glues (500 cPs)—Black Medium-Thick and Dark Brown Medium-Thick—with the Starbond 6 oz Aerosol Accelerator for instant, flawless curing.

The included Black Medium-Thick CA Glue is rubber-toughened and engineered for structural reinforcement, making it ideal for filling deep cracks, stabilizing knots, and blending seamlessly into dark woods such as walnut, wenge, ebony, and dark epoxy accents.

The Dark Brown Medium-Thick CA Glue cures into a rich coffee-brown tone that blends naturally into walnut and other medium-to-dark hardwoods. It’s perfect for cosmetic blending, warm-toned crack repair, and creating fills that look intentional and natural.

Both adhesives feature a 500 cPs medium-thick viscosity, providing clean, predictable flow suitable for void filling while preventing excessive runoff. When paired with the included acetone-based Starbond Accelerator, fills cure instantly—creating sand-ready surfaces with zero sinking, minimal blooming, and excellent leveling. Accelerator is highly recommended (almost mandatory) for knot stabilization, deep void work, and turning applications, where immediate structure is required.

Woodworkers use this system for live-edge slab repair, turning blank stabilization, furniture restoration, table cracks, guitar body repairs, and structural reinforcement. The combination of fast-curing CA and color-matched pigments delivers fills that are durable, clean, and visually cohesive with the surrounding grain.

Whether you’re a furniture maker, turner, luthier, or restoration professional, the Starbond Knot Filler System gives you everything you need for fast, durable, color-consistent filling—without the waiting, mess, or inconsistency of traditional fillers or slow-curing adhesives.

  • 5 stars: 265 (83%)
  • 4 stars: 22 (7%)
  • 3 stars: 7 (2%)
  • 2 stars: 3 (1%)
  • 1 star: 24 (7%)
J
James B. (Roscommon, US)
Great product

I got a walnut plank and making a sofa table. Two knots had holes so filled them with black starbond. Had some pit holes on the edges so put the dark brown on those. Works nice and the accelerator makes it drie is seconds.

R
Ross S. (Tucson, US)
CA glue knot filler system

CA glue with the accelerator work great! Filled all the knots and cracks, made them look good! Highly recommended will keep using it.

A
Aaron (Albuquerque, US)
Starbond is the best!

Best product on the market for small fixes on wood slabs etc, I use the clear for every day repairs with the accelerator. Frequent customer!

P
Paul B. (Traverse City, US)
No regrets very satisfied

My first experience ever with CA products and I’m totally pleased with the results.

R
Ruben (Denver, US)
knot filler combo

Great knot filler combo will definitely reorder

K
Kevin W. (Charlotte, US)
Must have product!!

Great and easy to use.. speeded my process up saving me a day

L
Lloyd M. (Memphis, US)
Brown and black epoxy pillars

Please fast drying epoxy pillows are great for knots and for hairline cracks I do a lot of custom Woodworking and these products are outstanding for my needs

E
Edward Y. (Mount Holly, US)

Much better than expected actually made my last project beautiful thank you

D
David S. (Atlanta, US)
Great quick filler for cracks and holes

Great filler for smaller cracks and holes, cures quickly with the accelerator. I was able to use an entire bottle of the dark brown as the shelf life of the product is outstanding

B
Bill G. (Clinton Township, US)
Works great

Filled in my knots perfectly. I really like the color matching.

U
Ulrich B. (Denver, US)
Absolutely perfect product

Used the brown CA glue on a juniper wood sculpture to fill voids and it worked out so much better than I had hoped. Perfect!!!

C
Christopher M. (St Louis, US)
Great stuff!

I started using your product last month. We have a home business (wife does candles & I turn the wooden stands) and use local storm fallen timber with all the burls, cracks, & character that you can’t find at a lumber yard.

So far I’ve tried epoxy, wood glue & your product with good success; however your product is MUCH faster setting & saves me lots of time stabilizing the wood. So far so good & if I had to complain about anything it would be this: your spray accelerant needs a better precision delivery system as it wastes the spray IMHO. Maybe a red straw attachment?

V/R

MSgt Chris Mathis
USAF Retired

R
Ronald W. (Jackson, US)
Great product

The knot fill product is wonderful. No more dyeing regular CA. A time saving and useful benefit!

J
John L. (Valley, US)
Great stuff

Seen all the ads finally purchased the two color kit and wow, does a great job.

B
Bill L. (Redmond, US)
Great products!

Great products and fast delivery! Absolutely nothing to complain about! Love these guys.

G
George L. (Anchorage, US)
Everything as promised

This is my first time using starbond. It came promptly to my mailbox and after reviewing instructions I found the glue easy to use and everything worked as expected . I’ve used the medium thickness and will be using the gap filler , brown and black to strengthen the plywood as I form patterns for the tambour doors.

J
Joe T. (Tulsa, US)
Great

I have a small furniture repair company and use super glue all the time. I love Starbond glue. It works great and I've never looked at it and wondered if it was too old to work. The company is also one of the really good companies to deal with. They hay always gone over and above to take care of my needs