Starbond Knot Filler System
Fill. Spray. Sand.
- ✓ Small cracks: sand in 20–30 seconds
- ✓ Deep fills: build thin layers
- ✓ No measuring, mixing, or tinting
Starbond Knot Filler System
30-day satisfaction guarantee • Free Shipping on orders over $75!
Fill knots fast.Sand sooner.
Fill wood knots, cracks, and voids with pre-colored glue and accelerator—no mixing or overnight wait.
Get the complete system — $37.99 →
✓30-day satisfaction guaranteeTry it on a real project with confidence.
Fast wood repair vs. two-part epoxy
Fill wood faster.
Small cracks and knots can be sand-ready in as little as 20 seconds. Two-part epoxy can take hours—or overnight—before sanding.
Two-part epoxy filler
Measure. Mix. Wait.
- Mix resin and hardener
- Add pigment if needed
- Wait hours—or overnight—to sand
Inside the Knot Filler System
Three essentials. Faster wood repairs.
Black Knot Filler
Bold contrast for wood cracks and knots.
Brown Knot Filler
Blends with walnut and dark woods.
Accelerator Spray
Hardens each thin layer fast.
Included pro technique guide
Knot FillerSuccess Guide
A large-type, two-page guide for cleaner fills and better sanding results.
✓Use thin layersSpray accelerator after every layer.
✓Warm means waitLet the repair cool before sanding.
✓Keep it at the benchOnly the instructions you need.
The complete Knot Filler System
Complete repair kit + pro technique guide
One kit. Two colors. Less downtime.
✓2 oz Black Medium-Thick CAFor bold contrast and reinforced fills
✓2 oz Dark Brown Medium-Thick CAFor walnut and dark hardwoods
✓6 oz Aerosol AcceleratorHardens each thin layer
✓Precision application toolsCaps, nozzles, stoppers, and micro-tips
✓Knot Filler Success GuideLarge-type two-page guide
$37.99$47.49Save $9.50
Get the complete system — $37.99 →
For oversized wood repairs
Add epoxy putty for large voids.
Choose the color for large knots, missing wood, and shaped repairs.
From verified customers
Real woodwork. Real results.
Rated 4.5/5 across 236 customer reviews.
★★★★★“What a time saver. I was final sanding in five minutes.”
★★★★★“Easy to use, worked great to fill cracks, and sanded easily.”
Know before you fill
Three quick answers.
Need help? Call Starbond at 1-800-900-GLUE, Monday–Friday, 9 a.m.–5 p.m. Pacific.
How quickly can I sand the repair?
For small bugholes and shallow cracks, spray accelerator and sand in as little as 20–30 seconds. For deeper knots and voids built in multiple thin layers, wait 10–30 minutes after the final layer. If the repair feels warm, let it cool completely.
What size knots and voids can it handle?
Use the Knot Filler System for cracks, bugholes, knots, and deeper repairs built in thin layers. For very large knots, missing wood, or shaped repairs, choose Starbond Epoxy Putty.
Should I choose black or brown?
Dark brown blends with walnut and medium-to-dark hardwoods. Black creates a deliberate high-contrast repair.
$37.99Get the system →