Starbond Black Medium CA is the black CA glue engineered for professional dark wood repairs. At 150 cPs with a jet black pigment, it fills cracks, knots, and voids in walnut, wenge, ebony, rosewood, and blackwood with a color that blends into the surrounding grain — rather than announcing itself as a fill.
Most woodworkers reaching for black epoxy for wood repairs are solving an aesthetic problem: standard clear or brown adhesives create visible fill lines on dark hardwoods. The instinct to use black epoxy is correct — the color needs to match. But black epoxy requires mixing two components, managing a longer open time, and waiting hours for cure. Starbond’s black super glue solves the same problem in seconds: no mixing, no measuring, instant activation with accelerator, and the same jet black finish that disappears into dark grain.
The complete Pro Kit includes precision microtips for controlled deposit into fine cracks, extra nozzles, a clog-prevention pin cap, and QR access to Starbond’s Masterclass Library — including tutorials specifically for dark-toned color-matching and crack repair on walnut, wenge, and ebony.
Black CA Glue for Walnut, Wenge, Ebony, Rosewood & Dark Hardwoods
Every dark hardwood species has its own tone, grain pattern, and natural defect character. What they share is a common problem: standard adhesives create repairs that are impossible to hide. Clear CA cures light. Brown CA cures warm-toned. Neither matches the deep, cool black of wenge grain or the near-black heartwood of ebony. Starbond black CA glue was formulated to cure jet black — giving dark wood repairs a finish that reads as part of the wood rather than a patch on top of it.
Dark hardwood species and applications:
- • Walnut — filling natural cracks, checks, and sapwood voids in slabs and tabletops
- • Wenge — sealing end-grain pores and deep surface checks before finishing
- • Ebony — stabilizing micro-cracks without disrupting the near-black surface tone
- • Rosewood — repairing seam separations and grain tear-out on instrument bodies
- • Blackwood — filling turned voids and end-grain defects before sanding
- • Bog Oak and reclaimed dark timbers — filling historic checks and splits cleanly
The 150 cPs medium viscosity is ideal for these applications: thick enough to bridge surface cracks without soaking in, controlled enough to deposit precisely into narrow voids without overflowing the surrounding wood. Use with Starbond accelerator for instant cure and instant stabilization of deeper knot fills.
Knot Filling & Crack Stabilization with Black CA Glue
Knot filling and crack stabilization are the two highest-value applications for any black superglue in a woodworking shop. Both require an adhesive that flows into the void, cures without sinking, holds structural integrity against the wood surface, and disappears visually into the surrounding tone. Starbond Black Medium CA delivers all four.
Crack Stabilization
For surface and through-checks in dark hardwood slabs, the medium-thick 150 cPs flow wicks partially into the crack while building up enough body to fill the visible void. The black cyanoacrylate glue cures color-matched to the surrounding wood, then sands flush for a seamless finish. Use accelerator to freeze the fill immediately and prevent sinking on vertical grain.
Knot Filling
Knot voids in dark species require a black epoxy for wood alternative that can be built up in layers. Apply starbond black CA glue in passes: flood the void, hit with accelerator to freeze the layer, repeat until flush. The result is a solid, sandable fill with a black tone that reads as a natural feature rather than a repair.
Knot and crack repair workflow:
- • Clean the void — remove loose fibers and debris with compressed air or a pick
- • Apply black CA glue into the crack or knot with a microtip, working from deepest point outward
- • Hit with Starbond Aerosol Accelerator to freeze the layer instantly
- • Build up additional layers as needed until slightly proud of the surface
- • Sand flush starting at 120 grit, progress through 220, 400, and finish to desired sheen
