GluBoost Fill n' Finish


A flexible filler, finish, ding repair solution, and more!

GluBoost Fill n' Finish, Original
Original Item # 103303 In stock, ready to ship!
GluBoost Fill n' Finish, Thin
Thin Item # 103304 In stock, ready to ship!
GluBoost Fill n' Finish, UltraThin
UltraThin Item # 103387 In stock, ready to ship!
GluBoost Fill n' Finish, Original, Black
Original, Black Item # 103462 In stock, ready to ship!
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GluBoost Fill n' Finish

A flexible filler, finish, ding repair solution, and more!
All Fill n' Finish formulas are truly game changers for all your builds, repairs, top coating, inlay work, marquetry, and more. Use fewer coats and get superior results with these innovative self-leveling formulas. It's super fast, easy to use, and saves both time and money. 

Fill n' Finish Original and Fill n' Finish Thin are ideal for drop fill and finish work. They fill pores, gaps, and cracks, as well as dings and dents. It's compatible with any type of wood finish. You can shoot lacquer right over Fill n' Finish with completely invisible results.

Choose the right formula for your job:

Fill 'n Finish Original is a flexible, water clear wood finish, pore filler, and repair product that’s both fast and easy to use. Super long open time with zero to minimal witness lines. 

Fill n' Finish Thin is a non-creeping, water clear, non-brittle, and flexible pro formula top coat, finish, and repair solution. Use it as a base coat during drop fills and as a top coat after Fill n Finish Original. It's perfect for less porous woods, like ebony, maple, some rosewoods and Koa, which require a thinner finishing product that will penetrate further. Also perfect as a top coat when using both Fill n Finish products as a complete finish.

Fill n' Finish UltraThin is a flexible top coating, filling scratches and repairing all types of finish cracks. Great for binding repairs, inlays, nut slot repairs, and for blending finishes. UltraThin can be used for small brush work, wick-ins, and on any areas where a brittle, thin glue would fail. It's also a superior sealer and top coat for stains and other work materials and finishes. Phenomenal for stabilizing spalted wood, potting, sealing end tubes and seeping into cracks like never beforeseals end grain beautifully!

Fill 'n Finish Original Black is perfect for black peghead and ebony bridge and fingerboard repairs. Fill n' Finish Black is deliberately semi-transparent for ultimate flexibility. Add MasterTint Black for more density of color.


  • Superior results with fewer coats
  • Dries water clear and flexible without creeping
  • Super long open time
  • Safe for use on all finishes: nitro, lacquer, poly, urethane, and even water-based finishes
  • 100% pure product for superior and stronger results
  • Super freshlongest shelf life available anywhere
  • Pin in tip cap to prevent clogging

For even more control get GluBoost Whip Tips. They give you pinpoint accuracy for drop-fills and more.

GluBoost Fill n' Finish products are very slow drying products. GluBoost GluDry Non-blushing Accelerator must be used along with ALL Fill n' Finish products. Shake well before use. 

2-oz. bottle.

California Proposition 65 Warning
Cancer and Reproductive Harm