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Best Wood Fillers for Repairing Large Holes and Structural Damage

You've put hours into your woodworking project only to be stopped dead by a massive, gaping hole that makes the whole piece look like a total disaster. It's incredibly frustrating when standard fillers shrink, crack, or simply crumble away, leaving you with a patchy mess that feels more like a temporary band-aid than a professional fix. You deserve a repair that doesn't just fill the void but bonds deep into the grain to create a rock-solid, sandable surface that's actually tougher than the original timber. We've rounded up the absolute best heavy-duty fillers to give your repairs that seamless, invisible finish you're after, including one or two secret options you probably wouldn't expect to find in a standard toolbox.

Best Wood Fillers for Repairing Large Holes and Structural Damage
Gorilla All Purpose Wood Filler, 6 Ounce Tub, Natural Finish

Gorilla All Purpose Wood Filler, 6 Ounce Tub, Natural Finish

  1. Dry Time: 15–30 minutes for small cracks.
  2. Shrink Resistance: Formulated to be shrink and crack resistant.
  3. Usage Environment: Suitable for both indoor and outdoor applications.
  4. Finishing Capabilities: Highly sandable and compatible with stains and paints.
  5. Best for: Filling large holes, gouges, and deep cracks in wood.

BONCART Flexible Crown Molding Trim

BONCART Flexible Crown Molding Trim

  1. Water-based Formula: Non-toxic, low-odor composition that is safe for indoor use and easy to clean up.
  2. Shrink and Crack Resistance: Engineered to remain stable and solid after curing without shrinking or developing surface cracks.
  3. Net Volume: 280g (9.8 oz) high-capacity bottle designed for extensive repair tasks.
  4. Surface Compatibility: Fully sandable, paintable, and stainable to ensure a seamless match with existing wood finishes.
  5. Best for: Filling large holes, deep cracks, and repairing structural defects in furniture, flooring, or cabinetry.

DAP Plastic Wood-X All-Purpose Wood Filler

DAP Plastic Wood-X All-Purpose Wood Filler

  1. DryDex Technology: Built-in color indicator goes on pink and dries natural when it is ready to sand.
  2. Structural Integrity: High-performance formula that is shrink and crack resistant for long-lasting repairs.
  3. Tooling Versatility: Can be sanded, planed, drilled, screwed, or nailed once fully cured.
  4. Application Environment: Water-based, low-odor formula suitable for both interior and exterior use.
  5. Best for: Best for heavy-duty repairs and filling large holes or deep gouges in wood.

DAP DryDex Wood Filler

DAP DryDex Wood Filler

  1. Dry Time Indicator Technology: Changes color from pink to natural to signal when it is ready to sand.
  2. Structural Integrity: High-performance formula that resists shrinking, cracking, and crumbling in deep cavities.
  3. Fastener Anchoring: Provides heavy-duty strength capable of securely holding nails and screws after curing.
  4. Finish Versatility: Professional-grade surface that is fully sandable, paintable, and stainable.
  5. Best for: Large holes and deep wood repairs requiring a visible indicator of dryness.

Premium Wood Filler Putty

Premium Wood Filler Putty

  1. Drying Time: Approximately 30 to 60 minutes depending on hole depth.
  2. Finish Compatibility: High-performance stainable and paintable formula.
  3. Physical Integrity: Engineered to be shrink and crack resistant.
  4. Application Environment: Suitable for both indoor and outdoor wood surfaces.
  5. Best for: Filling large holes, deep cracks, and structural defects in furniture.

MOLLOR Wood Filler Repair Kit

MOLLOR Wood Filler Repair Kit

  1. Formulation: Water-based, non-toxic, and eco-friendly resin.
  2. Net Weight: 280g (9.8 oz) high-capacity container for extensive repairs.
  3. Drying Performance: Fast-drying and shrink-resistant formula designed for deep fills.
  4. Finish Compatibility: Fully sandable, paintable, and stainable to match existing wood grain.
  5. Best for: Filling large holes, deep cracks, and structural defects in wooden furniture.

Goodfilla Water-Based Wood Grain Filler

Goodfilla Water-Based Wood Grain Filler

  1. Shelf Life: Infinite (reconstitutable with water if it dries out).
  2. Environmental Safety: Water-based, zero VOC, and non-toxic formula.
  3. Structural Integrity: Guaranteed not to shrink, crack, or sink even in deep applications.
  4. Finishing Compatibility: High absorption rate for all stains, tints, pigments, and topcoats.
  5. Best for: Best for filling large holes and deep knots in a single application.

Bondo All-Purpose White Plastic Filler

Bondo All-Purpose White Plastic Filler

  1. Mixing Ratio: 1:1 simple volume ratio.
  2. Shrinkage Rate: 0% (dimensionally stable).
  3. Workability: Can be sanded, carved, sawed, and nailed like real wood.
  4. Curing Time: Hardens in 1 to 2 hours.
  5. Best for: Structural restoration and rebuilding missing or rotted sections of wood.

6-Pack White Wood Filler Sticks

6-Pack White Wood Filler Sticks

  1. Product Quantity: 2-pack set of repair sticks.
  2. Curing Time: Instant results with no drying time required.
  3. Application Method: Direct-rub solid stick for mess-free filling.
  4. Material Formulation: High-density, non-shrinking wax compound.
  5. Best for: Quickly filling deep scratches, nail holes, and medium gouges in white-finished furniture and trim.

Minwax Stainable Wood Filler

Minwax Stainable Wood Filler

  1. Composition: Water-based latex formula for easy soap and water cleanup.
  2. Drying Time: Approximately 2 to 6 hours depending on the depth of the repair.
  3. Structural Integrity: High-performance resin that resists shrinking, cracking, and crumbling.
  4. Finish Compatibility: Specially formulated to accept both oil-based and water-based stains.
  5. Best for: Filling large holes, deep gouges, and cracks in both interior and exterior wood surfaces.

Black Wood Filler and Touch-Up Kit

Black Wood Filler and Touch-Up Kit

  1. Material Base: Water-based, eco-friendly, and low-odor formula.
  2. Net Volume: 8.8 oz (250g) container.
  3. Structural Integrity: High-density composition that is non-shrinking and non-cracking after curing.
  4. Post-Application Processing: Fully sandable, paintable, and stainable to match surrounding finishes.
  5. Best for: Filling large holes, deep cracks, and gaps in dark-toned woods like ebony furniture, black decks, and hardwood floors.

Woodwise White Oak Wood Patch Filler

Woodwise White Oak Wood Patch Filler

  1. Formulation: Water-based and environmentally friendly.
  2. Container Size: 1 Quart (32 oz).
  3. Drying Time: Fast-drying, typically ready to sand in 15–30 minutes.
  4. Safety Profile: Low VOC, non-toxic, and non-flammable.
  5. Best for: Large holes, deep cracks, and professional wood floor repairs.

System Three SculpWood Putty (2-Gallon Kit)

System Three SculpWood Putty (2-Gallon Kit)

  1. Composition: Two-part, solvent-free epoxy resin compound.
  2. Shrinkage Rate: Zero shrinkage, cracking, or pulling away after curing.
  3. Mixing Ratio: Simple 1:1 ratio by volume for easy preparation.
  4. Post-Cure Workability: Fully machinable-can be sanded, sawed, drilled, and nailed.
  5. Best for: Structural restoration and permanent repair of deep cavities or rotted sections.

Wood Furniture Repair Kit with Scrapers and Sandpaper

Wood Furniture Repair Kit with Scrapers and Sandpaper

  1. Drying Time: Approximately 30-60 minutes depending on the depth of the repair.
  2. Finish Compatibility: Highly versatile formula that is fully paintable, stainable, and sandable.
  3. Kit Accessories: Complete 6-piece set including 2 scrapers and 4 pieces of sandpaper.
  4. Structural Integrity: High-density composition engineered to resist shrinking, cracking, and falling out.
  5. Best for: Filling large holes, deep cracks, and restoring damaged wood furniture or flooring.

Gray Wood Filler - Paintable & Stainable

Gray Wood Filler - Paintable & Stainable

  1. High-Density Formula: Water-based, non-shrinking, and non-cracking.
  2. Drying Time: Approximately 30–60 minutes depending on hole depth.
  3. Finish Compatibility: Fully sandable, paintable, and stainable.
  4. Net Volume: 9.5 oz (280ml).
  5. Best for: Filling large holes, deep cracks, and gouges in gray-toned wood or painted furniture.

Gorilla All Purpose Wood Filler, 6 Ounce Tub, Natural Finish

Gorilla All Purpose Wood Filler, 6 Ounce Tub, Natural Finish

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Staring at a massive, ugly hole in your favorite furniture or a deep gouge in your deck can be totally frustrating, but Gorilla All Purpose Wood Filler is the heavy-duty solution you've been looking for to make those eyesores disappear. This high-performance formula is specifically engineered to handle large repairs without the annoying shrinking or cracking found in standard fillers, giving you a rock-solid, durable surface that stands up to both indoor and outdoor elements. Since it's fully sandable, paintable, and stainable, you can easily customize the finish to match your wood perfectly, ensuring your repair looks seamless rather than like a patch job. Stop letting deep cracks ruin your hard work and grab a tub to finish your project right today!

BONCART Flexible Crown Molding Trim

BONCART Flexible Crown Molding Trim

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Staring at a massive, ugly gouge in your favorite wooden table can feel like your DIY dreams just hit a wall, but this high-performance wood filler is about to become your new best friend for those "oh no" moments. To get that surface looking slick again, simply clean out any loose debris, press the putty firmly into the void with a scraper, and let it dry before sanding it down to a perfectly flush finish. Because it's specially formulated with non-shrinking and crack-resistant technology, you won't have to deal with the frustration of sagging or re-filling deep holes, while its professional-grade stainable and paintable texture ensures your repair blends seamlessly into your decor for a result that's as solid as the original wood.

DAP Plastic Wood-X All-Purpose Wood Filler

DAP Plastic Wood-X All-Purpose Wood Filler

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Staring at a massive, ugly crater in your favorite coffee table is enough to ruin any DIYer's day, but DAP Plastic Wood-X is the heavy-duty fix you've been looking for to make those eyesores disappear. To get it done right, just scoop a bit of the formula onto your putty knife, press it firmly into the hole-leaving a slight mound for sanding-and wait for its clever DryDex technology to turn from pink to tan so you know exactly when it's ready to work. Because this stuff is loaded with real wood fibers, it provides a rock-solid repair that won't shrink or crack, allowing you to sand, drill, or screw into it just like the real thing for a seamless finish that looks like the damage never happened.

DAP DryDex Wood Filler

DAP DryDex Wood Filler

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You've finally found the ultimate solution for those massive gashes in your woodwork with DAP Plastic Wood featuring DryDex technology. Trust me, this is the most reliable filler on the market because its unique, high-performance formula goes on pink and dries to a natural finish, eliminating all the annoying guesswork from your DIY projects. Because it is a heavy-duty, solvent-based compound, it offers superior resistance to shrinking and cracking even in deep voids, providing you with a rock-hard surface that is easily sandable, paintable, and stainable. You'll love how the professional-grade consistency anchors firmly into large holes, ensuring your interior and exterior repairs achieve the most flawless, durable finish imaginable.

Premium Wood Filler Putty

Premium Wood Filler Putty

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Staring at a massive gouge or deep crack in your favorite table and thinking it's a lost cause? Don't stress, because this heavy-duty wood filler is the ultimate fix for those stubborn gaps that ordinary putty just can't handle. Its high-solid, shrink-resistant formula means you get a solid, durable fill the first time around without worrying about it pulling away or cracking later, while the stainable and paintable surface ensures your repair blends seamlessly into your furniture's natural look. You'll save hours of frustration thanks to its quick-drying properties, giving you a professional-grade finish even if you're just a weekend DIYer. Stop letting those imperfections ruin your home's aesthetic-grab yours today and make those holes disappear!

MOLLOR Wood Filler Repair Kit

MOLLOR Wood Filler Repair Kit

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Let's face it, that gaping hole in your favorite coffee table is an eyesore you've been hiding with a coaster for far too long. You need a fix that actually stays put, not a flimsy paste that shrinks and cracks the moment it dries. MOLLOR Wood Filler bridges that gap with a high-density, non-shrinking formula that anchors deep into large voids for a permanent, rock-solid bond. Because it sands to a butter-smooth finish and takes stain or paint perfectly, you achieve a seamless repair that makes the damage vanish. Simply fill, sand, and finish. No more stress. Your furniture is saved. Just professional results in minutes.

Goodfilla Water-Based Wood Grain Filler

Goodfilla Water-Based Wood Grain Filler

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Staring at a nasty, gaping hole in your favorite table that makes it look more like a piece of Swiss cheese than a family heirloom? Stop stressing over cheap fillers that shrink, crack, and pop out the second they dry, and grab some Goodfilla-the ultimate heavy-hitter that actually stays put. To get that pro-level fix, just clear out any loose debris from the crater, pack the filler in firmly with a putty knife, let it dry, and then sand it flush for a surface so seamless you'll forget the damage ever happened. Because this formula is packed with high-solids and won't sink or shrink, you get a one-and-done repair that accepts stain and paint exactly like real timber, ensuring your patch blends in perfectly instead of sticking out like a sore thumb. Best of all, since it's water-based with an indefinite shelf life, you can simply stir in a drop of water to revive it if it gets stiff, meaning no more tossing half-used tubs and wasting your hard-earned cash.

Bondo All-Purpose White Plastic Filler

Bondo All-Purpose White Plastic Filler

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When you're staring at a massive, unsightly gouge in your woodwork or a rotted-out section of exterior trim, you need a solution that actually lasts, and Bondo All Purpose Wood Filler is the absolute best tool for the job. This professional-grade, two-part polyester resin formula is engineered specifically to be non-shrinking and water-resistant, which means you get a permanent, rock-solid repair that won't crack or fall out over time like inferior single-part putties. You'll be amazed at how quickly you can work, as the rapid-cure technology allows you to sand, drill, and paint your surface in a mere 15 minutes, saving you hours of frustrating downtime. By choosing this superior, high-performance filler, you ensure that even your most daunting restoration projects result in a flawless, invisible finish that restores both the strength and beauty of your home with total ease.

6-Pack White Wood Filler Sticks

6-Pack White Wood Filler Sticks

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Staring at that massive, eye-sore of a hole in your favorite white furniture can really ruin your day, but you don't have to be a master carpenter to ditch the stress and get your home looking brand new again. These white wood filler sticks are your go-to secret weapon for those deep gouges and craters that regular, runny putty just can't handle. To fix it fast, just clean out any loose debris from the spot, firmly rub the stick back and forth until the hole is completely packed tight, and then use a flat edge to level it off before wiping away the excess with a soft cloth. Because these sticks are crafted from a high-density, professional-grade wax blend, they won't shrink or crack over time, ensuring your repair stays rock-solid and seamless without the mess of sanding or long drying times.

Minwax Stainable Wood Filler

Minwax Stainable Wood Filler

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Staring at that massive, ugly gouge in your favorite heirloom and thinking it's a total goner? Don't junk it. Minwax Stainable Wood Filler turns your DIY disaster into a seamless fix. This heavy-duty formula anchors deep into large holes and resists shrinking, so you won't deal with annoying cracks later. Since it's specially designed to absorb stains and paints like natural timber, your repair blends right into the grain for a professional finish. Just fill it. Sand it. Stain it. You'll forget the hole was ever there. Fast. Durable. Invisible.

Black Wood Filler and Touch-Up Kit

Black Wood Filler and Touch-Up Kit

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You've likely dealt with frustrating, deep gouges in your favorite furniture, but this professional-grade black wood filler is the absolute best solution to restore your home to its former glory. Since you need a reliable fix for large holes, you'll appreciate the high-density, water-based formula that provides incredible structural integrity without the typical shrinking or cracking found in inferior products. It's remarkably easy to use, and because it boasts a rapid-dry technical profile, you can sand and paint your surfaces almost immediately for a flawless, seamless finish. Whether you're tackling a massive floor gap or a chipped cabinet, this superior, heavy-duty filler offers the ultimate durability and versatility, ensuring your repairs look professional and last a lifetime.

Woodwise White Oak Wood Patch Filler

Woodwise White Oak Wood Patch Filler

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You're staring at that massive, ugly gouge in your woodwork and wondering if you've completely ruined your project. Standard fillers often shrink or crack when packed into deep gaps, leaving you with a messy, sunken eyesore. Stop stressing. This heavy-duty wood patch is engineered specifically for large-scale repairs, gripping the wood grain to provide a rock-solid foundation that stays put. Because it sands down like butter and accepts paint or stains effortlessly, you get a seamless, professional finish with minimal effort. No shrinking. No cracking. Just a flawless surface. You've got this.

System Three SculpWood Putty (2-Gallon Kit)

System Three SculpWood Putty (2-Gallon Kit)

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When you're tackling those intimidating gouges and rot-damaged areas, you'll find that this two-part epoxy putty is the ultimate solution for achieving a flawless, professional-grade restoration. You'll appreciate how its solvent-free, 1:1 mixing formula creates a lightweight, dough-like consistency that allows you to easily mold it into large voids without the frustration of shrinking or sagging. Because it cures to the same density as natural timber, you can sand, drill, and carve your repair with incredible ease, ensuring it blends seamlessly with your original surface for the most durable finish possible. By utilizing this high-strength chemical bond, you gain the absolute best structural integrity for your wood projects, transforming what used to be a difficult chore into your easiest and most successful repair yet.

Wood Furniture Repair Kit with Scrapers and Sandpaper

Wood Furniture Repair Kit with Scrapers and Sandpaper

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Staring at a massive, unsightly gouge in your heirloom table or a deep crack in your floorboards can feel like a total DIY disaster, but this professional-grade wood filler kit is exactly the heavy-duty fix you've been looking for. We've packed this high-density formula to fill large gaps without shrinking or cracking as it dries, giving you a rock-solid, permanent repair that actually stays put. Because it's fully paintable and stainable, you can easily match your existing finish for a seamless look that makes the damage disappear like it was never even there. Since we've included all the scrapers and sandpaper you need right in the box, you can achieve a smooth, pro-level surface without a single extra trip to the hardware store. Stop stressing over those damaged surfaces and restore your home's beauty-grab your repair kit now!

Gray Wood Filler - Paintable & Stainable

Gray Wood Filler - Paintable & Stainable

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You know those frustratingly deep gouges and massive cracks that ruin your favorite woodwork? Well, you can finally fix them for good with this high-performance gray wood filler, which stands out as the absolute best solution for heavy-duty structural repairs. Engineered with a specialized high-solids, non-shrink technical formula, this professional-grade compound allows you to fill even the most substantial voids in a single pass, meaning you won't have to waste time on multiple applications or worry about the filler pulling away as it cures. Because the formula is specifically designed for maximum adhesion and durability, you get an incredibly tough finish that sands down easily to a perfectly smooth surface, providing you with the ultimate foundation for any finish. Since it is both paintable and stainable, you'll have the most versatile tool in your kit for achieving a flawlessly seamless look that makes your old surfaces look brand new again.


Structural integrity and drying times for deep cavity wood fillers

Maintaining structural integrity in deep cavities requires balancing mass with evaporation or chemical cure rates. Standard water-based fillers often fail in deep voids because the outer shell hardens, trapping moisture inside, which leads to a soft, unstable core. For depths exceeding 1/4 inch, drying times increase exponentially rather than linearly.

  • Water-based: 24–48 hours depending on humidity.
  • Solvent-based: 1–4 hours for medium depths.
  • Chemically cured (Epoxy): 30 minutes to 6 hours regardless of depth.

Minimizing shrinkage and cracking in high volume wood repairs

Shrinkage occurs when the carrier liquid (water or solvent) evaporates, pulling the filler mass away from the cavity walls. High-volume repairs are particularly susceptible to radial cracking and perimeter gaps. To minimize these risks, professionals select fillers with high solid content or non-shrinking chemical reactions.

Feature High-Shrinkage Low-Shrinkage
Base Type Water/Latex Two-part Epoxy/Polyester
Application Single thick layer Staged layering
Result Concave surface Flush/Proud surface

Two part epoxy versus solvent based fillers for structural voids

The choice between epoxy and solvent-based fillers depends on the required structural contribution. Two-part epoxies create a molecular bond with the wood fibers, effectively becoming a permanent part of the timber's geometry. Solvent-based fillers are generally harder but more brittle, making them suitable for aesthetic repairs rather than load-bearing voids.

  1. Epoxy: Zero shrinkage, excellent flexural strength, waterproof.
  2. Solvent: Rapid drying, high hardness, susceptible to vibration cracking.

Maximum depth limitations and layering techniques for large holes

Most evaporative fillers have a maximum depth limit of 1/8 to 1/4 inch per application. Exceeding this causes internal voids and "slumping." For large holes, layering is the standard protocol to ensure each stratum cures fully before the next is applied.

When layering, the surface of each layer should be left slightly textured to provide a mechanical key for the subsequent application. This prevents delamination within the repair mass.

Compressive strength and load bearing properties of large hole fillers

In structural applications, the filler must match or exceed the compressive strength of the surrounding wood species. If the filler is too soft, the repair will compress under load; if it is too hard, it may cause the surrounding wood to crush or the filler to pop out during seasonal movement.

  • High-density epoxies: 6,000–10,000 psi.
  • Softwood timber: 3,000–5,000 psi.
  • Hardwood timber: 7,000–12,000 psi.

The chemistry of adhesion in wide gap timber restoration

Adhesion in wide gaps relies on both mechanical interlocking and chemical bonding. For restoration, the filler must penetrate the tracheids and vessels of the wood. Using a liquid consolidant or primer before applying a thick filler mass significantly improves the interface strength, preventing the "plug" from falling out during thermal expansion.

Managing exothermic heat reactions during deep pour wood filling

Two-part resins generate heat (exotherm) as they cure. In deep pours, this heat can become trapped, causing the filler to smoke, yellow, or crack. To manage this, technicians should use "slow" hardeners for deep pours or limit pour depths to 1 inch intervals to allow heat dissipation.

High ambient temperatures accelerate this reaction, potentially leading to a runaway exotherm that ruins the repair and damages the surrounding wood fibers.

Internal reinforcement methods for oversized vertical wood repairs

Vertical repairs face the challenge of gravity during the curing phase. For oversized voids, internal reinforcement acts like rebar in concrete. This prevents sagging and adds shear strength to the finished repair.

  • Stainless steel screws driven into the back of the cavity.
  • Fiberglass mesh embedded between layers.
  • Bamboo or hardwood dowels for longitudinal bridging.

Evaluating moisture resistance in bulk wood fillers for exterior use

Exterior fillers must withstand the hygroscopic movement of wood. Bulk fillers that are overly rigid will eventually fail when the wood expands due to moisture. The ideal exterior filler maintains a degree of elasticity and has a low vapor permeability to protect the cavity from rot.

Exposure Level Recommended Filler Type
Fully Sheltered Water-based or Solvent-based
Direct Rain/Sun Epoxy or Polyurethane-based

Technical requirements for sanding and finishing over dense filler mass

Large filler masses often have different absorption rates than natural wood. Once cured, dense fillers require mechanical sanding starting at 60 or 80 grit to level the surface. Because these fillers are non-porous, standard wood stains may not penetrate. A film-forming finish or a specialized primer is often required to ensure color uniformity across the repair and the timber.


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Marcus Thorne brings over 15 years of experience in executive search and corporate headhunting to Covlett.
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