Best Exterior Wood Filler of 2026

Three words in the product description do more for an outdoor repair than anything else in this category: UV, salt water, dry rot. PC-Woody is a two-part epoxy paste mixed one to one by volume, and the cured repair is rated to shrug off sunlight, fresh water and salt water — the three things that actually finish off exterior wood. That combination of resistance and hardness is what makes it our top pick.

High tack is the part we appreciate most in use. Exterior damage sits on window sills, door frames and railing caps, and none of those faces are horizontal; a filler that sags out of the repair before it sets has wasted your afternoon. This one holds its shape while it hardens, and the listed application range of 35 to 115 degrees F means a cool fall day is still workable. Full cure takes 24 hours.

Mixing is the tax. Equal volumes of part A and part B, worked together on a flat surface with a stiff putty knife, and the label specifically says not to mix it with gloves on. The paste is thick, closer to peanut butter than to anything from a squeeze tube, and it needs thorough combining or you'll sand into soft spots tomorrow.

Against the rest of this set, it's the one product that handles a rotted sill and a hairline crack without a change of tools. The J-B Weld stick is quicker for a single hole and SculpWood is better when a whole corner is gone, but neither covers the middle ground as neatly. Mix only what you can place in one sitting.

Fifteen minutes is the number that sells Bondo: mix the filler with the cream hardener, spread it, and you can be sanding while a latex filler is still wet. The two-part chemistry bonds to the wood instead of sitting on top of it, and the repairs are non-shrinking — which is what you want in a railing or a door frame that takes weather and knuckles.

We rate it the fastest hard repair here for large, paint-grade exterior damage. A 30-ounce container with a half-ounce tube of hardener goes a long way, and per ounce it's the cheapest of the two-part products in this group, which matters when you're rebuilding a run of shed trim rather than a single nail hole.

Speed cuts both ways. Once the hardener goes in, the clock is running, so mix small batches and keep your placement tidy. A trick worth knowing: run a sharp chisel over the excess a couple of minutes after application and you'll save most of the sanding.

Sanded to a feathered edge, the patch disappears under primer, and the cured filler stands up to an orbital sander without tearing out. That's the whole case for keeping a container on the shelf.

Sometimes the entire job is one stripped hinge screw and a gouge the size of a thumbnail in a door frame. That's not a two-can, measure-and-mix situation, which is the gap the J-B Weld KwikWood stick fills.

Cut off a slice, knead it between your fingers until the two parts are one color, and press it into the hole. Set takes 15 to 25 minutes and full cure about an hour, after which the putty can be sanded, drilled, tapped, shaped and stained. It won't shrink or rot, which is the part that matters outdoors.

We keep coming back to it for small exterior spot repairs, because there's nothing to measure and nothing to clean up afterward. The same stickiness that holds it in a vertical hole makes it grab at your fingers while you knead, so work in small pieces and press it home with a putty knife rather than a thumb.

One ounce is the catch. It covers a few holes and no more, which makes the stick a supplement to a tub or a can rather than a replacement for one. Keep the unused portion sealed; kneaded leftovers are already curing.

A quart kit changes the economics of epoxy filler. SculpWood arrives as two parts you mix one to one by hand, and the result behaves like modeling clay — it holds the shape you press it into instead of slumping off a vertical face, which is what lets you rebuild a missing corner on a porch post rather than skim over one.

It's waterproof, it won't shrink or turn brittle as it cures, and once hard it can be sanded, carved or machined like wood. Full cure takes about a day, so this is a plan-ahead repair rather than a Saturday-morning one.

The sticker is the highest in this guide, and it's fair to flinch at it. By volume, though, a quart lands close to the smaller epoxy kits here, so a genuine rebuild — a sill with a chunk gone, a door bottom that's been soaking for years — is better value than the price suggests.

It cures brown, so plan on a topcoat to bring it back to the color of the surrounding trim. For sheer volume of damaged exterior wood, nothing else here covers as much ground.

White paste in a 6-ounce tube that applies like caulk is a narrow product. On white exterior trim, it's the right narrow product: DAP's Plastic Wood goes onto corners and vertical faces where a runny filler would end up on your shoes, and it dries to a white that can pass for fresh paint on a nail hole.

That's the whole appeal. On painted white trim, a color that matches means one less step, and the thick knife-grade body stays where it's put. We think it's the best choice here for finishing-nail holes, hairline cracks and small dings on exterior trim that's already white.

Limits are real. This is latex, not structural, and the schedule reflects it: 3 to 6 hours for fills up to 1/8 inch, roughly 36 hours at a quarter inch and deeper. Expect to layer deep holes. The white can also read light gray against a bright white paint, so test a patch on scrap before you commit.

While it's wet, a damp fingertip smooths the bead and water takes the residue off your hands, the trim and the tools. That ease is most of why it stays in the rotation.

Open a tub of Gorilla wood filler and you find out fast which one you got. Some tubs are a smooth, spreadable paste; others arrive dry and gritty, closer to damp sand than to putty. That variation is the honest headline on an otherwise useful, inexpensive product.

When the tub is right, it's pleasant to use. It spreads into a crack, sands down as smooth as the wood around it, and takes paint without a fight. The formula is acrylic and water resistant, rated for indoor and outdoor work, and the label claims it won't shrink or crack while also anchoring nails and screws.

A dry tub isn't a lost cause. Work in a splash of water and mix until the paste spreads again — the container has usually lost moisture on a shelf rather than failed outright — then use it in thin lifts so whatever water is left has somewhere to go.

Movement is where it struggles. On exterior joints that flex with the weather, a latex filler can crack and crumble rather than hold, and deep fills show it first. Keep this one to shallow cosmetic work on stable trim.

Where it earns its shelf space is volume: a 16-ounce tub covers a lot of trim for very little money, and if the first tub arrives dry you now know what to do about it. Buy it for square footage, not for strength.

Abatron's 12-ounce kit costs about what our top pick costs, and it buys something different: a putty you can saw, plane, carve and nail once it's hard, made without solvents and certified GREENGUARD for low emissions. On a window sash or a porch column where you'll be shaping the repair afterward, that distinction matters more than raw strength.

The working window is the friendliest of the epoxies here — 20 to 30 minutes of pot life, enough to mix, place and tidy a repair without sprinting. Full cure is listed at two hours, and the cured putty sands, paints and stains.

Our reservation is grip. It holds best on rougher, weathered or rotted surfaces; on smooth, freshly planed stock it can struggle to grab, so rough up the face first and don't expect it to bridge a slick surface on its own. It's also the priciest small kit here. For restoration work where the repair gets shaped after curing, neither point is disqualifying.

Most exterior fillers are paint-grade, and you find that out the moment stain hits the patch and goes flat while the wood around it warms up. Minwax's 16-ounce filler is formulated to accept oil- and water-based stains, which makes it the pick here for stained exterior wood — deck boards, cedar siding, a refinishing job where paint was never the plan.

Underneath the stain claim it's a conventional latex filler for cracks, small gouges, nail holes and knot holes, rated for indoor and outdoor use. Shallow repairs dry in about two hours, which keeps a staining project moving.

Stainable isn't the same as invisible. Filler and wood absorb stain differently even when the chemistry is right, so test on an offcut before you commit to a run of siding. Deep fills take far longer than two hours and want layering.

Sand it flush, wipe the dust, and finish it on the same schedule as the surrounding wood. On a stained surface, that timing is the whole game.

A water-based latex that's ready to sand in about a quarter of an hour is a different tool from the epoxies on this list. Famowood goes on creamy, feathers out at the edges and sands to a smooth face — with 400 grit it polishes down to something a finish will sit on happily.

There's no mixing, next to no smell, and cleanup is water. For a run of trim repairs where you want to fill, sand and get on with priming, that pace is the point.

Two things to plan around. It isn't waterproof — it soaks up water — so outdoors it needs a topcoat, and that topcoat has to stay intact. On deep or wide fills it can crack and crumble as it dries, so build in layers rather than one thick application.

Stain is the other uneven spot: it takes stain, but the patch can read lighter or darker than the surrounding wood, so test on an offcut before you do a visible run. Fast, smooth and easy to sand, it's the filler for primed exterior trim — not for a wide repair on bare wood that faces the weather.