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GRP2003_2
In stock
Choose from eight wood tones plus white and black. Dual-purpose filler for everything from nail holes to wood grain.
Versatile Wunderfil™ works great on both finished and unfinished wood. Use full strength for holes or thin with water for filling open grained woods. A water-based, stainable formula makes cleanup a snap!
Versatile Wunderfil™ works great on both finished and unfinished wood. Use full strength for holes or thin with water for filling open grained woods. A water-based, stainable formula makes cleanup a snap!
Dual-purpose filler for everything from nail holes to wood grain. Versatile Wunderfil™ works great on both finished and unfinished wood. Use full strength for holes or thin with water for filling open grained woods. A water-based, stainable formula makes cleanup a snap! Original Natural Oak Wunderfil is also available in pint and quart sizes separately.
(1) Wunderfil Wood Filler, 8 oz.
| Brand | Wunderfil |
|---|---|
| Weight | 0.9300 |
| Technical Documents | |
| Size | 8 oz |
| Species | Cherry, Golden Brown, Light Oak, Maple, Medium Brown, Natural Oak, Walnut, White Oak |
Keep out of reach of children. CAUTION: Avoid breathing sanding dust. Use and OSHA-approved dust mask. Contains silica. Do not ingest.
WARNING: Drilling, sawing, sanding or machining wood products can expose you to wood dust, a substance known to the State of California to cause cancer. Avoid inhaling wood dust or use a dust mask or other safeguards for personal protection. For more information go to www.P65Warnings.ca.gov/wood
WARNING: Cancer & Reproductive Harm - www.P65Warnings.ca.gov
4.7 / 5.0
34 Reviews
Excellent product
Over all, this is my go-to wood filler.
Pros:
I like that it is water based. If it ever gets a bit dry, it's easy to re moisten it. But if it dries completely, its done.
Takes stain well and readily takes dye if you want it pre-colored.
Super easy to sand when dry.
Cons:
A lot of shrinkage. Expect to re apply if your nail holes are deep. A heat gun won't hurt it if you're in a rush.
Pros:
I like that it is water based. If it ever gets a bit dry, it's easy to re moisten it. But if it dries completely, its done.
Takes stain well and readily takes dye if you want it pre-colored.
Super easy to sand when dry.
Cons:
A lot of shrinkage. Expect to re apply if your nail holes are deep. A heat gun won't hurt it if you're in a rush.
Restored 1940 Silvertone Model 101
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No more dark grain on stained red iak
Solved problem of excessively dark red oak grain.
Patrick Jones, Manager at the Altamonte Springs, FL provided excellent instruction on how to use and the results are a significant improvement: my test sample came out beautifully as the grain was nowhere near as dark after staining.
Patrick Jones, Manager at the Altamonte Springs, FL provided excellent instruction on how to use and the results are a significant improvement: my test sample came out beautifully as the grain was nowhere near as dark after staining.
Top: Wonderfil applied
Bottom: no wood filler applied
Single coat of GF Oil based Gel Stain, Nutmeg
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Easiest wood filler to use
Even though I chose the wrong color for Red Oak, it was useful on two other projects that are paint overs. “The customer gets what they ask for.” But this filler doesn’t dry up as fast a the Minwax stuff, and is easier to work with. I will definitely buy more. Big Al.
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Terrific!
Best wood filler I've come across. Easy to apply, dries fast and finishes well.
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Fills Grain AND Tearouts, Takes Dye and Sands Easily
I love the way the Wunderfil filled grain and sanded. It dried really fast (1 1/2 min) so I had to seal small areas at a time. Wunderfil's ability to fill deeper pores and tearouts was superior to the other grain fillers I tested.
I thinned with water to the consistency of heavy cream to fill grain. Wish it came in black, I used universal dye to dye it jet black, over a vinyl sealer, so my pores would be black.
Wunderfil sealed the grain beyond 90% and the neck (mahogany guitar neck) is more or less smooth like glass. I will continue to use Wunderfil.
Having had issues with Aquacoat turning white inside the pores of mahogany (probably my fault, but unsure) , I dug out a jar of Wunderfil (water based ) I bought from Rockler at least 10 years ago. After a stirring session (20 minutes maybe) I tried it on a test panel, and it was good. Very amazing. You have to stir this product folks, and its not the like stirring a cake mix, it takes a lot of time and effort.
I dyed it black (took LOTS of black dye) and tried THAT combination on the test panel, and it was good.
After a nice coat of vinyl sealer, I grain filled the mahogany, which had been stripped. The water-thinned and dyed Wunderfil grain filler worked marvelously. Used 2 applications. After the 2nd fill was applied, I bagged my filler cup in saran wrap so it might be good the next day.
Next morning, the filler was still usable, so I did a spot fill of a small but nasty little grain tear out and two DEEP long grains, and they filled famously. Sanded the whole affair lightly and carefully with 320 fre-cut (I used dye on the bare wood as the stripper bleached it out a little) . The filled mahogany looks like I envisioned it looking, with the pores black from the dye.
I thinned with water to the consistency of heavy cream to fill grain. Wish it came in black, I used universal dye to dye it jet black, over a vinyl sealer, so my pores would be black.
Wunderfil sealed the grain beyond 90% and the neck (mahogany guitar neck) is more or less smooth like glass. I will continue to use Wunderfil.
Having had issues with Aquacoat turning white inside the pores of mahogany (probably my fault, but unsure) , I dug out a jar of Wunderfil (water based ) I bought from Rockler at least 10 years ago. After a stirring session (20 minutes maybe) I tried it on a test panel, and it was good. Very amazing. You have to stir this product folks, and its not the like stirring a cake mix, it takes a lot of time and effort.
I dyed it black (took LOTS of black dye) and tried THAT combination on the test panel, and it was good.
After a nice coat of vinyl sealer, I grain filled the mahogany, which had been stripped. The water-thinned and dyed Wunderfil grain filler worked marvelously. Used 2 applications. After the 2nd fill was applied, I bagged my filler cup in saran wrap so it might be good the next day.
Next morning, the filler was still usable, so I did a spot fill of a small but nasty little grain tear out and two DEEP long grains, and they filled famously. Sanded the whole affair lightly and carefully with 320 fre-cut (I used dye on the bare wood as the stripper bleached it out a little) . The filled mahogany looks like I envisioned it looking, with the pores black from the dye.
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Wonderfil
Easy to work with. I was worried about applying the stain but it turned out great.
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Best putty i have ever used
Only filler i use, 20 + years now
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Fill It Up
I have used other type and brand wood filler. None is as good as Wunderfil. I have used it for over 20 years.
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Wood Filler
This filler dries quickly and is easy to sand. Colors are close to any wood you are working with.
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Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 9 questions
Browse 9 questions
and 17 answers
Why did you choose this?
Rockler Store
Want to try; never used this product.
Ray C
on Jul 31, 2018
This is, by far, the best woodgrain filler I have ever used. It is inexpensive, water thinable, and leaves a mirror finish on oak.
brian
on Jun 4, 2018
Want to try; never used this product.
Ray C
on Jul 31, 2018
Looking for a better quality product than what’s available to general market
Larry E
on Jun 30, 2018
where is the "black ebony" filler? Didn't you have this at one time?
BEST ANSWER: I had to buy black dye, and it took about 1 to 3 by volume, dye to filler. That was a lot of dye.
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- KBore on Dec 6, 2018
If you use Wonderfil on raw wood then go over it with a water-based dye stain like GF’s, will the Wonderfil dissolve or pull up?
BEST ANSWER: I often use a wet rag or sponge to remove excess wonderfil after it has dried, I'd think that it would loosen up if you rub too long or hard. If you just allow the dye to soak in and dry, it should be fine.
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- Jack R on Aug 20, 2018
- Purchased on Aug 23, 2016
I am painting oak veneer hollow core doors and is like to fill the grainy pores. Will this work as far as adhesion?: clean, scuff sand varnished surface, tack off, skim thinned wunderfil, sand smooth, prime with a latex primer, sand smooth, maybe 1 more coat primer, sand, paint with latex paint.
My concern is the wunderfil going on first on the scuff sanded varnish. Or should something be put on first to ensure adhesion?
My concern is the wunderfil going on first on the scuff sanded varnish. Or should something be put on first to ensure adhesion?
BEST ANSWER: I would recommend first using a palm sander to go over the entire door. Use a 200 grit, or higher, sanding disc to avoid burning through the veneer. Then I would apply an oil based primer, such as Zinzer 123. Latex will not adhere to varnish. Apply the primer with a foam roller to get a smooth even layer. Check for remaining grain after the primer dries and sand lightly as necessary by hand using a sanding block and a fine grit sand paper. You can fill minor imperfections with the Wunderfill, but filling the entire door would likely be impractical, as the filler dries quickly and you can only work small areas at a time...and it will likely not adhere well directly to varnish. You should be able to hide the grain with several coats of primer, rolled not brushed, and sanded between coats. You can then apply your latex finish coat over the Zinzer 123. As always, refer to the manufacture's directions on the label for best results. Good luck with your project!
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- Gregory A on Jun 5, 2017
- Purchased on Jul 9, 2015
Will Wunder-fil hold a screw?
BEST ANSWER: This is only for filling holes.
I would recommend that you fill the hole with a piece of dowel and then re drill it.
I would recommend that you fill the hole with a piece of dowel and then re drill it.
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- Rick H Staff on Jul 8, 2015
Can dye be added to add contrast to grain, while filling pores?
BEST ANSWER: Work with just amount you need so as not to mess up the whole jar. . . I have added color to the wood fill. . . Iv'e used sawdust and I've also used a little paint to change up the color. Can't use much, in the form of liquid..
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- Gene N on Jul 27, 2017
- Purchased on Dec 12, 2016
I love this product but over time it dries out and get really hard in the jar. Is there a way to prolong the product? Is there a way to rejuvenate the hardened filler?
BEST ANSWER: I’ve had this problem and I just put small amount of water and reconstitute it with a slot screwdriver. Works fine
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- James T on Jun 21, 2018
We are painting the cabinets in our kitchen and I bought this product to fill the grains in the oak of our drawer fronts. After applying 2 coats and believing the the process was complete I have painted the fronts, sprayed with primer and 2 coats of oil-based paint - but there is still pitting (I assume from not completely filling all grains. Can I lightly sand/scuff the oil-based paint and repeat the filling process, or do I need to completely remove the paint and start over? Thank you.
BEST ANSWER: You might consider additional coats of paint. Putting waterbased over oil based is not a great idea unless the oil has dried for 30 days or longer.
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- KBore on Dec 6, 2018
I am using to fill grain in oak cabinets before painting. What is the best way to clean after sanding before coating with sealer? Tack cloth? Afraid to use damp cloth as it seems to dissolve the product.
BEST ANSWER: If you grain filled over bare wood, you can vacuum, use naptha (lighter fluid) or odorless mineral spirits to clean before sealer. Another suggestion, if you apply vinyl sanding sealer first, before grain filler, and grain fill over it, the vinyl sealer will partially fill the pores. After the grain filler and wipe down with naptha or mineral spirits, another light wash coat of vinyl sealer will lock in (harden) the Wunderfil grain sealer. A tack cloth works well as well (wear rubber gloves lol).
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- KBore on Dec 6, 2018
I want to fill the grain in some white oak countertops and then stain them before applying the finish. I am using Kona stain (dark brown). Will the filler stain like the wood or will it show up when stained?
BEST ANSWER: Typically from my 20+ yr experience, finishing can be very finicky, I usually choose stains and filler from the same maker. However, if you don't leave any residue on the surface, it should stain and finish pretty well were you won't notice the filler at all. But the best method it to sample it. Take a piece of the oak, do the entire process, and see for your self.
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- Martin C on Oct 13, 2016
- Purchased on Mar 30, 2015
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