Model # DU-4

Internet #202535298

Store SKU #865311

Durham's Rock Hard DU-4 4 lb. Water Putty
0076694000046

Durham's Rock Hard

DU-4 4 lb. Water Putty

  • Makes long lasting repairs
  • Use internally or externally
  • Easy to use
$798 /each

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Product Overview

For 80 years, Durham's Rock Hard Water Putty has been making repairs in wood, plaster, drywall, stone, tile, concrete and other stable surfaces. Just add water to this powdered material, apply it into voids, cracks and holes. When thoroughly dry, it can be sanded, drilled, sawed and painted. Repaired areas are very hard and long lasting. Durham's can also be cast or molded to reproduce missing trim pieces or in handicraft or artistic applications.

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Customer Questions & Answers

does thisputty work with stain colors??

Asked by: cruzito
Well, not exactly. I don't recommend it. I have tried to use it in wood that is stained. Unfortunately it does not absorb as much stain as the wood so it will appear lighter in color and does not absorb it uniformly.
Answered by: TheHeater
Date published: 2017-06-01

How long does this product take to dry

Asked by: James603
dry to the touch about an hour. Completely dry over night
Answered by: Charles
Date published: 2017-06-09

what kind of primer do i use for painting

Asked by: dano
Any primer will work. This putty is very hard and not very absorbent so Latex and Oil Based paint will work on it. You still may need to sand as you would with wood prior to painting.
Answered by: TheHeater
Date published: 2017-06-01

Can this be stained?

Asked by: drae
Yes, you can stain it, but NO, it will not look very good, as it does not uniformly absorb stain and the color is a mixed bag of results. It certainly won't match the color of the wood that is stained if that is your desired result.
Answered by: TheHeater
Date published: 2016-09-12
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Customer Reviews

DU-4 4 lb. Water Putty is rated 4.4 out of 5 by 19.
Rated 5 out of 5 by from I have used Durham's for years. As I have read through these reviews I was easily able to spot th... I have used Durham's for years. As I have read through these reviews I was easily able to spot the difference between the weekend DIY's and the Professional's. The first thing I will say is if you are having any trouble with this product then you are not using it correctly. You MUST mix it up to the correct water to powder ratio. If it is too thin then you are using too much water. If it is too thick you are not using enough water. Pretty simple. As for the guy that said it was complete garbage and he wasted his time and money. I would have go along with he has no clue on what he was doing. Over the decades I have found this stuff does exactly what it is designed to do. Get hard and patch the holes. I had to practice with it a few times the first time I have ever used it but after learning how to mix it I have not ever have any more problems with it. Tomorrow I am going to try to mix some water based stain with it to see if it will hold the stain.
Date published: 2017-02-24
Rated 5 out of 5 by from Amazing stuff. does exactly what it's name is. This stuff goes in like water, so, seal up all your cracks. sets like a rock. prepare to pre-drill your holes. fills all the knoocks and crannies, then turns hard, hard, hard, Not brittle, like cement, takes screw threads w/o cracking. Adheres to every substrate I have challenged it with.... If, your wood is rotten, drill some holes, pound until the loose stuff is out. then fill'er up, better than new!! Love it!! Way cheap for what is does!! excellent performance!! I leveled concrete stairs with this stuff( 1" thick) in 1991. I have moved but it is still there today (2012). I fixed door jams in rental houses, they are still swinging solid.. Still there.
Date published: 2012-08-07
Rated 5 out of 5 by from Works for large dry wall cracks! Works for large dry wall cracks!
Date published: 2016-12-20
Rated 5 out of 5 by from Good Deal Bought this on-line. It looked the same size as a typical "plastic wood" can. Much to my surprise it is about the size of a half-gallon of milk. Better yet it is a powder that mixes with water. I've had my share of partially used cans of wood putty that end up dried out when you go back to use them for a second time. This product won't go bad!!! Used it to cover up some deteriorating exterior trim. Mixed well, applied without difficulty, dried nice and hard for painting. Quite pleased.
Date published: 2015-08-04
Rated 5 out of 5 by from Every Home Should Have Some! I used this product to repair some wood rot on an outdoor window sill that was above sight level. It did a great job! I didn't know how to replace the wood, and I didn't really know any carpenters to call, so I thought I would give this a try after reading how to repair wood rot on the internet, some people recommended using Durham's Rock Hard. I made a form to match the line of the window sill out of wire fabric and stapled it to the good wood, and I mixed several small batches of Durham's Rock Hard up and put on thin layers and let each one dry until it was built up and molded to match the window sill. I painted it, and the finished job looked great! It's very economical to use. You have to make small batches, because when it starts to set up, there's a small time that you can work it before it gets hard. You should make a small batch to get used to the qualities before you apply it to your project so you know what you're working with. I found it easiest if you have to make several batches for a larger job, is to mix up the Rock Hard in something plentiful and disposable- like paper cups or styrofoam bowls, and throw them out after each batch, and use a plastic putty knife and keep a bucket of water handy to rinse your tools in. I have an old house, and I also used Rock Hard to fill in places on the exterior where the paint was chipped and had been repainted. I mixed up small batches, and used a putty knife to smooth them out, and blended them with a wet sponge, and painted them when they were dry, and the finished product looked good. I hope this review is helpful, I needed several batches, and I just ran into the problem of running out of containers to mix it before I figured out to use the disposable containers, which made the job easier.
Date published: 2013-02-28
Rated 4 out of 5 by from Good cost efficient product very cost efficient. Sets quick and hard (do not waste time); after sanding becomes part of whatever was being patched. Very durrable
Date published: 2012-06-17
Rated 5 out of 5 by from Works exactly as advertized. Best product for filling interior or exterior painted wood. I've used this product since my father taught me about while repairing exterior wood trim on my first house 40 years ago! Absolutely the best product out there for patching woodwork prior to painting. Mixes with water, and dries rock hard, to a firm, sandable, paintable surface. People who have founds this product to be inferior clearly did not follow the mixing directions! Great stuff!
Date published: 2016-01-29
Rated 4 out of 5 by from Great for patch jobs Needed this for an old beat-up door and jamb on retail. This did great on the door and jamb, filling a cracks and even a missing chunk in jamb. Sands down very well for painting. The one thing it did not do well was hold screws. I still needed a larger strike plate for the damaged door jamb.
Date published: 2014-06-18
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