Rubber door mats

February 10th, 2014 by

A really nice thing you can cast is larger stepping stones using rubber doormats in a mold. I got hold of two  different rubber mats with different sizes. I made one mold for each mat and used a steel mesh to reinforced the concrete because it is so big.
When casting, I filled one layer with concrete in the mold, then I put the steel mesh in and one more layer of concrete. I patted down the rubber mat up side down.
Then, I left it to harden for two days before I took apart the mold and removed the rubber mat. To get a nicer finish I used a rotating wire brush to get rid of the casting flash.





18 19 20 21 24


  • Lori from Tennessee

    I LOVE these!! I’d love to put down slate to create a 10′ x 12′ patio from my front porch to the driveway but those are so expensive but these are much more beautiful than the slate ever would be! Will also have to go look at concrete tints before I decide if I want to tint the concrete or leave it natural.

    Question please: If after leaving the rubber mat in the mold for 2 days, are able to reuse it for more “stones” after you pull it out because I’d need multiples. And by “casting flash” do you mean your use the wire brush to get rid of the “crispness/distinct edges” left by the mat in the concrete to make the imprint have a little more softer edge?

    • Monicascreativeroom

      Hi Lori, Yes the rubber mat can be reused several times.
      The edges can be quite distinct and I use the wire brush to soften them. I use a rotating wire brush in the drilling machine because it is easier and much faster. Keep in mind that it is quite dusty so use eye protection and a dust mask.

  • Mary Brock

    Doesn’t the rubber mat tear up when you pull it off the dried cement? These are just lovely!

    • Monicascreativeroom

      If you do not pat it down too deeply into the concrete, it’s no problem to pull the rubber mat gently of. The back of the mat must always be visible. It must not be below the concrete.

  • Danielle

    Hello, you really have a super idea here. I have a few questions for you. How do you make the rectangle mold? And what materials do you use? Can you spray anything on the mat like WD-40 to keep it from sticking? How many sacks of concrete per mold? Thank you.

    • Monicascreativeroom

      Hi Danielle, I can’t take credit for this idea. Some years ago I read in a Swedish garden forum and saw this idea. I immediately felt that I had to try this and was delighted with the result. 🙂
      I used junk pieces that were left over from our house renovation to make my molds. You need a base plate and four bars. The bars should be wide enough to hold at least 2 inches of concrete plus the rubber mat. Cut the bars and screw them together to make a frame. The frame should be slightly larger than the rubber mat. Screw the frame down the bottom plate. Now the mold is ready.
      You can use WD-40, silicone spray or cooking oil on the rubber mat to prevent the concrete from sticking.
      You need about 13 liters of ready-mix concrete for the smaller mat and 18 liters for the bigger if you make them 2 inches thick.

  • jk

    Can these be cast with hypertufa ?

    • Monicascreativeroom

      I don’t think hypertufa is strong enough for this.

  • Stephanie Barber Tyler Mead

    Would you consider making a video of making one of these and putting it up on youtube or some other social networking site like facebook.

    • Monicascreativeroom

      I’m sorry but I will not make a video of this. I’m not planning to make any more of these because I have not figured out what to do with the four ones I already have. 🙂

      However, I have saved the rubber mats and the mold if I would like to make more of these in the future.

      • Amanda Shorey

        That was going to be MY question…. were the rubber mats ruined when they were removed. I’m a novice, so this may sound silly, but did you have to put anything on the mats before pressing them in, to ensure they came off in one piece? ***Never mind… I kept reading & found my answer. 🙂

  • Carolle

    These are really beautiful. Thank you so much for the excellent instructions, it is very generous of you.

  • Pingback: 29 Cheap And Easy Backyard DIY Projects()

  • Pingback: 10 Awesome DIY Rubber Mat Projects to Adorn Your Home | Interior Design Blogs()

  • tisha

    What do you lay the wood frame on?

    • Monicascreativeroom

      I just use scraps from when we put in new ceiling in the house. It’s only foiled chipboard but you can use whatever you have.

  • Oumalay

    Are the mats uncomfortable to walk on barefoot? I would love to make a path with this design but my family enjoys to go barefoot. Thanks for posting! Great instructions!

    • Monicascreativeroom

      If you grind the top carefully so there are no sharp edges, you can walk barefoot on them without problems. I also like to walk barefoot and have no problem to walk on mine.

  • Casey Nicole Craig

    This is so neat..What did you use on the bottom of your mold (the white part)

    • Monicascreativeroom

      it’s foiled chipboard and it’s just leftovers from when we put in new ceiling in the house. 🙂

  • dianne

    Question Monica, I see your finished pavers are 2 colors: The background or indented design is white and the raised part of the design looks to be the natural concrete color. How did you paint these? Before you removed the rubber mat? And what kind of paint did you use?

    • Monicascreativeroom

      I have not painted them at all. The only thing I did was grinding the top surface with a rotating wire brush to make them smoother to walk on.

  • kim

    What is the metal bars on top of the rubber mat for?

    • Monicascreativeroom

      The steel mesh is to reinforce the concrete. The finished stepping stone is quite big and without the steel mesh the risk of it to crack is bigger when walking on it.