How to make Concrete Molds

If you want to cast concrete figures, concrete furniture or decorations from concrete, then you need appropriate casting moulds. These can be made from different materials, with sometimes more, sometimes less effort.

In addition, you can also use everyday objects and perhaps not at first glance intended objects to make casting moulds for concrete. In this guide we have summarised a few possibilities, tips and tricks that will help you to make your own concrete casting mould.

How to make Concrete Molds? Here you will get answers and learn how to make or improvise a mould for pouring concrete yourself. Have fun doing handicrafts!

Mold: Concrete in mold casting

You can use a standard bowl for soups, muesli, etc. to pour concrete into a mould.

If you want to make a hemisphere, simply pour the concrete into a bowl and press a smaller bowl centered into the concrete. This gives you a solid, hollow hemisphere after the concrete has hardened.

With other shapes and objects you can be similarly creative. So you have the possibility to produce a “concrete bottle” by pouring the building material into a glass bottle and carefully knocking it off after hardening. Surely you will find more hollow bodies for such a procedure.

Silicone mould for concrete deco

Silicone moulds have also become indispensable in the household and for the production of concrete decorations. For example, ice cube or praline moulds as well as cupcake and other silicone baking moulds are ideal for pouring concrete. The advantage of silicone casting moulds for concrete is that the building material can be flexibly removed from the moulds without these possibly breaking. There are many different silicone moulds for pouring dough, water, chocolate and other great kitchen utensils – just use them to make concrete figures, concrete moulds, paperweights, etc.

DIY 1: Moulds for Concrete made of cardboard / Karto

Of course, you can also make it easier and more individual by pouring the building material of cement, sand and water into cardboard moulds. Here, however, it is important to ensure that the cardboard is given a protective layer by means of foil, adhesive tape or other sealing materials. Depending on the size of the object to be cast and the amount of concrete required, you should also support the walls of the cardboard mould from the outside. The protection from the inside ensures that the cardboard form does not soak. The support from the outside ensures that the cardboard walls withstand the pressure of the concrete mass.

Important to know: How much concrete do i need?

DIY 2: Concrete casting mould made of styrofoam / styrodu

Some shapes may be too complex, too round or wavy, with too many angles or too simple for the use of cardboard. To produce filigree casting moulds for concrete and perhaps also to be able to add one or two 3D details, simply use Styrofoam or the finer-pored Styrodur. With a knife or hot wire (for smoother edges) cut out the desired cavity and fill it with concrete. If you only want to make the walls of the concrete mould from Styrofoam, Styrodur or the like, you can glue them to a wooden, cardboard or plastic base plate. Also note that the base plate should not soak.

DIY 3: Plaster mould for concrete casting

In the third DIY tip, we suggest using gypsum to make a mould for concrete. Of course the effort is a bit higher, especially as you first have to form and harden the plaster, then fill in the concrete and let it harden. You can make various shapes out of plaster. If you have made a plaster mould of this or that object, of a body part or something else, use it for the building material made of sand, cement and water.

Instructions as video on Youtube

Silicone moulds are of course the best, also because they can be used again and again. A silicone mould can be used multiple times for casting concrete or plaster. It is therefore worth the effort to produce a silicone mould yourself. A few video instructions on YouTube reveal how to make a silicone mould yourself.

If you are looking for a guide to building concrete furniture, this link shows you how to do it.

Be creative with concrete

Pouring concrete into form to creatively create decoration is not only a welcome change from commercial decoration for home, office and garden, but also ideal to create a hobby.

If you process something with your own hands, you can live out your creativity and give your head something to do. And in addition, gifts are created for the family and their house, office or garden. Whether with or without video guidance from YouTube – try it out and work in popular DIY fashion to make concrete figures, concrete furniture and more. The trend towards grey design units is not only en vogue in 2021.

Concrete sealing: Make concrete surface durable

We hope you can implement great and creative concrete ideas thanks to our tips, tricks and suggestions. We have many more guides, instructions and knowledge articles in our collection! We also offer you a selection of products for the treatment of concrete surfaces. We have our DUALTREAT products in stock for professional users and service providers who offer maintenance, renovation, servicing and other measures for concrete surfaces, facades, walls and roofs.


A star made of concrete or furniture, decoration and door stoppers – much is possible with a little creativity and concrete from the DIY store.

If you want to mix concrete yourself, you’ll find in this article not only the title question is answered, but also further information, data and values are given.

You are also welcome to browse through our other pages and view various articles, guides and instructions. Discover what you can do with concrete. Soon you will be a professional in concrete, sealing concrete surfaces, painting and wallpapering concrete walls and much more! Have fun!

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