How to Use Silicone Moulds for Paper Mâché & Fabric Mâché

Silicone moulds are one of the easiest ways to give paper mâché and fabric mâché a more polished, repeatable shape. Instead of building every form freehand, you can press damp paper pulp or stiffened textile into a flexible mould, let it dry and release a lightweight decorative piece with surprisingly crisp detail.

The technique is especially useful for hanging decorations, mobiles, ornaments, reliefs and small sculptural pieces where you want several matching shapes without adding much weight.

How to Use Silicone Moulds for Paper Mâché & Fabric Mâché

Why Silicone Moulds Work So Well

Silicone is flexible, which makes dried paper or fabric much easier to remove than it would be from a rigid plastic or metal mould. You can gently peel the mould away from the finished piece instead of forcing the piece out.

You can use silicone baking moulds, soap moulds, candle moulds or small craft moulds. For your first project, choose a shallow design with simple details and avoid deep undercuts.

What You Can Make

• Botanical leaves and petals

• Moons, stars and celestial shapes

• Pebbles and abstract organic forms

• Christmas ornaments

• Small relief panels

• Lightweight mobile pieces

• Decorative bowl or vessel details

Method 1: Fabric Mâché in a Silicone Mould

Lightweight textiles such as muslin, cotton gauze, cheesecloth and fine cotton are easiest to press into a mould. Silk can also work beautifully for delicate projects, although very slippery fabric may need a little more patience.

Step 1: Prepare the Fabric

Cut the textile slightly larger than the mould cavity so you have enough material to reach the edges. For deeper shapes, several small overlapping pieces are easier to control than one large piece.

Step 2: Add the Stiffener

Coat the fabric with diluted PVA glue or another suitable fabric stiffener. The fabric should be fully saturated but not dripping.

Step 3: Press into the Mould

Press the fabric into the silicone with your fingertips or a soft brush. Work from the centre outwards and make sure the textile reaches any veins, ridges or other details in the mould.

Step 4: Build Strength with Thin Layers

For a sturdier piece, add two or three thin textile layers rather than one heavy layer. This keeps the finished shape light while giving it enough strength to hold its form.

Step 5: Dry and Release

Leave the piece until it is completely dry. Flex the silicone gently away from the edges and then peel the mould back rather than pulling hard on the fabric.

Method 2: Paper Pulp in a Silicone Mould

Paper pulp works particularly well if you want a clay-like surface. The key is not to fill the mould solid unless you actually want a heavy piece.

Press a thin, even layer of well-drained pulp against the inside surface of the mould. Compress it firmly enough to capture the detail, then allow it to dry thoroughly. Depending on the depth of the mould, you may find it easier to let the piece partly dry before removing it and finishing the drying process in the open air.

The Hollow-Shape Hack

For mobiles and hanging decorations, one of the best tricks is to make two shallow matching halves and join them after drying. This creates a three-dimensional object without filling the centre.

Join the edges with a narrow strip of stiffened fabric, a thin band of paper mâché or a small amount of strong craft glue. Before closing the shape, add a thread loop or small hanging point between the halves.

A hollow leaf, moon, star or pebble can look substantial while weighing very little, making it ideal for a mobile.

Tips for Better Results

• Start with shallow moulds before trying deep shapes.

• Avoid moulds with strong undercuts that can trap the dried piece.

• Use several thin layers rather than making the shape unnecessarily thick.

• Let the material dry completely before demoulding.

• For paper pulp, squeeze out as much excess water as possible first.

• Add a hanging loop while assembling hollow shapes rather than drilling them later.

Using the Technique for a Handmade Mobile

Silicone moulds are particularly useful when you want a mobile to feel coherent. You can repeat the same leaf in different sizes, alternate moons and abstract shapes, or create a set of matching botanical forms without each piece looking completely different.

See our full project guide: How to Make a Fabric Mâché Mobile.

If you are new to the basic technique, start with How to Make Paper Mâché: 3 Easy Recipes for Every Project.

Final Thoughts

Silicone moulds make paper mâché and fabric mâché much more versatile. They give you the freedom to repeat shapes, capture small details and make lightweight three-dimensional pieces without complicated sculpting.

For BotanicalBlueprint-style projects, the technique works especially well with botanical leaves, soft organic forms, celestial shapes and simple modern ornaments.

5 FAQs About Silicone Moulds for Paper Mâché

1. Can you put paper mâché in a silicone mould?

Yes. Well-drained paper pulp can be pressed into silicone moulds and dried to create lightweight decorative shapes. A thin shell is usually better than filling the mould completely.

2. Can you use fabric in silicone moulds?

Yes. Lightweight fabric coated with glue or fabric stiffener can be pressed into a silicone mould and left to dry until it holds the shape.

3. Do I need to grease a silicone mould first?

Usually not. Silicone is naturally flexible and generally releases dried paper or fabric well. Test your particular binder and mould first if you are unsure.

4. How do you make a hollow paper mâché shape?

Make two thin matching halves in the same mould, dry them completely and join the edges. This produces a three-dimensional shape without a heavy solid centre.

5. What silicone mould shapes work best?

Shallow leaves, stars, moons, shells, pebbles and simple abstract forms are easiest. Deep shapes and strong undercuts can be harder to release cleanly.