How to Use Silicone Moulds for Paper Mâché & Fabric Mâché
Updated: Aug 30
Yes — silicone moulds can be used with paper mâché, paper pulp and fabric mâché, but the best method depends on the shape you want to make. For fine detail, build a thin layer or hollow shell against the mould rather than packing a deep mould solid with wet material. This usually dries more evenly, stays lighter and releases more cleanly.
If you are new to the material itself, start with How to Make Paper Mâché: 3 Easy Recipes or compare Paper Pulp vs Paper Mâché before choosing your mould method.
Quick Pick: Which Mould Method Should You Use?
Fine details and shallow moulds: use small pieces of thin paper pressed closely into the surface.
Small solid embellishments: use a fine paper-pulp mixture, but keep the casting as thin as practical.
Soft sculptural shapes: use fabric mâché with lightweight fabric and a suitable water-based stiffening mixture.
Large or deep moulds: make a hollow shell rather than filling the entire cavity with wet pulp.
Why Silicone Moulds Work Well for Paper Mâché
Silicone is flexible, so once a paper-based piece is fully dry you can usually peel or flex the mould away from the casting instead of forcing the finished shape out. That makes it useful for leaves, shells, faces, small ornaments, relief details and lightweight mobile components.
The challenge is moisture. Silicone is non-porous, so the side touching the mould cannot dry through the silicone itself. Thick masses of wet pulp therefore take much longer to dry than thin shells, and demoulding too early can distort the piece.
Method 1: Thin Paper Layers for the Best Detail
For detailed silicone moulds, very small pieces of thin paper can capture the surface better than thick strips. Tissue, single-ply paper or other fine uncoated paper is easier to press into narrow details.
Tear the paper into very small pieces so it can follow the contours of the mould.
Apply a small amount of paste and press the first pieces firmly into corners and fine details.
Build several thin overlapping layers rather than one thick wet layer.
Add a stronger backing layer once the detailed face of the casting is covered.
Let the piece dry completely before gently flexing the silicone away from it.
This approach is especially useful when the visible side of the finished piece needs to copy fine veins, lettering or decorative relief.
Method 2: Paper Pulp in a Silicone Mould
Paper pulp works well for small shapes and raised embellishments because it can be pressed into detail. Use a fine, well-drained pulp rather than a watery mixture, and press it firmly against the mould surface to reduce gaps.
For deeper shapes, avoid filling the whole cavity unless the project genuinely needs to be solid. A thick solid casting traps much more moisture. Creating a shell around the inside of the mould gives you a lighter piece that can dry more reliably.
For a fuller explanation of the material difference, see Paper Pulp vs Paper Mâché.
Method 3: Fabric Mâché in a Silicone Mould
Fabric mâché is useful when you want a slightly softer, textile texture. Thin cotton, muslin or other lightweight absorbent fabric follows mould contours more easily than heavy woven scraps.
Cut the fabric into manageable pieces.
Coat each piece lightly with your chosen water-based stiffening mixture.
Press the fabric into the mould, smoothing out folds and air pockets.
Overlap additional pieces until the shape has enough structure.
Allow the piece to dry thoroughly before demoulding.
For bowls, vessels and free-form fabric projects, see How to Make Fabric Mâché. For hanging shapes, continue with the Fabric Mâché Mobile tutorial.
The Hollow-Shape Hack
For mobiles, ornaments and decorative reliefs, a hollow casting is often more useful than a solid one. Press your paper, pulp or fabric around the inner surface of the mould and leave the centre mostly empty. Once dry, the result is lighter and usually easier to hang.
You can also make two shallow halves and join them after drying if you want a three-dimensional shape without the weight of a solid pulp casting.
Do You Need a Release Agent?
Not always. Flexible silicone often releases dried water-based paper materials without an added release layer, but pastes, mould finishes and silicone formulations vary. Test a small area first. Avoid automatically coating the mould with oil or wax because residues can interfere with later painting or gluing.
Drying and Demoulding Without Distortion
Keep the wet layer as even as possible.
Avoid thick pockets of pulp in deep corners.
Give the exposed side plenty of airflow.
Do not use high oven heat to rush drying; rapid heat can warp paper-based castings and may exceed the mould manufacturer’s recommendations.
Demould only when the piece feels firm and dry, then allow extra air-drying if the mould-facing side still feels cool or damp.
If the piece pulls, stretches or bends as you flex the mould, it probably needs more drying time.
Cleaning and Reusing Silicone Craft Moulds
Remove water-based paste residue before it hardens and follow the mould manufacturer’s cleaning instructions. Avoid abrasive tools that can damage fine surface detail.
If a silicone mould has been used with craft glue, paint, varnish or other non-food materials, keep it as a craft mould rather than returning it to food use.
What Can You Make?
botanical relief tiles and wall pieces
small ornaments and hanging decorations
lightweight mobile components
raised details for bowls and vessels
shells, leaves, stars and geometric shapes
small fabric mâché forms and sculptural embellishments
Once your casting is dry, use the techniques in How to Decorate Paper Mâché for paint, gold leaf, decoupage, washes and other finishes. If you want to work on a larger curved form instead of a small mould, try the Paper Mâché Bowls tutorial.
Frequently Asked Questions
1. Can you use paper mâché in silicone moulds?
Yes. Thin paper layers and fine paper pulp can both work in silicone moulds. Shallow or hollow castings are usually easier to dry than thick solid ones.
2. What type of paper works best for detailed moulds?
Thin, flexible, uncoated paper is easiest to press into fine details. Small pieces of tissue or single-ply paper can be useful for the first surface layer, followed by stronger backing layers.
3. Do I need to grease a silicone mould for paper mâché?
Often no, but it depends on the mould and paste. Test first rather than adding oil automatically, as oily residue can make later painting and gluing more difficult.
4. Why is my paper pulp still wet inside the mould?
Silicone is non-porous, so moisture can only escape through the exposed surface. Thick pulp therefore dries slowly. A thinner or hollow casting improves airflow and shortens the distance moisture has to travel.
5. Can I use a silicone baking mould for crafts and then use it for food again?
It is better to dedicate moulds used with craft glue, paint or sealers to craft use. Keep separate moulds for food and craft projects.
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