How to make fabric stay in a molded shape ?

Mod podge is a good product to try.

here is info Kathleen

https://blog.treasurie.com/how-to-stiffen-fabric/#:~:text=A%20really%20stiff%20and%20permanent,and%20sprayed%20over%20your%20fabric.

How to Stiffen Fabric: DIY Methods

1. Wood glue: Make your own solution by mixing 1 tablespoon to 1 cup of water and brush on where necessary. Mold your fabric to shape and dry. If you require a stiffer finish you may increase the amount of glue substantially. A really stiff and permanent result can be achieved with equal parts of glue and water.
2. Starch and cornflour: Mix 1 tablespoon of starch and 2 cups of water. Mix well and remove all lumps. This solution can be put in a spray bottle and sprayed over your fabric. Once again test your solution and add more starch if needed.
3. Gelatine: This works well with chiffons and silky fabrics where you need gentle non-permanent stiffening. Take 1 teaspoon of gelatine to 2 cups of tap water and leave to settle for 30 minutes. Add 4 cups of hot water to complete the mixture. Dip whole pieces of fabric into the solution and hang out to dry. The fabric will now be stiffer and easier to work and then on completion of the project, the stiffening can be rinsed out and the fabric returned to normal.

Credit to https://blog.treasurie.com/how-to-stiffen-fabric/#:~:text=A%20really%20stiff%20and%20permanent,and%20sprayed%20over%20your%20fabric.

Hello. I like Modge Podge for all my decoupage sealing stiffing and other crafting needs It comes in several sheens gloss matte and satin, and application finishes to include fabric, outdoor, glitter,dishwasher safe, pearl and more!

https://plaidonline.com/products/brand/modpodge?count=80

https://modpodgerocksblog.com/learn-how-to-mod-podge/

Here's some methods:

https://www.ehow.com/info_12025850_ways-stiffen-fabric.html

How to Make Fabric Stiff Permanently

https://www.hunker.com/13422454/how-to-make-fabric-stiff-permanently

https://www.hunker.com/13422454/how-to-make-fabric-stiff-permanently This may help. I also agree with using mod podge.

It depends on what you're trying to do. Mod Podge is a great choice, but I've also see fabric dipped in concrete and dried into shapes.

Mod Podge is probably your best bet, depending on what your goals are for the final result.

Hi Kathleen, here are three ways to achieve this,

https://craftingagreenworld.com/articles/diy-natural-fabric-stiffeners/#:~:text=Cornstarch%20Natural%20Fabric%20Stiffener&text=Dissolve%201%20Tbsp%20of%20cornstarch,to%20room%20temperature%20before%20using.

The degree to which fabric will stay in a particular moulded shape also depends on the thickness of the fabric, and what the fibre content is.

Posting a picture of your piece of fabric and telling us a little more about what the goal of the project is would be helpful.