What Do You Use to Seal Plaster of Paris?

By Robert Palmer

Plaster of Paris is a versatile material that can be used for a variety of art and craft projects. It is made from gypsum, a rock that is commonly found in nature. When mixed with water, plaster of Paris hardens into a durable and smooth surface that is perfect for sculpting, casting, and other creative endeavors.

However, once your project is complete, you may be wondering how to protect it from damage or wear and tear. That’s where sealing comes in. Sealing your plaster of Paris project not only protects it from damage but also enhances its appearance by giving it a glossy or matte finish.

So what do you use to seal plaster of Paris? There are several options to choose from depending on your project’s requirements and personal preference.

1. Varnish:

Varnish is a popular choice for sealing plaster of Paris because it provides a protective coating while enhancing the natural beauty of the material. You can find varnish in gloss, satin, or matte finishes depending on the look you are going for. Simply brush on the varnish with a soft-bristled brush and let it dry according to the manufacturer’s instructions.

2. Polyurethane:

Polyurethane is another effective sealer for plaster of Paris projects. It provides a clear and durable finish that resists scratches and dings. Polyurethane comes in both water-based and oil-based formulas, so make sure to choose the right one for your project.

3. Acrylic Sealer:

Acrylic sealer is an easy-to-use option that dries quickly and provides excellent protection against moisture and dirt buildup. It can be found in both spray-on and brush-on formulas. Again, make sure to choose the right finish for your project’s desired effect.

4. Wax:

Wax offers a natural-looking finish that enhances the color of plaster without altering its texture or appearance too much. It also provides some level of protection against scratches and chipping. However, wax is not as durable as other sealants, so it may need to be reapplied periodically.

In conclusion, sealing plaster of Paris is an important step in preserving and enhancing your project’s appearance. Whether you choose varnish, polyurethane, acrylic sealer, or wax depends on your personal preference and the project’s requirements. Just make sure to follow the manufacturer’s instructions carefully and apply the sealer in a well-ventilated area for best results.