To seal coasters after painting, you will need to apply a clear spray sealer. This sealer will help to protect the painted surface and make the coasters waterproof. Here’s a step-by-step guide on how to do it:
1. Choose a well-ventilated area: Before you begin, make sure you are in a well-ventilated space. This is important as spray sealers can emit fumes that may be harmful if inhaled in an enclosed area.
2. Shake the spray sealer can: Give the can a good shake to mix the contents thoroughly. This will ensure that the sealer is applied evenly.
3. Prepare the coasters: Ensure that the coasters are clean and dry before applying the sealer. Wipe off any dust or debris that may be present on the surface.
4. Apply the first coat: Hold the spray can about 6-8 inches away from the coaster and start spraying. Move your hand in a sweeping motion to cover the entire surface of the coaster. Apply a thin, even coat of sealer. Be careful not to overspray, as it can cause drips or pooling.
5. Let the sealer dry: Allow the first coat of sealer to dry for the recommended time mentioned on the product label. This is usually around 20 minutes, but it may vary depending on the brand.
6. Apply the second coat: Once the first coat is dry, apply a second coat of sealer following the same technique as before. This second coat will provide extra protection and ensure that the coasters are fully sealed.
7. Let the sealer cure: After applying the second coat, leave the coasters to dry and cure completely. The curing time can vary depending on the brand of sealer used, so refer to the product label for specific instructions. It is generally recommended to wait at least 24 hours before using or handling the coasters.
8. Test for waterproofing: Once the sealer has cured, you can perform a waterproofing test. Drip a few drops of water onto the coaster’s surface and observe if the water beads up and rolls off. If the water is absorbed or leaves a mark, you may need to apply an additional coat of sealer.
Remember to read and follow the instructions provided by the manufacturer of the specific spray sealer you are using. Different brands may have slight variations in application techniques and drying times.
Sealing coasters after painting not only protects the artwork but also extends the lifespan of the coasters. It helps to prevent damage from spills, moisture, and general wear and tear. By following these steps, you can ensure that your painted coasters remain vibrant and durable for a long time to come.