How to Encase Shells in Resin

Make certain there are no prohibitions against removing seashells before collecting them.

There are few things in life as relaxing and pleasurable as undertaking crafting projects---particularly if the project also happens to involve graceful shells evoking thoughts of soothing waves, beachfronts and summer sun. Polyurethane resins are very versatile so you can seal just about anything using one form or another---remembering, of course, that this type of material is true to it's word: your imbedded shell is going to stay put for life when you're done.

Things You'll Need

• Resin compound
• Catalyst
• Shells
• Molds

Instructions

1. Collect seashells from beaches as long as no signage is posted that prohibits you from doing so. Wash the shells in a mild detergent with a sponge to remove salt, sand and refuse. Shake the shells in clear water to get rid of anything lurking within interior channels. Use a blow dryer to reach the innermost channels and give your shells a final inspection before you get to work so you don't inadvertently leave bits of mold inside your shells.

2. Choose the brand of polyurethane resin product that appeals to you. Pick a "pourable" or "spreadable" form---the latter is newer, thicker and offers more control, so it's great for kids. Check out the extra product benefits and features you'll find on the label. Some compounds dry fast. Others take time. One works only with rigid molds while another is fabricated for flexible molds only. If you plan to display your encased seashells in an area that's flooded with sunlight look for brands with UV protection properties as this extra perk can keep your shell's color from fading over time.

3. Purchase one or more resin-friendly molds if you don't already own them. Make sure the style you choose is compatible with the resin you selected. Follow specific mixing and measuring directions found on the package to combine the correct amounts of catalyst and resin. Stir well with a stick. Poke at the mix to add a couple of air bubbles. Fill half of the mold with the mixed resin compound.

4. Allow the resin-filled mold to set up for at least half an hour unless package directions specify longer or shorter curing times. Test the resin with a stick to see if it's reached the consistency of gelatin. Place the shell(s) into the mold, positioning it in the right direction. Mix a new batch of resin and catalyst following package instructions--most formulas call for different amounts of resin and catalyst in second and successive layers so don't ignore these measurements.

5. Allow your encased shell(s) to harden up to 24 hours. Remove it from it's mold---this could be a struggle if you're using a non-flexible type of mold, but keep tugging as it will come out. Use fine sandpaper to remove blobs or slivers of hardened excess resin from the piece. Polish up your encased shell art with a buffing compound and clean, soft cloth. Make it sparkle by buffing it with a soft brush on a buffing wheel.

6. Clean your mold(s) carefully. Previously used molds have a tendency to attract imperceptible scratches in the walls of both rigid and flexible molds if the user isn't careful during the mold-cleaning process. Those scars could wind up in your next resin encased shell, so it's worth a close inspection before you get going on your next project.

References

• EnvironMolds: Types of Resin Casting Materials
• Family Education: Cast Treasure in Plastic Resin
• Bedrooms and Bathrooms: Seashell Decorating Ideas