How to Preserve & Harden Sand Dollars

Finding a perfect sand dollar is one of those beachcombing moments you want to remember. But once you bring an empty sand dollar home, its delicate structure can make it surprisingly easy to chip, crack, or crumble.

With proper cleaning and preservation, you can strengthen your sand dollars and protect them for coastal décor, crafts, ornaments, gifts, or simply displaying your favorite beach finds.

Here’s how to clean, preserve, and harden sand dollars step by step.

First: Make Sure Your Sand Dollar Isn't Alive

Before taking a sand dollar from the beach, always make sure it is no longer living.

Live sand dollars are often darker—gray, brown, purple, or greenish—and covered with thousands of tiny moving spines that can give them a fuzzy or velvety appearance.

An empty sand dollar test has lost those spines and is typically lighter and smooth.

If it's alive, leave it where you found it.

Gently return living sand dollars to the water so they can continue doing their important job in the coastal ecosystem.

Step 1: Gently Rinse Your Sand Dollars

Begin by rinsing your empty sand dollars with fresh water to remove loose sand and debris.

Avoid scrubbing. Even sand dollars that look sturdy can be extremely fragile, particularly around their edges and natural openings.

Let the water do most of the work.

Step 2: Soak in Fresh Water

Place your sand dollars in a container of fresh water and allow them to soak.

The water may become cloudy or discolored as remaining sand and organic material are released. Replace it with clean water as needed until the water remains relatively clear.

Handle your sand dollars carefully each time you change the water.

Step 3: Whiten Your Sand Dollars — Optional

If you prefer a brighter white appearance, you can use a brief, diluted bleach treatment.

The key word is brief.

Bleach can weaken the natural calcium carbonate structure of a sand dollar. Strong solutions and extended soaking can make an already fragile sand dollar even more brittle.

Use a well-diluted bleach-and-water solution, monitor the sand dollars closely, and remove them as soon as they reach the appearance you want.

You don't need a perfectly white sand dollar for it to be beautiful. Natural variations are part of what makes every beach find unique.

Step 4: Rinse Thoroughly

After cleaning or whitening, rinse your sand dollars thoroughly with fresh water.

If you used bleach, make sure the cleaning solution has been completely removed.

Be particularly gentle at this stage because the sand dollars have not yet been hardened.

Step 5: Let Them Dry Completely

Place your sand dollars flat in a safe location and allow them to air-dry completely.

Don't try to harden a damp sand dollar. Starting with a clean, completely dry specimen will give you the best results.

Step 6: Harden & Protect Your Sand Dollars

This is the step that transforms a delicate beach find into something much easier to display, craft with, and enjoy.

Instead of mixing homemade glue solutions, we recommend Shore Goods Sand Dollar Hardener, created specifically for preserving delicate coastal finds.

Shore Goods Sand Dollar Hardener

As Seen on CBS Sunday Morning

Our Sand Dollar Hardener provides a simple way to strengthen and protect fragile sand dollars while preserving the natural details that make each one unique.

Apply the hardener according to the product directions, making sure your sand dollar is completely clean and dry before beginning.

Once treated and fully cured, your sand dollar will be better protected from the chips, cracks, and crumbling that can happen with untreated specimens.

It's especially useful if you're planning to turn your finds into:

• Coastal ornaments

• Framed shell art

• Shadow boxes

• Wreaths

• Wedding décor

• Beach-inspired crafts

• Keepsakes from your Florida vacation

Can You Harden Sea Urchins, Too?

Empty sea urchin tests are another beautiful beachcombing find—and they're often even more delicate than sand dollars.

First, always confirm that the sea urchin is no longer living. Living sea urchins belong in the water.

Gently rinse an empty test with fresh water and allow it to soak if necessary to remove remaining debris. Avoid scrubbing or putting pressure on its thin walls.

If you choose to whiten it, use extreme caution. Sea urchin tests can become brittle quickly when exposed to harsh cleaning solutions.

Once completely clean and dry, a protective hardening treatment can help strengthen the test for display or crafting.

Work slowly and carefully, especially around the natural openings and delicate details.

How to Store Your Preserved Sand Dollars

Even after hardening, sand dollars are still natural objects and should be handled with care.

For long-term protection:

• Keep them in a dry environment.

• Avoid placing heavy objects on top of them.

• Store loose specimens in padded containers.

• Handle them gently rather than gripping the edges.

• Display special finds in shadow boxes or protected frames.

With proper preservation, the sand dollars you discover on vacation can become keepsakes you enjoy for years.

From Beach Find to Coastal Keepsake

Every sand dollar has a story—the beach where you found it, who you were with, and the excitement of spotting it in the sand.

At Shore Goods, we're inspired by those moments.

Our coastal goods, shelling essentials, locally inspired gifts, and Sand Dollar Hardener are designed for people who love bringing a little piece of the coast home with them.

Ready to protect your favorite finds? Discover Shore Goods Sand Dollar Hardener — As Seen on CBS Sunday Morning — and preserve your beachcombing treasures for years to come.