Sealing and Finishing Bones for Long-Term Display
So, you’ve cleaned the bones. Degreased them. Whitened them. And now you’re wondering—how do you seal and finish bones so they stay looking great for years?
Let’s walk through everything you need to know about sealing and finishing bones for long-term display. Whether you a creating a display piece, an art project, or preserving an animal skeleton, my guide has you covered.
Step 1: Make Sure the Bones Are Fully Clean and Dry
Before sealing, the bones must be:
- Completely degreased (no yellow or sticky patches)
- Whitened, if you’re going for that look (optional)
- Fully dry—like, sit-in-the-sun-for-days dry
Why? Because if moisture or oils are left inside, the sealant can trap them in… and you’ll get mould, discolouration, or even rot.
Step 2: Choose the Right Sealant
Here are your best options:
✅ Clear Matte Acrylic Spray
- Easiest to apply
- Keeps bones looking natural
- Available at art or hardware stores
- Dries fast and is non-yellowing
✅ Polyurethane (Water-Based)
- Good for a hard, glossy finish
- Use a brush (thin coats)
- More durable than acrylic sprays
- Avoid oil-based versions—they yellow over time
✅ Paraloid B-72 (for serious collectors)
- Used in museums
- Requires mixing with acetone
- Reversible and stable over decades
- Ideal for fragile bones
Tip: Don’t use Mod Podge or general craft glues. They tend to stay tacky and can attract dust and moisture.
Step 3: Application Tips
- Always apply sealants in a well-ventilated area
- Do light coats rather than one thick coat
- Let each coat dry completely before applying the next
- For a natural finish, use matte—for a shinier look, use satin or gloss
If using a spray:
✅ Hold the can about 20–30 cm away
✅ Start spraying before you reach the bone, and stop after
Optional: Add a Protective Base
If your bone is going on a shelf or display stand, consider adding:
- A felt pad underneath
- A thin clear resin base
- A wooden mount (sealed separately)
This helps avoid scratches, moisture from shelves, and UV damage from direct sunlight.
How Long Does a Sealed Bone Last?
If properly sealed and kept in a dry place, bones can last decades. Just keep them out of:
- Direct sunlight
- Damp areas (like basements or bathrooms)
- Heavy handling
You can gently wipe them with a dry cloth every few months to keep them dust-free.
Final Thoughts
Sealing and finishing bones for long-term display doesn’t have to be hard—but it is the step that separates a good-looking specimen from a great one.
Want more tutorials like this? Check out our full Bone Cleaning Guide and make sure to subscribe for future tips.
