Carving Foam Into Stone With a Hot Knife

I wanted to build a realistic Easter tomb… out of foam. It turned into a journey of burning plastic, and a crash course in sculpting techniques with bonus tips I picked up from Mardi Gras float builders.

In this video, you’ll see:

The tools and tricks I used to shape insulation foam into a massive tombstone-like rock

Why a bent hot knife blade completely changed my approach

How I glued, carved, coated, and painted the foam to get a natural look

The painful lesson I learned (literally) about handling melted foam. Using techniques like washes, heat texturing, and weatherproof coating

The final reveal in its setting, complete with me dressed as a Roman soldier

This project pushed me past my comfort zone with foam sculpting. If you’ve ever wondered how far you can take DIY foam builds, this is a great starting point.

👉 If you enjoyed this build, don’t miss my DIY Disney tombstones video
where I used a Dremel and stencil to carve Haunted Mansion–style gravestones.

Jazz Catan:    • I made a GIANT CATAN Board!!  
Foam at work:    • Watch an Eagle Come to Life: Carving with ...  

Hot knife I used: https://www.amazon.com/dp/B0D47BTJBH?...