Is Oobleck Bulletproof?

Published on July 26, 2025
Duration: 9:48

This video tests the bulletproof capabilities of Oobleck, a non-Newtonian fluid, against various firearm calibers. While Oobleck successfully stopped .22 LR, .380 ACP, and .223 rounds, it was penetrated by .45 ACP and catastrophically failed against a .50 BMG. The experiment also demonstrated Oobleck's effectiveness against blunt force but its vulnerability to sustained pressure.

Quick Summary

Oobleck, a non-Newtonian fluid, can stop smaller caliber bullets like .22 LR, .380 ACP, and .223 Remington due to its ability to solidify under impact. However, it failed to stop larger rounds like .45 ACP and was completely destroyed by a .50 BMG.

Chapters

  1. 00:00Intro: What is Oobleck?
  2. 01:37.22 LR and .380 ACP Bullet Test
  3. 03:46.45 ACP and Blunt Force Tests
  4. 05:44.223 AR-15 and .50 BMG Catastrophe
  5. 07:56Conclusion & Merch

Frequently Asked Questions

Can Oobleck stop bullets?

Oobleck, a non-Newtonian fluid, can stop smaller caliber bullets like .22 LR, .380 ACP, and .223 Remington due to its ability to solidify under impact. However, it failed to stop larger rounds like .45 ACP and was completely destroyed by a .50 BMG.

What happens when you shoot Oobleck?

When Oobleck is shot, its non-Newtonian properties cause it to momentarily solidify around the projectile, absorbing and dissipating energy. Smaller rounds are stopped, while larger, higher-energy rounds can penetrate or even shatter the Oobleck mass and its container.

What is Oobleck made of and how does it work?

Oobleck is a simple mixture of cornstarch and water. It exhibits shear-thickening behavior: it flows like a liquid when handled gently but becomes rigid and solid-like when subjected to sudden force or impact, like a bullet strike.

Which firearms were tested against Oobleck?

The test included a Ruger 10/22 (.22 LR), a Ruger Security 380 (.380 ACP), a 1911 style pistol (.45 ACP), an AR-15 (.223 Remington), and a .50 BMG sniper rifle. Blunt force tests also used a mallet, baseball bat, and arrow.

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