How Many Caulks does it take to stop a Bullet?

Published on September 30, 2025
Duration: 22:17

This video demonstrates a series of ballistic tests to determine the effectiveness of common household caulk in stopping various firearm projectiles. The experiment uses multiple firearms, including a .22 LR rifle, 9mm pistols, a .357 Magnum revolver, an AK-47, and an 8mm Mauser rifle, firing different types of ammunition at barriers constructed from caulk tubes. The results show varying degrees of penetration, with more powerful rounds easily passing through multiple tubes, while some success is noted with smaller caliber rounds.

Quick Summary

Household caulk offers very limited ballistic protection. While multiple layers might stop a low-velocity .22 LR, common handgun and rifle rounds like 9mm, .357 Magnum, AK-47, and 8mm Mauser easily penetrate numerous caulk tubes. The material does not significantly adhere to or deform bullets, allowing them to pass through with minimal energy loss.

Chapters

  1. 00:00Introduction to Caulk Ballistics Test
  2. 00:12What is Caulk?
  3. 01:31Testing .22 LR Against Caulk
  4. 03:53Testing 9mm Against Caulk
  5. 06:43Testing .38 Super Against Caulk
  6. 11:11Testing .357 Magnum Against Caulk
  7. 14:51Testing AK-47 Against Caulk
  8. 17:47Testing 8mm Mauser Against Caulk
  9. 20:45Conclusion: Caulk's Bullet Stopping Power

Frequently Asked Questions

Can household caulk stop a bullet?

Household caulk, particularly silicone-based, offers minimal resistance to most firearm projectiles. While multiple layers might slow down or stop very low-velocity rounds like a .22 LR, higher caliber rounds such as 9mm, .357 Magnum, AK-47, and 8mm Mauser will easily penetrate numerous caulk tubes.

How many caulk tubes does it take to stop a 9mm bullet?

Based on the tests conducted, it took approximately 7 to 8 caulk tubes to stop a 9mm bullet. The bullets often passed through cleanly without significant adhesion to the caulk material.

What is the effectiveness of caulk as a ballistic shield?

Caulk is not an effective ballistic shield against most firearms. While it might offer some minimal resistance to very low-powered rounds, it is easily penetrated by common handgun and rifle calibers. It should not be relied upon for protection in a shooting scenario.

Which firearms were tested against caulk barriers?

The video tested various firearms including a .22 LR rifle, a 9mm pistol, a Nighthawk Custom .38 Super pistol, a Rhino 60DS .357 Magnum revolver, an AK-47, and an 8mm Mauser rifle. Different types of ammunition were used for each.

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