fire gun safe insulation material

Stuffed With 2300° Ceramic Wool & Glass Blanket

We put more fire protection in our bodies than any safe manufacturer. 

A REAL Fire Insulator

Currently used in industrial ovens and kilns. Even NASA uses it on their spacecraft. We build every fire-lined safe with the exact same insulation used in industrial ovens and kilns which are designed to handle over 2,300°F of relentless heat. These materials don't just "slow down" heat, they block it.

Durability

Won't Deteriorate

It can go through a fire, and another fire, and another... It holds its shape and fire resistance strength even after being exposed to extreme temperatures.

Construction

Fine Details

Application changes depending on where it's going.

  • Each right, left, and back wall, along with the door jambs, is packed with 2.5" of 2300°F-rated, 8 lb. density ceramic wool, compressed to 2¼ inches
  • The top and bottom walls will have 2.5" of ceramic insulator and 2" of glass blanket, compressed to 4"
  • The door will have 2.5" of ceramic insulator and 1" glass blanket, compressed to 3"

Coverage

We Don't Skimp Out

That's a lot of insulation. Sturdy gives you more of this premium ceramic and glass insulation than most manufacturers. Thicker layers, denser coverage, and complete protection from top to bottom. While others cut corners to save costs, we pack in every inch of heat-blocking material your safe can hold without weak spots. Every inch of your safe — walls, door, top, and bottom — is packed with perfectly compressed insulation that won't shift, sag, or leave gaps over time.

Interior

16g Inside Steel Liner

Does more than hold ceramic in. A rugged 16-gauge steel interior liner helps compress and cover the insulation material. It also adds more strength, so your shelves won't buckle under pressure like others anchoring shelving into drywall and thin felt. You can also do things such as add magnet storage systems inside and decorative vinyl stickers.

Watch the Magic Happen: See How It's Applied.

Tight Seal Right From The Start

The weakest point on most fire safes is the door seal. If heat and smoke slip through that tiny gap, everything inside is at risk. That’s why we use the same sealing technology trusted in industrial ovens and kilns. Places built to handle extreme, nonstop heat. Every Sturdy Gun Safe with fire lining features a UL-tested fire caulking and a precision-fit boiler gasket, not the cheap, one-size-fits-all gaskets most safes use.

Here’s what makes ours different:

  • Real fire defense: Our LCI Firestop Sealant can block fire, smoke, and moisture for up to 3 hours, and when temperatures rise, it expands up to eight times its size to form a complete seal.
  • More coverage = more protection: Our boiler gasket is twice as wide as the average competitor’s, giving you 2× the sealing power where it matters most, around the door.
  • Custom-fit seal: No two safes have exactly the same door clearance, so we custom-fit every gasket for a perfect seal right from the start. Competitors often use Palusol gaskets, which only expand after they get hot.

Watch a video on how they are applied.

What's Our Fire Rating?

We don't advertise a "fire rating" like a lot of other safe companies do and that's on purpose. We refuse to mislead our customers with numbers that don't actually mean anything in the real world. Our competitors either use made-up fire ratings or incomplete tests that skip key steps, such as including the excessively long cool down time where items are still cooking! Right now, there are no long-gun RSC safes on the market with a true UL fire rating. A UL security rating, which tells you how hard it is to break into a safe, does not mean the safe is fireproof either.

 Truth About Ratings

1st House Fire Survival Video

2nd House Fire Survival Video

Competitors' Insulators

Fire Board

Regardless of their fire ratings, they won’t perform as claimed. One must understand how safe manufacturers test safes for fire to understand how testing facilities come up with those inaccurate fire ratings. UL will tell you not to bother testing safes for fire resistance lined with fire board. Read more about Fire Board being a terrible gun safe insulator.

 It's Terrible