SentrySafe HD4100 Fireproof & Waterproof Document Safe

Last updated date: April 9, 2021

DWYM Score

9.8

SentrySafe HD4100 Fireproof & Waterproof Document Safe

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We looked at the top Document Safes and dug through the reviews from some of the most popular review sites. Through this analysis, we've determined the best Document Safe you should buy.

Update as April 9, 2021:
Checkout The Best Document Safe for a detailed review of all the top document safes.

Overall Take

This safe boasts an interior area of 12-by-8.1-by-11.5 inches to give you up to 0.65 cubic feet of file storage. It's rated for a half an hour of fire exposure up to 1550°F and up to 72 hours of water submersion. The flat key lock will keep the lid in place even with exposure to extreme heat.


In our analysis of 12 expert reviews, the SentrySafe HD4100 Fireproof & Waterproof Document Safe placed 1st when we looked at the top 5 products in the category. For the full ranking, see below.

From The Manufacturer

Fireproof box is UL Classified to endure 1/2 hour at 1550°F to protect irreplaceable documents, small valuables, DVDs, and USBs from fire. Waterproof box is ETL Verified for 72 hours of water submersion offering peace of mind in the event of a flood. Fire safe features a flat key lock to prevent the lid from opening in the event of a fire; Includes 2 keys. Material - Captured Fire Insulation. Document safe features built-in straps for easy storage of passports, social security cards, and birth certificates; Fire box accommodates letter-size hanging files and folders (sold separately). Exterior: 15.5 inch W x 13.5 inch D x 14.3 inch H; Interior: 12 inch W x 8.1 inch H x 11.5 inch H; Medium capacity 0.65 cubic feet; Weighs 39 pounds.

Expert Reviews

Expert Summarized Score

7.3
6 expert reviews

User Summarized Score

8.9
5,258 user reviews

What experts liked

Very roomy, holds hanging files and other documents. Both water and fire resistant. Heavy duty construction, not easily removed by criminals.
- BestReviews
This security box is waterproof, and it has the capacity to withstand the water pressure in case of a flood for 72 hours. It is made of captured fire insulation, and it has a traditional but flat key lock that will prevent the lid from opening in the event of a fire.
- Authority Safes
In terms of waterproofing, it’s also high standard. It’s ETL Verified for 72 hours of water submersion. It also has the 1/2 hour at 1550°F fireproofing, making this safe comparable to other high quality safes on the list.
- Firefighter Garage
The cabinet is large enough to hold many documents and other valuables that need to be protected from fire and water. The seal is tight and prevents water from getting in. The HD4100 safe is ETL verified for water as well as fire resistance. In addition it is UL classified for fire protection (30 minutes of resistance to 1550°F). The safe comes with a one-year warranty and is guaranteed for after-fire replacement.
- Locksmith Advisor
Sentrysafe provides a flat key that includes two keys for strong protection. These features prevent the lid from opening in the event of a fire. And help to keep your valuable items private and secure.
- The Consumer Tips

What experts didn't like

Original keys are not durable, so duplicates recommended. Plastic elements not as fireproof as promoted. Better for document storage than valuable possessions.
- BestReviews
We can’t recommend the SentrySafe HD4100. Even though it has a more solid fit and finish than other safes we’ve tested from the company, the issues we’ve seen are so widespread and serious that we’re reticent to suggest any of SentrySafe’s models.
- The New York Times
One thing that did make us a little weary is that it comes in a a whopping 39 Lbs and has no handles. So, we’re not going to want to be lugging this one around.
- Firefighter Garage
Carrying it actually not so easy because there are no handles to hold on to. Plastic latch may feel cheap and not safe.
- Locksmith Advisor
Not very safe, because of lightweight, anyone can steal the box easily.
- The Consumer Tips

An Overview On Document Safes

If your home suffered a break-in, fire or flood, what items would you miss most? Your furniture and electronics can be replaced, but what about the many priceless items you own? If you suffer a home loss, you’ll probably care most about things like family photos, birth and marriage certificates and jewelry.

A good safe can help protect those precious items. You can store your valuables inside and lock it, keeping them protected from others in the household or intruders. Some safes come with keypads that let you input a code for entry, while others use key-based locks. Either way, make sure the door can’t be pried open by someone who’s really determined to get in.

If you want to protect against fire and flood, though, you need to look for a safe that’s rated to withstand those extremes. There’s a limit to how long any safe can hold up against extreme temperatures or moisture. Safes will be rated to handle up to a certain temperature for a maximum time limit and/or immersion in water up to a certain level for a specific amount of time. That means if your home does go through such an unexpected disaster, you’ll need to get the documents to safety as soon as you can.

The Document Safe Buying Guide

  • Document safes come in a variety of sizes. Some are great for storing smaller items like certifications and passports, while others have enough room for hanging file folders filled with documents.
  • Some safes are more lightweight than others and even include a handle for easy carrying. This can make it easier to take it on the go with you.
  • Even if your safe is rated for water protection, you can safeguard against water damage by storing it above floor level. If your home does flood due to a natural disaster or an appliance malfunction, your documents will hopefully be above the water.
  • Some safes can be mounted on a wall. This is a great way to keep your items protected in a closet or other storage area.
  • If you’re storing important items like extra credit cards and passports, a safe with compartments can make it easier to keep things organized.
  • If your safe locks using a key, make sure it comes with a spare. Also have a plan to hide those keys in a place where you can find them. Tell someone you trust exactly where that key can be found in case something happens to you.