Fireproof & Document Safes · SentrySafe
SentrySafe HD4100
2.9/5 Best Safe Score (how we score)
My pick for raw comics in a flood-prone home: a file box UL Classified for 1/2 hour at 1550°F and ETL Verified for 72 hours of flooding, with room for about 48 raw books standing.
$68.00 Price as of Nov 7, 2026, 7:59 PM UTC In Stock
Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.
You buy on Amazon; stock and delivery are shown there. As an Amazon Associate we earn from qualifying purchases. We research products from maker pages and owner reports; we have not tested this one ourselves.
Who it's for
- Best waterproof file safe for raw comics in Best Safe for Comic Books – 5 Picks Checked for CGC Slab Fit: Collectors with raw keys in bags and boards who worry about water; a CGC slab does not fit, and the key lock is privacy protection only.
- Best budget alternative in Best Fireproof File Cabinet for Home – 5 Picks by Filing Space: Renters, upstairs rooms and anyone with a few dozen folders; it is light enough to carry off, so it protects against fire and water, not theft.
- Best fire and flood box for jewelry and papers in Best Safe for Watches and Jewelry – 5 Picks by Collection Size: Owners in basements or flood zones who store papers with jewelry. The key latch is privacy only, so put it inside a closet or bigger safe.
- Best office safe for hanging files in Best Safe for Small Business Office – 6 Picks for Cash and Files: Offices in a flood zone or a ground-floor unit that keep letter files; the key lock only keeps out curious hands, so it is not cash storage.
- Best file box for papers in Best Home Safe Under $500 – 10 Picks Sorted by Fire, Theft and Guns: Renters and homeowners with letter-size files who want flood protection on top of a 30-minute UL fire rating; the key lock only keeps out curious hands.
- Best for documents and leaks in Best Safe for an Apartment – 7 Picks Renters Can Move and Secure: Renters worried about a leak or sprinklers from the unit above who keep passports, a lease and birth certificates; the key lock only stops curious hands, so keep it out of sight.
- Best waterproof file box in Best Fireproof Document Safe – 5 UL-Rated Picks Compared: Renters and homeowners who keep letter-size files and want flood protection on top of a 30-minute UL fire rating; the key lock only keeps out curious hands.
What we like
- ETL Verified against flood damage for up to 72 hours
- UL Classified for 1/2 hour at up to 1550°F (843°C)
- 11.5 inch interior height lets raw comics stand like files
- UL Classified 30 minutes at 1,550°F; ETL 72-hour water rating
- About 39 lb, sold and shipped by Amazon
- Fits letter or legal hanging folders
What to know first
- Slabs miss: 8.1 inch depth and 12 inch width are just under a slab
- Owners report a plastic closing latch and a key that snapped in the lock
- Plastic closing latch and a basic key; owners report a snapped key
- No handles and only 0.65 cu ft inside
- Key latch, not a security lock
Product details
| Brand | SentrySafe |
|---|---|
| Manufacturer | SentrySafe |
| Model | HD4100 |
| Part number | HD4100 |
| Dimensions (L x W x H) | 13.5 inches x 15.5 inches x 14.3 inches |
| Item weight | 38.8 pounds |
| Color | black |
| Size | 0.65 Cubic Feet |
| Warranty | One year limited warranty |
| Lock | Key lock (two keys) |
| Fire rating | UL Classified, 1/2 hour at 1550°F (843°C) |
| Water rating | ETL Verified, flood damage up to 72 hours |
| Exterior | 14.3 H x 15.5 W x 13.5 D in |
| Interior | 11.5 H x 12 W x 8.1 D in |
| Capacity | 0.65 cu ft |
| Weight | About 39 lb |
| Raw comics (my math) | About 48 standing |
Top rows from the Amazon listing; the rest from the maker pages we checked.
About this item
- FIRE AND FLOOD PROTECTION FOR ESSENTIAL PAPERS: UL Classified to withstand high temperatures for up to thirty minutes and ETL Verified to protect contents during water exposure, helping safeguard critical paperwork during common home emergencies
- DESIGNED FOR IMPORTANT DOCUMENT STORAGE: Spacious interior fits hanging file folders and is ideal for organizing passports, birth certificates, insurance records, and legal paperwork
- KEY LOCK SECURITY YOU CONTROL: Durable key lock helps prevent unauthorized access and keeps the lid securely closed during fire events. Two keys are included for backup access
- HOME FRIENDLY SIZE WITH PORTABLE DESIGN: Compact footprint fits easily in closets, offices, or under desks while remaining portable enough to relocate when needed
- BUILT FOR EVERYDAY PEACE OF MIND: Black exterior offers a clean, neutral look that blends into home or office spaces while providing dependable document protection year round
From the product's Amazon listing, as of Nov 7, 2026, 7:59 PM UTC. The seller writes this text, not us, and Amazon may change it.
What owners say
Summarized from 4 owner discussions and review pages we read.
Praise
- Well built and secure for papers
- Fire and water protection that fits owners' needs
- Well built and easy to lock
- Hanging files keep documents organized
- Well built, heavy and easy to use
- Hanging-file storage keeps papers organized
Complaints
- A plastic closing latch that feels cheap
- A key that snapped in the lock, and a heavy box to carry
- The closing latch is plastic
- Heavy with no handles; one owner had a key snap in the lock
- The closing latch is plastic and feels easy to force
- A key snapped off in the lock for one owner
Sources: SentrySafe owner reviews: HD4100 · Walmart customer reviews: SentrySafe HD4100 · Walmart customer reviews: SentrySafe HD4100 Charcoal Gray · ShopSavvy review summary: SentrySafe HD4100
Guides that include it
- Best Safe for Comic Books – 5 Picks Checked for CGC Slab Fit
- Best Fireproof File Cabinet for Home – 5 Picks by Filing Space
- Best Safe for Watches and Jewelry – 5 Picks by Collection Size
- Best Safe for Small Business Office – 6 Picks for Cash and Files
- Best Home Safe Under $500 – 10 Picks Sorted by Fire, Theft and Guns
- Best Safe for an Apartment – 7 Picks Renters Can Move and Secure
- Best Fireproof Document Safe – 5 UL-Rated Picks Compared
Similar fireproof & document safes
-
First Alert 2087F
$295.95
-
SentrySafe SFW123DSB
$224.99
-
SentrySafe SFW205CWB
$397.99
-
SentrySafe CHW20221
$130.99
