ISM | Sapphire | Level 8 Security | 120 Minute Fire Protection
Actual products may vary slightly from images shown due to lighting conditions, screen settings, or minor manufacturing updates. When multiple options are available—such as size, color, hardware, or lock type—the images may not reflect every configuration. Please refer to the product description for available options. If you have questions about a specific product's appearance, contact our team before purchasing.

ISM - Sapphire Series

$4,964.00
Stocking ItemWe stock this — Quick Delivery

Choose Your Size:

BU251816: 31.25″×24.25″×27.25″ (H×W×D)
BU251816: 31.25″×24.25″×27.25″ (H×W×D)
BU352120: 41.25″×27.25″×31.25″
BU352120: 41.25″×27.25″×31.25″
BU352420: 41.25″×30.25″×31.25″
BU352420: 41.25″×30.25″×31.25″
BU452120: 51.25″×27.25″×31.25″
BU452120: 51.25″×27.25″×31.25″
BU452420: 51.25″×30.25″×31.25″
BU452420: 51.25″×30.25″×31.25″
BU552120: 61.25″×27.25″×31.25″
BU552120: 61.25″×27.25″×31.25″
BU552420: 61.25″×30.25″×31.25″
BU552420: 61.25″×30.25″×31.25″
BU602120: 66.25″×27.25″×31.25″
BU602120: 66.25″×27.25″×31.25″
BU602124: 66.25″×27.25″×35.25″
BU602124: 66.25″×27.25″×35.25″
BU652818: 71.25″×34.25″×29.25″
BU652818: 71.25″×34.25″×29.25″
BU723626: 78.25″×42.25″×37.25″
BU723626: 78.25″×42.25″×37.25″
Selected None selected

Key Features

Protection Level Maximum Protection
Security Level 9
Fire Rating 120 min at 1850°F
Capacity Up to 0 guns
Weight 930 lbs
Made in USA No
Warranty Limited Life-Time
ISM | Sapphire | Level 8 Security | 120 Minute Fire Protection

ISM - Sapphire Series

BU251816: 31.25″×24.25″×27.25″ (H×W×D)

Current Price $4,964.00
If an unrated safe no longer answers the question you are asking, the Sapphire is where certified protection starts. Its body and door combine outer and inner steel plates around a monolithic casting of specialized concrete blended with ISM's anti-penetration composite, and the door adds a patented alloy grid that fights drilling and cutting. This sits in the middle of ISM's UL listed range, above the entry tool-resistant models and below the six-sided and torch rated ones. What you are buying is a number an outside laboratory signed off on, which is the only kind of security claim you can actually check.

Who This Safe Is Best For — and When to Consider More

Choose this model if:

Choose the Sapphire if you want an attack rating an outside laboratory verified, if the contents would be genuinely painful to lose, and if your space can take the weight. It is the right call when your insurer has asked what rating your safe carries, or when you have already been through a break-in and do not intend to repeat it. It is also right if you want certified resistance without stepping into six-sided or torch rated construction and the cost that comes with it.

Best For:

Choose the Sapphire if you are protecting cash, jewelry, records or collections that would be difficult to replace, and your insurer or your own judgment has raised the question of a certified rating. It fits you if you want the attack rating verified rather than asserted, and if your space can accommodate a safe that starts at 1,230 pounds. We see it chosen by business owners who moved past a burglary rated box after an incident, and by homeowners whose contents outgrew the safe holding them.

Not Ideal For:

The Sapphire is not the right answer if your concern is mostly fire rather than forced entry, since lighter and less expensive safes carry longer fire ratings. It is also not right if your floor, your access route or your budget cannot take a unit in the 1,230 to 4,710 pound range. If you need certified resistance on all six sides rather than the door face, the next model up is where that lives.

What Makes the Sapphire Different

The Sapphire uses a UL listed combination lock, mechanical or digital depending on how you specify it, plus a UL listed high security key lock as the second of two locks. Both drive three-way active boltwork through a double-action mechanism, so bolts extend into three sides of the frame rather than one. Glass plate relocking protection sits behind every lock, which means an attempt to punch or drill the lock releases independent relockers that hold the bolts closed even after the lock itself is destroyed. If you are weighing mechanical against digital, start with how often you will actually open it.
The body and door are a multi-layered structure: an outer steel plate, an inner steel plate, and between them a monolithic casting of specialized concrete mixed with ISM's anti-penetration composite. No steel gauge is given for either plate, so we will not quote one. What the published construction does tell you is that resistance here comes from the composite mass rather than plate thickness alone, which is why the Sapphire weighs what it does. Set it beside a heavy uncertified safe and the material between the plates is the difference you are paying for.
ISM builds the Sapphire around a monolithic casting rather than a filled cavity, so the body is cast as one continuous mass instead of assembled from layers that can be separated under attack. Inside that casting sits a patented anti-penetration composite that dulls drill bits and loads cutting wheels. The door adds a patented alloy grid over the same composite. That combination is what turns a thirty minute attack into an unfinished one, because every tool has to fight a material that fights back rather than one that is simply thick.
ISM | Sapphire | Level 8 Security | 120 Minute Fire Protection open view
The interior runs on adjustable removable shelves, one in the smallest sizes and up to four in the largest, with interior volume given for every size from 4.2 to 39.0 cubic feet. An optional connection hole lets you tie the safe into a monitored alarm system. No firearm capacity is given for this model and we will not estimate one, because the Sapphire is built around cash, documents and valuables rather than long guns. Bring us your actual contents and we will lay them out against the shelf spacing before you commit to a size.
Eleven sizes span 31.5 to 78.5 inches tall and 24.5 to 42.5 inches wide, with depths from 27 to 37 inches. Add two inches to the published depth for a three spoke operating handle, or 3.55 inches for a pull handle, because the handle is what usually breaks a tight doorway measurement. Door swing projections are published for every size, and they matter more than most buyers expect once the safe is in the room. We check the swing arc during the pre-delivery review rather than on delivery day.

Security Construction & Burglary Protection

A UL TL-30 listing means an independent laboratory attacked the door with hand tools, power tools and cutting equipment for thirty minutes of working time and failed to open it. Thirty working minutes is longer than it sounds, because the clock runs only while tools are on the safe. The Sapphire earns that on the door face, which is the surface almost every real attack targets. The composite casting is what makes each of those minutes expensive: drills wander, cutting wheels load up, and the alloy grid in the door breaks the bite. What we see in this market is that the safes which get defeated are the ones that were never rated at all.

Highlight

A UL TL-30 listing puts an independent laboratory between the manufacturer's claim and your decision, and the Sapphire earns it through a monolithic composite casting, a patented alloy grid in the door, and glass plate relockers behind both locks.
Learn More

Certified Fire Protection & What It Means

ISM tested the Sapphire in its own furnace and rates it at 2 hours against a 350 degree interior threshold, which is the point at which paper begins to scorch. That is a manufacturer test rather than a third party certification, and the UL listing this safe carries covers burglary only. We tell people to read a factory fire number as a construction indicator, because two safes of similar mass and similar barrier material tend to perform similarly whatever the label says. Where the safe sits in the building shapes the outcome as much as the rating does.

Highlight

ISM rates the Sapphire at 2 hours against a 350 degree interior threshold on the strength of its own furnace testing, which tells you how the barrier is built rather than how any particular fire will behave.
Learn More

Lock Type & Access Options

You get two UL listed locks on the Sapphire: a combination lock, mechanical or digital as you specify, and a high security key lock. Both have to be satisfied to open the door, which is real control when more than one person has access to the room but only one should have access to the contents. Digital suits a safe you open several times a day. Mechanical suits one you open a few times a year and want to stop thinking about.

Highlight

Two locks, adjustable shelving you can respace as the contents change, and an optional alarm connection make the Sapphire practical to live with rather than only secure.
Learn More

Interior Storage, Shelving & Organization

Day to day the Sapphire is a shelved cabinet behind a certified door. Adjustable removable shelves let you set spacing around what you actually store, and you can change that spacing later when the contents change, which they usually do. Interior volume runs from 4.2 to 39.0 cubic feet depending on size, and the figure is given for every variant rather than left for you to work out. If you want the safe on your alarm system, specify the connection hole at order time rather than after installation.
The interior runs on adjustable removable shelves, one in the smallest sizes and up to four in the largest, with interior volume given for every size from 4.2 to 39.0 cubic feet. An optional connection hole lets you tie the safe into a monitored alarm system. No firearm capacity is given for this model and we will not estimate one, because the Sapphire is built around cash, documents and valuables rather than long guns. Bring us your actual contents and we will lay them out against the shelf spacing before you commit to a size.

Installation, Placement & Bolting Down

Installation planning often determines long-term satisfaction. The Sapphire starts at 1,230 pounds and the largest size reaches 4,710, so the questions that decide the day are doorway width, hallway turning radius, and whether the final floor location sits on slab or over a framed span. We ask for photographs and video of the full route before we schedule, because a surprise on delivery day is a planning failure rather than bad luck. Our crews anchor the safe at the placement location and shim the door to a neutral swing before we walk you through the combination.

One of the simplest ways to increase resistance is proper anchoring.

Highlight

Our own crews handle every Sapphire delivery on unmarked trucks with equipment built for this weight range, so the safe arrives without announcing itself to your street.
Two workers guide a shrink-wrapped safe on a skid steer beside a house on a dirt lot

Is This Protection Level Enough for Your Situation?

UL TL-30 Certified Resistance, Verified by an Independent Laboratory

If an unrated safe no longer answers the question you are asking, the Sapphire is where certified protection starts. Its body and door combine outer and inner steel plates around a monolithic casting of specialized concrete blended with ISM's anti-penetration composite, and the door adds a patented alloy grid that fights drilling and cutting. This sits in the middle of ISM's UL listed range, above the entry tool-resistant models and below the six-sided and torch rated ones. What you are buying is a number an outside laboratory signed off on, which is the only kind of security claim you can actually check.
Step Up If:If your concern includes someone having time and privacy to work on the back or sides of the safe rather than just the door, six-sided construction is where that gets addressed. That situation tends to show up when the safe sits in a detached building, a stockroom with after hours access, or anywhere an intruder would not be interrupted. Treat it as a future consideration rather than a correction, because plenty of owners never need it.
More Than Needed If:If what you are protecting is mostly paper and the risk you lie awake over is fire rather than theft, the Sapphire is more safe than the situation calls for. A document rated safe will give you a longer fire rating at a fraction of the weight and the cost. We would rather point you there than sell you thirty certified minutes you will never test.

ISM Sapphire

Technical Specifications

Models: Section 1 - Series Specifications / ISM BU251816 / ISM BU352120 / ISM BU352420 / ISM BU452120 / ISM BU452420 / ISM BU552120 / ISM BU552420 / ISM BU602120 / ISM BU602124 / ISM BU652818 / ISM BU723626

Section 1 - Series Specifications

ISM BU251816 - Small
Exterior Dimensions
31.50H x 24.50W x 27D
Interior Dimensions
25H x 18W x 16D
Weight
1,230 LBS

ISM BU352120 - Small
Exterior Dimensions
41.50H x 27.50W x 31D
Interior Dimensions
35H x 21W x 20D
Weight
1,820 LBS

ISM BU352420 - Medium
Exterior Dimensions
41.50H x 30.50W x 31D
Interior Dimensions
35H x 24W x 20D
Weight
1,940 LBS

ISM BU452120 - Small
Exterior Dimensions
51.50H x 27.50W x 31D
Interior Dimensions
45H x 21W x 20D
Weight
2,160 LBS

ISM BU452420 - Medium
Exterior Dimensions
51.50H x 30.50W x 31D
Interior Dimensions
45H x 24W x 20D
Weight
2,300 LBS

ISM BU552120 - Medium
Exterior Dimensions
61.50H x 27.50W x 31D
Interior Dimensions
55H x 21W x 20D
Weight
2,500 LBS

ISM BU552420 - Medium
Exterior Dimensions
61.50H x 30.50W x 31D
Interior Dimensions
55H x 24W x 20D
Weight
2,660 LBS

ISM BU602120 - Large
Exterior Dimensions
66.50H x 27.50W x 31D
Interior Dimensions
60H x 21W x 20D
Weight
2,670 LBS

ISM BU602124 - Large
Exterior Dimensions
66.50H x 27.50W x 35D
Interior Dimensions
60H x 21W x 24D
Weight
2,910 LBS

ISM BU652818 - X-Large
Exterior Dimensions
71.50H x 34.50W x 29D
Interior Dimensions
65H x 28W x 18D
Weight
3,270 LBS

ISM BU723626 - X-Large
Exterior Dimensions
78.50H x 42.50W x 37D
Interior Dimensions
72H x 36W x 26D
Weight
4,710 LBS

Frequently Asked Questions

What is actually behind a UL TL-30 label?
A UL TL-30 label means an independent lab attacked the door with hand and power tools for thirty working minutes and could not open it. The clock stops when tools stop, so thirty certified minutes outlasts a real burglary attempt. In our experience the label is the only claim you can independently check.
What do you need from me before a safe this heavy shows up?
We need photographs and video of the entire delivery path before we schedule, including every doorway, corner, landing and exterior approach. Eighty percent of a delivery is the preparation, and the Sapphire starts at 1,230 pounds. What gets measured wrong most often is turning radius, not doorway width.
Does adding more steel to a safe get you to a TL rating?
No amount of added steel converts an unrated safe into a TL rated one, because the rating comes from a laboratory attack test rather than from a specification. A safe can be heavier and more expensive than a TL-30 and still carry no listing at all. We see that comparison monthly, and the label settles it every time.
Why does the material between the steel plates matter more than the plate thickness?
The monolithic casting between the steel plates is what defeats drilling and cutting, because it is one continuous mass rather than a stack of separable layers. Concrete blended with an anti-penetration composite dulls bits and loads cutting wheels. What we show people in the showroom is a cutaway, because the material explains itself faster than we can.
Will my insurer care which rating the safe carries?
Insurers and underwriters read burglary ratings as a defined standard, and UL TL-30 is one they recognize by name. An unrated safe, however heavy, gives them nothing to write down. The advice we give is to get the required rating in writing before you choose a size.

Ready to Secure What Matters Most?

Certified fire protection and UL-listed construction for balanced residential storage.

Confirm Availability Speak with a Protection Specialist

Compare Safes

See how this safe stacks up against similar models.

Current Safe

ISM — Sapphire

$4,964.00
Brand
ISM
Model
Sapphire
Protection Level
Maximum Protection
Security Level
9 / 10
Country of Origin
Import
View This Safe