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Key takeaways
- Buy a protector cut for your exact model. A universal film that almost fits will lift at the edges and trap water.
- Official manufacturer kits, such as Shearwater's Perdix/Petrel and Teric protectors, are the safest bet for fit.
- Tempered glass resists impacts and scratches better. Thin film and hydrogel are easier to fit on curved or recessed screens.
- Fit protectors at home, in a clean room, on a dry screen. Dust under the film is the most common failure.
- Replace a protector once it's scratched, cloudy or lifting. It's a consumable, and the screen beneath is not.
The quick answer
If your computer's maker sells an official protector, buy that first. Shearwater, for example, sells a die-cut Perdix/Petrel Screen Protector Kit and a Teric screen protector on its own store and through dealers. For Garmin Descent, Suunto and other watch-style computers, well-reviewed third-party tempered-glass or film protectors cut for the exact model are the practical choice. Add a silicone bumper if you dive rocky shore entries or wrecks, where the bezel takes as many knocks as the screen.
This guide is about protecting the screen. For everyday care, see our dive computer battery care and storage guide and our home rinse and dry station setup.
Why protect a dive computer screen
Dive computers take a beating. They scrape against boat ladders, rocks, wreck metal and tank valves. Sand in a rinse tank acts like sandpaper. Over a few seasons, many screens pick up fine scratches that catch light and make numbers harder to read in low visibility.
Some computers use sapphire or hardened mineral glass that resists scratches well. Others use polycarbonate or standard glass, which scratch more easily. Either way, a protector is cheap insurance, and it keeps the screen clean when you sell or trade in the computer. Our used dive computer buying guide explains why a clean screen matters for resale.
How we picked
We don't lab test screen protectors, and we can't verify scratch or impact claims. These picks focus on fit: protectors sold by the manufacturer, or third-party protectors sold for specific, named models. Always check that the listing names your exact model and generation. Many brands release updated models with slightly different screen sizes.
Protector types compared
| Type | Protection | Fitting difficulty | Clarity | Best for |
|---|---|---|---|---|
| Official die-cut film | Scratch resistance | Easy | High | Models with an official kit |
| Tempered glass | Scratch and impact resistance | Moderate | High | Flat watch-style screens |
| Hydrogel / TPU film | Scratch resistance, self-heals minor marks | Moderate (needs smoothing) | Good | Curved or recessed screens |
| Silicone bumper | Bezel and edge knocks | Easy | Not applicable | Shore, wreck and cave diving |
| Cut-to-fit universal film | Basic scratch resistance | Hard | Varies | Models with no dedicated option |
Best screen protectors by model
Shearwater Perdix/Petrel Screen Protector Kit
$Shearwater's official kit is a peel-and-stick clear film die-cut for the Perdix and Petrel. Because it's made for those models, the fit around the edges is the most reliable option. If you own a Perdix 3, check Shearwater's store for a protector listed for that generation before ordering.
Why we like it
- Official die-cut fit
- Clear film preserves readability
- Easy to replace
Keep in mind
- Film protects against scratches, not heavy impacts
- Confirm generation compatibility
Shearwater Teric screen protector
$Shearwater sells a screen protector made for the Teric's round watch-style screen. It's the simplest way to protect a computer that many divers wear every day, not just on dives.
Why we like it
- Made for the Teric screen
- Suits daily wear
- Low cost
Keep in mind
- Replace when scratched
- Check the listing for how many come in a pack
Tempered glass protector for Garmin Descent
$Third-party tempered glass protectors are widely sold for Garmin's Descent watches, usually in multipacks. Glass adds a hard layer against scratches and knocks. Confirm the listing names your exact model and case size, since Descent models come in more than one size.
Why we like it
- Hard glass layer
- Multipacks allow replacements
- Widely available
Keep in mind
- Third-party fit varies by brand
- Adds slight thickness at the edge
Film protector for Suunto D5 and Suunto Ocean
$Third-party film and glass protectors are sold for Suunto's D5 and newer watch-style models. Look for listings that name your exact model. Film often fits better on screens with a raised bezel, since it's thin enough to sit below the bezel edge.
Why we like it
- Thin and clear
- Sits below raised bezels
- Usually sold in multipacks
Keep in mind
- Third-party quality varies
- Check the fit before a trip
Hydrogel protector film
$Hydrogel and TPU films flex to fit curved screens and can recover from light surface marks. They're a good option for watch-style computers where glass won't sit flat. They need careful smoothing during fitting, and some leave a slight texture.
Why we like it
- Flexes to curved screens
- Self-heals minor marks
- Thin profile
Keep in mind
- Harder to fit without bubbles
- Can feel slightly soft
Silicone bumper for dive computers
$A silicone bumper wraps the edges and bezel of a watch-style or puck computer. It protects against knocks and drops, especially during gear handling on boats and shore entries. Choose one made for your model so buttons stay easy to press.
Why we like it
- Protects edges and bezel
- Cushions drops on deck
- Easy to fit
Keep in mind
- Adds bulk
- Can trap sand, so rinse it off
How to fit a dive computer screen protector
A well-fitted protector is nearly invisible. A badly fitted one traps dust, bubbles and water. Take ten minutes and do it right.
- Work in a clean, still room. A bathroom after a hot shower has less airborne dust.
- Clean the screen. Use the included wipe or a lint-free cloth with a little isopropyl alcohol, if the manufacturer's care instructions allow it. Then use a dust-removal sticker.
- Line it up before peeling. Hold the protector over the screen to check the alignment and the direction of any cutouts.
- Peel and place. Peel the backing, then lower one edge first and let it settle across the screen.
- Smooth from the center out. Use a card wrapped in a soft cloth to push air bubbles to the edges.
- Let it cure. Give the adhesive time to set before diving, following the protector's instructions.
How to choose
Match your screen type
Flat screens suit tempered glass. Curved or recessed screens suit film or hydrogel. If your screen is sapphire or hardened glass, a film protector mostly prevents scuffs, and a bumper may help more.
Match your diving
- Boat and resort diving: A thin film is usually enough.
- Shore diving over rocks or beach entries: Add a bumper, and consider glass.
- Wreck, cave and technical diving: Glass plus a bumper, since your computer will hit metal and rock.
- Daily wear: Use a durable glass protector on watch-style computers you wear every day.
Think about readability
A glare-reducing (matte) protector can help in bright sun on the surface, but it can reduce clarity underwater. Most divers prefer clear protectors. If you have trouble reading your computer at depth, a bigger screen may be the real answer. See our best dive computers with large displays.
When to replace a protector
- It's scratched enough to blur numbers.
- It's cloudy, or water has crept under an edge.
- The edges are lifting or collecting sand.
- You're about to sell or trade in the computer.
Remove old protectors slowly, starting at a corner, and clean the screen before fitting a new one.
Mistakes to avoid
- Buying for the wrong generation. Newer models often have different screen sizes. Check the model name and version in the listing.
- Fitting on the boat. Salt spray and wind guarantee dust and bubbles.
- Ignoring the bezel. Screen protectors don't protect edges. Use a bumper if edges take the knocks.
- Leaving sand in the bumper. Rinse the bumper and computer in fresh water after every dive, and take the bumper off occasionally to clean underneath.
- Using strong solvents. Stick to cleaners your manual allows.
Holiday and Black Friday tip
If you're buying a new dive computer on sale this season, add a screen protector and a bumper to the same order. They're small, inexpensive add-ons that protect a large investment from the first dive. Fit the protector before you wrap the gift, or include a note so the recipient fits it before the first dive.
Frequently asked questions
Do dive computers need screen protectors?
They're not required, but they're a cheap way to prevent scratches that make screens harder to read. Computers with sapphire or hardened glass resist scratches better, but even those can benefit from a bumper for edge knocks.
Does Shearwater make screen protectors?
Yes. Shearwater sells a die-cut Perdix/Petrel Screen Protector Kit and a Teric screen protector. Check Shearwater's store for protectors listed for newer models before ordering.
Is tempered glass or film better for a dive computer?
Tempered glass offers better scratch and impact resistance on flat screens. Film and hydrogel are easier to fit on curved or recessed screens and are thinner.
Will a screen protector come off underwater?
A properly fitted protector made for your exact model should stay put. Protectors that don't fit well or were fitted over dust are more likely to lift and let water under the edges.
Can I use a smartwatch screen protector on my dive computer?
Only if it's made for your exact model. Watch-style dive computers such as the Garmin Descent have dedicated third-party protectors, but a generic smartwatch protector usually won't fit.
How often should I replace my screen protector?
Replace it when it's scratched enough to blur the display, cloudy, lifting at the edges, or before you sell the computer.