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Description
Why the Waterproof iPhone 8 Plus Case in Black Is Essential for Boaters and Beach Families
The iPhone 8 Plus has the big 5.5-inch screen everyone wants at the lake — and the big price tag nobody wants at the bottom of it. The Waterproof iPhone 8 Plus Case in Black settles the argument. It seals your iPhone 8 Plus (2017, 5.5-inch Retina HD display) inside an IP68-certified, 7-layer shell with a rigid polycarbonate frame, a flexible TPU gasket, and a built-in HD scratch-resistant screen guard, fully submersible to 6.6 ft / 2 m for 30 minutes. Waterproof, dustproof, snowproof, dropproof, and shockproof — it is built for boaters, beach families, landscapers, ski-trip packers, and anyone who refuses to leave the big phone behind when the forecast turns. This is the best iPhone 8 Plus waterproof case for taking the Plus-sized screen everywhere it was never supposed to go. Welcome to the Gorilla Family.
Key Features
- Matte black finish: a low-glare black shell that shrugs off scuffs and looks as right in a meeting as on a boat deck.
- Premium materials: rigid polycarbonate front and back frames, a compressing TPU perimeter gasket, and an optical-grade screen membrane.
- Case type: full-body, two-piece sealed waterproof case with a snap-lock closure that wraps the entire phone.
- IP68 waterproof rating: fully submersible to 6.6 ft / 2 m for 30 minutes — great for swimming, snorkeling, and dockside fumbles.
- Snowproof and dirtproof: sealed against powder, ice, dust, and sand, meeting or exceeding IP68 ingress protection.
- 7-layer drop protection: absorbs drops from 6.6 ft / 2 m onto hard surfaces with shock-spreading corners around the big chassis.
- Built-in screen protection: an HD clear, scratch-resistant guard is sealed over the 5.5-inch display — no separate protector needed or allowed.
- Camera protection: a sealed crystal-clear window covers the dual 12 MP cameras, keeping portrait-mode shots sharp above and below the waterline.
- Charging compatibility: the gasketed port fits Apple Lightning cables and narrow MFi connectors; the iPhone 8 Plus's Qi wireless charging works on most pads through the slim back, but this is not a magnetic case and does not add MagSafe.
- Aligned mute toggle: a case-side switch operates the iPhone's silent slider without breaking the seal.
- Compatibility: fits the Apple iPhone 8 Plus (2017, 5.5-inch) ONLY. It does NOT fit the iPhone 8, iPhone 7 Plus, iPhone 7, iPhone 6s Plus, or iPhone X.
Materials Explained — What Polycarbonate and TPU Actually Feel Like
The exoskeleton is polycarbonate — the same impact-resistant plastic found in bike helmets and aircraft cockpit windows. On a phone this size, rigidity matters: the frame keeps the seal compressed evenly across the Plus's wide back so there is no weak corner for water to negotiate with.
The gasket running the perimeter is TPU, the flexible workhorse material of running shoe soles and hockey puck rims. Snap the halves together and it compresses like a dry-bag roll-top — firm, even, and watertight.
The front membrane is optical-grade film that doubles as a permanent screen protector, so the 5.5-inch Retina display stays scratch-free without losing touch response. Altogether the case weighs about 2.7 oz (77 g) and adds roughly 3 mm of thickness — modest numbers for a case that turns the biggest classic iPhone into a poolside camera rig.
Browse More iPhone 8 Plus Cases
Want a wallet, slim, or heavy-duty option for dry season? Explore the full iPhone 8 Plus cases collection, shop now and find the right protective phone case for your lifestyle.
Real-World Use Cases
- The Boater: navigates from the helm in spray and rain, and the one overboard fumble of the summer ends with a laugh instead of a loss.
- The Beach Parent: shoots boogie-board videos waist-deep, hands the phone over with sunscreen fingers, and rinses everything off at the showers.
- The Landscaper: sprinklers, fertilizer dust, and a drop off the trailer gate — the sealed shell hoses clean with the equipment.
- The Ski-Trip Packer: films runs in falling snow at the resort, where the snowproof seal cares nothing for powder in the pocket.
- The Gift-Giver: the practical pick for the relative who loves their iPhone 8 Plus and their pontoon in equal measure.
Feature-to-Benefit Mapping
| Feature | Benefit |
|---|---|
| IP68 sealed construction | Submersion to 6.6 ft / 2 m for 30 minutes turns dock drops into anecdotes |
| 7-layer shockproof body | Eats 6.6 ft / 2 m drops onto concrete before the force reaches the big glass |
| Built-in HD screen guard | The 5.5-inch display stays scratch-free with full touch response — nothing extra to install |
| Sealed dual-camera window | Portrait mode and underwater video stay tack-sharp with zero lens risk |
| Slim 3 mm profile at 2.7 oz / 77 g | Full waterproofing without turning the Plus into a brick |
Step-by-Step Installation Guide
- Clean your iPhone 8 Plus with a microfiber cloth and remove any existing screen protector — the built-in guard needs bare glass for touch accuracy and a true seal.
- Water-test the empty case: seal a tissue inside, submerge for 30 minutes, and confirm the tissue comes out dry.
- Seat the phone face-down into the front frame, lining the silent switch up with the case's toggle lever before you close anything.
- Press the back frame on around the full perimeter until each latch clicks, then trace the seam with a fingernail to verify there are no gaps.
- Test the buttons, mute toggle, camera, speaker, and Lightning charging with an Apple or narrow MFi cable. The home button clicks normally, but plan to use your passcode — Touch ID does not read through the sealed membrane.
Troubleshooting and Tips
- Touch feels sluggish? Make sure no aftermarket screen protector is layered underneath — the membrane is designed to sit directly on the display.
- Lightning cable will not click in? The sealed port is sized for Apple's own cable or narrow MFi plugs; chunky third-party connectors will not reach.
- Speaker sounds muffled after swimming? Water sits on the acoustic membranes briefly — shake it out and give it a few minutes to air-dry.
- Mute switch not responding? Reopen the case and realign the phone's silent slider with the case toggle; it must engage when the halves close.
- Cleaning the case? Rinse in fresh water after salt exposure and wash with mild soap. Avoid alcohol wipes — they can fog the lens window and degrade the gasket.
FAQs
Which phones does this case fit?
It fits the Apple iPhone 8 Plus (2017, 5.5-inch) only. It does NOT fit the iPhone 8, iPhone 7 Plus, iPhone 7, iPhone 6s Plus, or iPhone X. For the 4.7-inch phone, see our waterproof iPhone 8 case.
What comes in the box?
The two-piece sealed waterproof case with built-in screen guard and gasket, plus a quick-start guide with water-test instructions.
How waterproof is it?
IP68 certified — fully submersible to 6.6 ft / 2 m for 30 minutes, which covers pools, lakes, snorkeling, and every realistic accidental dunk.
Does wireless charging work through the case?
Yes — the iPhone 8 Plus supports Qi charging and the slim sealed back works on most pads. This is not a magnetic case and does not add MagSafe.
What is the drop rating?
The 7-layer construction is rated for 6.6 ft / 2 m drops onto hard surfaces, with reinforced corners spreading impact away from the glass.
Does Touch ID work with the case on?
The home button clicks normally for navigation, but the fingerprint sensor cannot read through the sealed membrane — use your passcode while the case is installed.
Are buttons and ports accessible?
Yes — volume, power, and the silent switch all operate through sealed covers, and the Lightning port opens via a gasketed plug.
Can I add my own screen protector?
No — the built-in HD guard is part of the seal. Adding another layer underneath hurts touch sensitivity and can break the waterproofing.
Can I shoot photos underwater?
Yes — the sealed window keeps both lenses clear. Use the volume button as your shutter, since the touchscreen does not respond while submerged.
Does the case float?
No — the case is slim rather than buoyant. Add a floating wrist strap through the lanyard anchor for boat days.
Will it yellow or fade?
No — the black shell is pigment-stable and UV-resistant, unlike clear cases that amber with sun exposure. Rinse off salt water to keep it fresh.
Is it professional enough for work?
Yes — at roughly 3 mm of added thickness in plain matte black, it reads as a normal protective case across a conference table.
Is this a good gift?
One of our most-gifted Plus-size cases — useful year-round, sized right out of the box, and covered by free 30-day returns.
Should I re-test the seal periodically?
Yes — run the tissue test before first use, at the start of each swim season, and after any hard drop to confirm the gasket still seats cleanly.
What is the return policy?
Yes — Gorilla Cases offers free 30-day returns on all iPhone 8 Plus cases. If the case doesn't fit your iPhone 8 Plus or you're not satisfied, contact our team within 30 days for a fast replacement or full refund. No restocking fees.
Why Gorilla Cases?
Gorilla Cases exists because the phones with the best screens always end up nearest the water. The Gorilla Family trusts us because we dunk-test and drop-test every design, describe honestly what works (and what Touch ID will not do through a sealed membrane), and back every order with free 30-day returns. The Plus deserves the pool deck too. Shop now at gorillacasestore.com
Read More From Gorilla Case Blogs
Curious how our sealed designs have evolved? Read Waterproof iPhone 7 case with drop protection (black) for the design family's roots, then jump ahead with Best Waterproof and MagSafe Tech Cases for 2026.