Galaxy S21 Plus Waterproof Case

Why the Galaxy S21 Plus Waterproof Case Is Essential for Swimmers and Beach Families

Picture your Galaxy S21 Plus filming the kids' cannonball contest — from inside the pool. This IP68 waterproof case seals your S21+ (2021, 6.7-inch display) in a 360-degree protective shell tested submerged to 6.6 ft / 1.5 m for 20 minutes, with a built-in screen protector up front and a crystal-clear back that shows off the phone's true color. Wireless charging works without ever breaking the seal, and every speaker, button, sensor, and camera stays fully usable. Built for swimmers, snorkelers, surfers, boat owners, and parents of pool kids, this is the best Galaxy S21 Plus waterproof case for water sports and bad-weather living. The Gorilla Family does not wait out the weather — and now your S21 Plus does not either.

Key Features

• 2 color choices: Black/clear and Blue/clear — a colored frame with a transparent back either way.
• Premium materials: rigid polycarbonate shells, a TPU sealing gasket, and an optically clear back panel.
• Case type: full-body 360-degree waterproof case with snap-sealed front and rear halves.
• IP68 waterproof: tested submerged to 6.6 ft / 1.5 m for 20 minutes — swimming, snorkeling, surfing, and storm commutes covered.
• Built-in screen protector: the sealed front membrane guards the 6.7-inch display while keeping touch fully responsive.
• Clear HD back: the transparent rear panel shows your phone's real color instead of hiding it.
• Charging compatibility: Qi wireless charging works through the sealed case — no removal, no broken seal. This is not a MagSafe case.
• Full functionality: precise fits for the speakers, buttons, sensors, and cameras.
• All-weather protection: rain, snow, sand, and dust are sealed out along with the water.
• Warranty backed: 1-year warranty with 24/7 support.
• Compatibility: designed for the Samsung Galaxy S21 Plus (2021, 6.7-inch) ONLY. It does NOT fit the Galaxy S21, S21 Ultra, S21 FE, S20 Plus, or S22 Plus.

Materials Explained — What Polycarbonate and TPU Gaskets Actually Feel Like

The front and rear shells are polycarbonate — the impact-resistant plastic used in bike helmets and aircraft cockpit windows. It gives the case its rigid backbone, clamping the waterproof gasket evenly around the entire phone and taking pavement hits without flexing the seal open. The rear panel is polished optically clear, so the S21 Plus's glass back stays on display.

The seal itself is TPU — the flexible polymer in running shoe soles and dive watch straps. It compresses where the two halves snap together, forming a continuous barrier against water, sand, and dust, and cushions the corners against drops. The front membrane is a thin touch-transparent layer: your swipes go through, splashes do not.

Altogether the case weighs about 2.4 oz (68 g) and adds roughly 3 mm of thickness — a real submersible housing that still slides into a beach bag pocket.

Browse More Galaxy S21 Plus Cases

Want to compare against metal or kickstand styles? Browse the full Galaxy S21 Plus cases collection, shop now and find the right protective phone case for your lifestyle.

Real-World Use Cases

• The Snorkeler: shoots reef video at 1.5 m with the volume-button shutter and rinses the case in the beach shower afterward.
• The Pool Parent: films from inside the splash zone all summer — the phone finally joins the party.
• The Boat Owner: spray, rain, and one overboard scare per season — the sealed case turns disasters into anecdotes.
• The Storm Commuter: bikes to work in real weather; the 360-degree seal treats a downpour like a sunny day.
• The Gift-Giver: the pre-vacation present that saves a phone by day three of the resort trip.

Feature-to-Benefit Mapping

Step-by-Step Installation Guide

1. Clean your Galaxy S21 Plus with a microfiber cloth and remove any aftermarket screen protector — the case includes its own.
2. Review the included user manual first — correct installation is what guarantees the seal.
3. Lay the phone into the rear shell, aligning the cameras and buttons, then snap the front frame on from top to bottom until every latch clicks.
4. Inspect the seam for gaps and confirm the charging port flap is pressed fully closed.
5. Run a 30-minute submersion test with a paper towel inside (no phone) before the first swim, then re-register your fingerprint through the front membrane.

Troubleshooting and Tips

• Touchscreen erratic underwater? Normal physics — capacitive screens and water disagree. Use the physical volume buttons as your underwater shutter.
• Call audio slightly muffled? The waterproof speaker membranes trade a little volume for the seal; speakerphone or Bluetooth restores full clarity.
• Fingerprint unlock inconsistent? Re-enroll your fingerprint with the case on and enable "Screen protector mode" in Settings.
• Fog inside after a cold swim? Open and reseal the case in a dry room — trapped humid air is the cause, not a leak.
• How should I clean it? Rinse with fresh water after salt or chlorine exposure and towel dry. Avoid alcohol wipes — they age the TPU gasket.

FAQs

Which phones does this case fit?
It fits the Samsung Galaxy S21 Plus (2021, 6.7-inch display) only. It does NOT fit the Galaxy S21, S21 Ultra, S21 FE, S20 Plus, or S22 Plus.

What comes in the box?
The front and rear case halves with gasket and built-in screen protector pre-fitted, plus a user manual covering sealed installation.

How waterproof is it, exactly?
IP68 — tested submerged to 6.6 ft / 1.5 m for 20 minutes. Built for swimming, snorkeling, surfing, and water sports; not rated for deep diving or prolonged soaking beyond the test window.

Can I take underwater photos and videos?
Yes — the clear panels keep all lenses sharp. Use the volume buttons as the shutter since touchscreens are unreliable underwater.

Does it work with MagSafe or wireless charging?
Qi wireless charging works straight through the sealed case — one of its best tricks. It is not a MagSafe case, so magnetic accessories will not attach.

Does the fingerprint sensor still work?
Yes for most users — the in-display reader works through the front membrane. Re-register your fingerprint with the case installed for the highest success rate.

What is the drop protection rating?
The rigid shells and TPU perimeter handle drops up to 6.6 ft / 2 m on land — 360-degree protection in all weather conditions.

Are the buttons and speakers usable?
Yes — sealed button covers click through cleanly, and acoustic membranes keep the speakers and microphones working.

Do I need a separate screen protector?
No — the built-in front layer is the screen protection. Remove aftermarket protectors before installing.

Can I use it in salt water?
Yes — rinse the case with fresh water afterward to keep the gasket and latches in top shape.

Why test the case before swimming?
Thirty minutes with a paper towel inside confirms your unit sealed perfectly. It is the cheapest insurance in water sports.

Will the clear back yellow over time?
The polycarbonate back resists yellowing far better than soft TPU clear cases; keep it out of weeks of direct sun storage and it stays glassy.

Is there a warranty?
Yes — a 1-year warranty with 24/7 support. Contact us first if anything is wrong and we will sort it.

Is this a good gift?
The perfect pre-vacation gift for any S21 Plus owner — and free 30-day returns cover the fit.

What is the return policy?
Yes — Gorilla Cases offers free 30-day returns on all Galaxy S21 Plus cases. If the case doesn't fit your Galaxy S21 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 builds for lives that include water — pools, oceans, storms, and sinks. The Gorilla Family trusts us because we dunk-test and drop-test every design, describe honestly (audio is slightly muffled through the membranes — we say so), and back every case with free 30-day returns. Take your S21 Plus swimming. Shop now at gorillacasestore.com

What Gorilla Family Customers Are Saying

★★★★★
Snorkeled Cozumel with it — flawless
Filmed forty minutes of reef video across two sessions, well within the rating each time. Not a drop inside. The clear back also means my phantom violet phone still looks like itself. Do the paper towel test first — instant confidence.
— Melissa R., Austin, TX

★★★★★
Survived going overboard
Phone went off the kayak into roughly four feet of lake. Retrieved it in five minutes: dry, recording, completely unbothered. Wireless charging through the case at night means I never break the seal. Brilliant design.
— Josh W., Vancouver, BC, Canada

★★★★★
Pool summer, zero anxiety
Two kids, one pool, hundreds of splash photos. The built-in protector keeps wet fingers off the real screen and the volume-button shutter works underwater. Rinses clean in seconds.
— Hannah D., Orlando, FL

★★★★★
Surf check approved
I take it in the lineup to film mates on smaller days. Snap-seal feels solid, the blue frame looks great, and after a saltwater rinse it is good as new. Touchscreen works fine above the surface.
— Liam C., Gold Coast, QLD, Australia

★★★★½
Waterproofing perfect, audio takes a small hit
Three months of boat weekends without a leak. Only honest note: callers say I sound slightly distant through the sealed mics, so I switch to speakerphone. Fair trade for a phone that survives the lake.
— Greg M., Minneapolis, MN

Read More From Gorilla Case Blogs

Planning more wet-weather protection? Read Galaxy S20 FE Waterproof Case: Rugged Full-Body Protection, or survey the whole Samsung lineup in Best Samsung Cases for Galaxy S, Note, and A Series.