Short answer: IP65 handles splashes and rain on a covered porch. IP67 survives being temporarily submerged, which is what you want anywhere water pools or freezes. IP68 is for staying underwater — but it only means something if the manufacturer states the depth and duration, because unlike the other ratings, IP68 has no fixed test. And the part almost every guide skips: a 7 or an 8 in the second digit does not automatically include the jet-spray protection of a 5 or a 6. They're separate tests.
Start here: what rating does your location need?
| Where it's going | Minimum | What actually threatens it |
|---|---|---|
| Under cabinets, shelving, dry rooms | IP20 | Nothing. Don't pay for sealing you won't use. |
| Kitchen backsplash, near a sink | IP65 | Splashes, steam, wipe-downs with a wet cloth |
| Bathroom, outside the shower enclosure | IP65 | Ambient humidity, occasional spray |
| Inside a shower, wet room, steam shower | IP67 | Direct spray plus constant condensation |
| Covered porch, soffit, under eaves | IP65 | Wind-driven rain reaches further than you think |
| Fully exposed outdoors, ground level, snow | IP67 | Standing water, ice, freeze-thaw cycling, UV |
| Planters, in-ground, near sprinklers | IP67 | Repeated saturation, soil contact, irrigation jets |
| Pools, fountains, ponds — permanently under water | IP68 | Continuous pressure, chemicals — plus electrical code |
| Saunas and steam rooms | IP67+ and a high-temp rating | Heat, not water, is what kills ordinary strips here |
That table will get most people to the right product. The rest of this guide is why, and where installs go wrong even with the correct rating on the reel.
What the two digits actually mean
IP stands for Ingress Protection, defined in the international standard IEC 60529. The first digit covers solids, the second covers liquids, and they're scored independently.
The first digit is about dust. The second is about water. Neither implies the other.
For LED strip you'll almost only ever see a 2 or a 6 in the first position. A 6 means dust-tight, which is what any sealed strip achieves as a side effect of being sealed against water. The second digit is where the real decision lives:
- 4 — splashing water from any direction
- 5 — low-pressure jets from any direction
- 6 — powerful jets from any direction
- 7 — temporary immersion, 1 m deep, 30 minutes
- 8 — continuous immersion, under conditions the manufacturer specifies
The thing most guides get wrong
It's natural to read the second digit as a ladder where 8 beats 7 beats 6 beats 5. It isn't. Jet testing and immersion testing measure different things, and passing one doesn't mean passing the other.
Two separate tracks. A product can pass immersion and still fail a pressure jet.
A strip sealed inside a silicone sleeve can sit in a bucket of water all day and survive, then let water past its end cap when you hit it with a pressure washer. Immersion applies gentle, even pressure from all sides. A jet applies concentrated force at one point, and it finds seams.
This is why serious products are marked with two ratings — IP65/IP68, or IP66/IP68. That means the product was tested on both tracks. A product marked only IP68 has told you nothing about jets.
Practical translation: if the location involves a hose, a pressure washer, a sprinkler head, or a shower head, you want a 5 or a 6 confirmed, not just a 7 or an 8.
IP68 is the one number you can't take at face value
Every other rating in the standard has a defined test. IP68 doesn't. The standard says the conditions are agreed between manufacturer and user, meaning the maker sets the depth and the duration.
So "IP68" on its own is close to meaningless. One product's IP68 is 1.5 m for 30 minutes. Another's is 2 m indefinitely. They carry the same label and are not the same product.
When you're buying anything that will actually live underwater, ask for the number: IP68, rated to X meters, continuous. If a supplier can't give you a depth and a duration, treat the rating as marketing rather than a spec.
How waterproof LED strip is actually built
The rating is a consequence of construction, and knowing the construction tells you how the strip will behave — how it bends, how hot it runs, how you cut it.
More sealing means more material over the LEDs, less flexibility, and worse heat dissipation.
IP20 — bare board. Exposed PCB and LEDs, adhesive on the back. Most flexible, coolest running, cheapest. Indoor and dry only.
IP65 — top coating. A layer of silicone applied over the top face. The sides and back are typically still exposed. Fine against splashes and rain, not against sitting water.
IP67 — silicone sleeve. The strip is fed through an extruded silicone tube, with end caps and adhesive sealing both ends. There's an air gap between the strip and the tube.
IP68 — filled. Same sleeve, but the cavity is filled with silicone or resin so there's no air gap for water or condensation to occupy. Stiffest, heaviest, and it runs the hottest.
Why you shouldn't just buy the highest rating
Over-speccing has real costs, and they aren't only financial.
Heat. Encapsulation traps heat against the LEDs, and LED life falls as junction temperature rises. A filled IP68 strip runs meaningfully hotter than the same strip bare, which is why high-output strips are rarely offered in heavy encapsulation, and why a sealed strip should be given more headroom on wattage than an open one.
Bend radius. A filled sleeve doesn't want to turn corners. If your run has tight bends, an IP68 strip will fight you, and forcing it stresses the solder joints inside.
Cut access. To cut a sleeved strip you have to open the sleeve, cut, then rebuild the seal. Every cut is a new potential failure point.
Repair. A bare strip is easy to fix. A filled strip is effectively disposable — you can't get to the board.
Pick the rating the location needs, not the biggest number on the shelf.
Where waterproof installs actually fail
In practice, the strip itself is rarely what lets go. The failures cluster in a handful of predictable places.
Every one of these is an install decision, not a product defect.
1. The cut end. The moment you cut a sealed strip, the rating is gone at that point. It has to be rebuilt with an end cap and silicone adhesive, fully cured. This is the single most common cause of failure, and it's entirely avoidable.
2. The connector. Solderless clip connectors are not waterproof, regardless of what the strip is rated. Outdoors and underwater you want soldered joints inside heat-shrink, or a connector that carries its own IP rating.
3. The wire entry. Where the lead wires pass into the sleeve is a seam, and seams move with temperature. It needs sealing and it needs strain relief so nothing tugs on it.
4. The power supply. An IP68 strip fed by an IP20 driver sitting in a damp enclosure is an IP20 system. The driver needs its own rating for where it's mounted, or it needs to be somewhere dry.
5. Condensation. Sealed doesn't mean airtight forever. Temperature cycling breathes moist air through micro-gaps, and it condenses inside the sleeve where it can't escape. This is why sleeved IP67 strips sometimes fog internally outdoors, and why filled IP68 construction exists.
6. UV. Sunlight is the slow killer. Cheap "waterproof" strips use a polyurethane coating that yellows and then cracks after a season or two outdoors, and once it cracks the rating is over. Silicone holds up far better under UV. For anything in direct sun, confirm which material you're getting — it's the difference between a strip that lasts and one that doesn't.
Saunas: the case where the rating isn't the problem
Sauna lighting trips people up because they shop for waterproofing and the real constraint is heat.
Near the ceiling of a hot sauna, air temperature commonly reaches 80–100°C. Ordinary LED strip — including well-made IP67 outdoor strip — is generally specified for an ambient maximum somewhere around 60°C. Run it in a sauna and several things happen: the adhesive backing softens and the strip falls off the wall, the silicone degrades, output drops, and the LEDs age fast.
So a sauna strip needs a stated high-temperature rating alongside its IP rating. Our sauna strip is built for this: 10 mm wide, 24V, 2835 LEDs at 120 per meter, 8W per meter, IP68, rated for operation up to 100°C.
Two installation notes that matter more than the product choice. Mount low rather than high where you can — under the benches or along the backrest — because the temperature gradient in a sauna is steep and the ceiling is the worst place for electronics. And keep the driver outside the hot room entirely; it has no high-temperature rating and no reason to be in there. A steam room is a different problem again: lower temperature, but saturated humidity, so the IP rating carries more weight there than the temperature rating.
Pools, fountains and anything permanently submerged
This is the one application where the rating is the least of your concerns.
Start with the product side. You want IP68 with a stated depth and duration, low voltage, and chemical tolerance — chlorine and salt systems both attack silicone and adhesives over time, and a strip that's fine in a garden pond may not last in a chlorinated pool. Our underwater strip is a 24V, 8 mm, IP68 build with 2835 LEDs at 120 per meter, supplied on 5 m reels.
Now the part that matters more. Permanent lighting in and around swimming pools is regulated, and in the US that means the National Electrical Code — Article 680 covers pools, spas and fountains, and local jurisdictions add their own requirements on top. Those rules govern voltage limits, bonding, GFCI protection, where the transformer can be located, and in many cases whether the fixture has to be a listed pool luminaire rather than a strip light. An IP68 rating is a test result about water ingress. It is not a statement about code compliance, and the two are not substitutes.
The practical position: use IP68 strip for decorative and accent work in water features, fountains, and pond edges, and bring in a licensed electrician before anything goes into a swimming pool or spa. Have them confirm what your jurisdiction requires before you buy, not after.
An install checklist that prevents most failures
- Confirm both digits, and look for a dual marking like IP65/IP68 if jets are involved
- Ask for the depth and duration behind any IP68 claim
- Confirm silicone rather than polyurethane for anything in sunlight
- Plan the run so cuts land where you can properly reseal them — or buy a length that needs no cut
- Solder and heat-shrink outdoor joints instead of using clip connectors
- Seal and strain-relieve the wire entry
- Mount the driver somewhere dry, or use one rated for where it goes
- Give sealed strips extra wattage headroom, since they shed heat poorly
- Leave a drip loop in the cable so water runs off rather than down into the connection
- For long exterior runs, remember voltage drop applies just as much — see our 12V vs 24V guide
Frequently asked questions
Is IP67 better than IP65?
For immersion, yes. For jets, not necessarily — those are separate tests and a 7 doesn't include a 5. If your location involves a hose or a shower head as well as pooling water, look for a product marked with both, such as IP65/IP67.
Can I use IP65 LED strip outdoors?
Under cover, generally yes — soffits, covered porches, anywhere rain doesn't sit on it. Fully exposed, no. IP65 doesn't survive standing water, and freeze-thaw cycling will work moisture into a top-coated strip.
Can I cut waterproof LED strip?
Yes, at the marked cut points, but the cut destroys the seal at that end. You have to fit an end cap with silicone adhesive and let it cure fully before the strip goes anywhere wet.
What IP rating do I need for a bathroom?
IP65 for general bathroom use, around mirrors, under vanities, along toe kicks. IP67 inside a shower enclosure or in a wet room, where the strip gets direct spray and sits in constant condensation.
Why did my waterproof strip fail anyway?
Most often an unsealed cut end, a clip connector, or a driver that wasn't rated for where it was mounted. Internal condensation and UV breakdown of a polyurethane coating account for most of the rest.
Does waterproofing make the strip dimmer?
Silicone is clear, so direct light loss is minor. The larger effect is thermal — encapsulation traps heat, and hotter LEDs produce less light and age faster. Give sealed runs more wattage headroom than you'd give a bare strip.
Are the connectors and power supply covered by the strip's IP rating?
No. The rating applies to the strip as supplied. Every connector, joint and driver has to be rated separately for where it's installed, or kept somewhere dry.
Is IP68 strip safe to put in a swimming pool?
IP68 describes water ingress resistance at a depth the manufacturer specifies. It says nothing about electrical code compliance. Pool and spa installations are regulated — in the US, under NEC Article 680 plus local rules — so have a licensed electrician confirm requirements before installing anything in a pool.
Shop by where it's going
- Outdoor & Waterproof LED Strip Lights — IP65 through IP68, including sauna and underwater builds
- LED Neon Flex — sealed by construction, the usual choice for exposed exterior outlines
- COB LED Strip Lights — dotless output, available in sealed formats
- Commercial & Specialty LED Strip Lights — high-output and high-CRI options
- Browse all LED Strip Lights
Still choosing the light itself rather than the housing? Our COB guide and single color buying guide cover density, CRI and color temperature.
