What Do IP Ratings Actually Mean for Outdoor Gear?
An IP rating is two answers bolted together, and people read them as one promise. The first digit is dust. The second is water, under conditions you probably do not have.
KEY TAKEAWAYS
- Two digits, two separate tests. A six for dust says nothing about water.
- IPX7 means 30 minutes at one metre of still, fresh water. Not swimming, not a hose.
- The higher water digit only defines its own conditions, so IP68 needs the maker's numbers.
- The rating describes a new enclosure tested once. Salt, pressure, heat and age sit outside it.
Waterproof is a marketing word. An IP rating is a test result, and the difference matters the first time gear fails in weather. The code comes from a single international standard, IEC 60529, and it reports two independent things: how well the enclosure keeps solids out, and how well it keeps water out under one defined set of conditions. Read both digits properly and you can usually predict what a light, a radio or a power station will survive. Read the label as a single promise and you will take a splash-rated device swimming.
Where the code comes from, and what it is for
IEC 60529 is a standard published by the International Electrotechnical Commission. Its full name is precise: degrees of protection provided by enclosures. It was written to describe how a box protects the person touching it from live parts inside, and how it keeps foreign objects and water out. That origin explains a lot. The test is about an enclosure, not about a device, its electronics or its warranty.
The letters stand for ingress protection. A full code has the letters, then two digits, then sometimes nothing else. IP67 means digit six for solids and digit seven for water. The code is only meaningful with both digits, which is why a missing digit is replaced by an X rather than being dropped.
The first digit: solids, from 0 to 6
The solids digit runs from 0 to 6, and it scales from a finger to a fine dust. A 2 keeps out a finger. A 4 keeps out a wire and most tools. A 5 is dust protected: some ingress is allowed, but not enough to stop the device working. A 6 is dust tight, the only grade that admits no dust at all.
For anything that lives in a vehicle, a barn, a beach bag or a storm the gap between 5 and 6 is the one worth paying for. Dust is what kills gear slowly. It cakes on a circuit board, it holds moisture against contacts and it grinds into a fan. Sand is simply dust with a worse temper.
The second digit: water, and the five grades that matter
The water digit runs further and is far easier to misread. In consumer gear you will meet a handful of grades over and over, and each one is a different physical test.
A 3 handles spraying water at an angle, so a drizzle blown sideways is covered. A 4 handles splashing from any direction, which is roughly a downpour or a splash off a puddle. A 5 is a low pressure jet, a hose at a distance rather than a storm. A 6 is a powerful jet, closer and stronger. None of those four mention immersion.
There is a further subtlety at the top of the scale. A 9 or 9K covers high pressure, high temperature washdown, which is a food plant or a vehicle bay, not a river crossing. Gear rated for that is rare, and its absence is not a flaw.
Splashing, jets and immersion are three different tests. Only digits 7 and above mention water covering the device entirely.
What the test never covers
The water in the test is fresh, clean and at rest. Salt water is more corrosive and gets into smaller gaps. Soaking in a pool adds chlorine and warmth. A river adds silt and movement. A wave adds pressure far above a static column of water. None of those are the tested condition, and a device can pass its rating honestly and still corrode in the sea.
Temperature is another gap. Steam and hot water move through seals that cold water will not pass, which is why a shower and a swimming pool fail a rating in different ways. Pressure washing combines heat with force. Drops, UV and flexing age the seals, and a two year old enclosure is not the enclosure that was tested.
Then there is the port problem. A rating describes the device as tested, usually with every lid closed and nothing plugged in. Open the charge flap and the rating no longer applies to what is exposed. Some makers publish a second rating for the device in use, and it is almost always lower. A cable left plugged through a seal is the most common failure point in the whole system.
How to choose a rating for your actual use
Work from the worst thing that will realistically happen to the device, not from the label you would like to read.
Gear stored in a car, a shed or a boat that sees dust and occasional rain wants a 5 or 6 for solids and a 4 or 5 for water. That is IP54 or IP65, and it covers a storm in a bag. A torch, radio or battery kept outside all year wants dust tight plus a jet, so IP65 as a floor.
If water is the real risk, a rating plus a dry bag beats a bigger number alone. Seals fail at a seam; a bag has no seams to fail.
Frequently asked questions
- Is IP65 waterproof?
It is jet proof, not waterproof. A five for water means the enclosure survives a low pressure jet from a nozzle at a defined distance. It says nothing about submersion. If a device rated IP65 goes under water, especially with any opening facing down, expect ingress. Only a seven or higher addresses immersion.
- Is IP67 better than IP68?
Not automatically. Seven is a fixed, published condition: thirty minutes at one metre. Eight means deeper or longer, but the exact figures are set by the manufacturer rather than the standard. So a well built IP67 unit may outperform a cheap IP68 one whose stated conditions are barely beyond one metre. Read the maker's depth and time.
- What does the X mean, as in IPX4?
It means that digit was not tested or not claimed, and it is held as a placeholder so the remaining digit stays in the right position. IPX4 gives you a water rating with no dust claim at all. It is common on headphones, where dust ingress is not the failure mode anyone worries about.
- Can I restore the seal on old gear?
Sometimes, and it is worth trying on something expensive. Check the groove for grit or a flattened O ring, replace the ring with the same cross section, and make sure the lid closes squarely. Any grease must be compatible with the seal material. Once you have done that, remember the device no longer carries its rating. It behaves like a sealed box, not a tested one.
Keep reading
Editorial standards & sources
Digit scales, the still-water immersion conditions and the definition of the higher grades were taken from the standard's own publisher and cross checked against laboratory descriptions of IEC 60529 test setups. We report no ingress testing of our own and no measured results for any specific product.
Safety note: Ingress protection is not electrical safety advice for a damaged device. Water inside a mains powered appliance or a lithium battery pack is a shock and fire risk. Stop using it, unplug it, let it dry fully and have anything that smells burnt or has taken on water inspected before it is powered again.
- IEC — Ingress protection (IP) ratings(standards_body)
- IEC 60529, Degrees of protection provided by enclosures (IP Code)(standard)
Last fact-checked 2026-10-14. Next review due 2027-04-14.