What Do IP67 and IP68 Mean? Dust and Water Protection Explained
IP67 and IP68 are protection ratings that indicate how well a product is protected against dust and water. The first digit refers to dust protection, the second to water resistance.
When selecting LED lighting for tractors and agricultural vehicles, these ratings come up frequently. Understanding exactly what they mean makes it easier to specify the right product for the right application — and to advise customers with confidence.
This article provides a clear and practical explanation of each rating, so dealers and technical staff can quickly determine which IP value applies to a given machine or use case.
Quick overview:
- IP = Ingress Protection
- First digit = protection against dust (0–6)
- Second digit = protection against water (0–9)
- IP67 = fully dustproof + temporary submersion
- IP68 = fully dustproof + prolonged submersion
- IP69K = resistant to high-pressure cleaning
What Does IP Mean?
IP stands for Ingress Protection and is an international standard (IEC 60529) that indicates how well a product is protected against dust and water. An IP code consists of two digits: the first indicates protection against solid particles and dust, the second indicates protection against water.
For example, in the rating IP67:
- 6 = fully dustproof
- 7 = protected against temporary submersion in water
Dust Protection: First Digit Overview
| Digit | Protection | Description |
|---|---|---|
| 0 | No protection | No protection against contact or dust |
| 1 | Large objects | Protected against objects larger than 50 mm |
| 2 | Medium objects | Protected against objects larger than 12.5 mm |
| 3 | Small objects | Protected against objects larger than 2.5 mm |
| 4 | Very small objects | Protected against objects larger than 1 mm |
| 5 | Dust resistant | Dust may enter but not in harmful quantities |
| 6 | Dustproof | Fully protected against dust ingress |
Water Protection: Second Digit Overview
| Digit | Protection | Description |
|---|---|---|
| 0 | No protection | No protection against water |
| 1 | Dripping water | Protected against vertically falling water drops |
| 2 | Dripping water when tilted | Protected against drips at up to 15 degrees tilt |
| 3 | Spraying water | Protected against water spray up to 60 degrees |
| 4 | Splashing water | Protected against water splashing from any direction |
| 5 | Water jets | Protected against water jets at normal pressure |
| 6 | Powerful water jets | Protected against powerful water jets |
| 7 | Temporary submersion | Protected against temporary submersion, typically up to 1 metre for up to 30 minutes |
| 8 | Prolonged submersion | Suitable for prolonged submersion; depth and duration specified by manufacturer |
| 9 / 9K | High pressure / high temperature | Protected against high-pressure cleaning with hot water |
IP67 vs IP68: What Is the Difference?
IP67 means a product is fully dustproof and protected against temporary submersion in water, typically up to approximately 1 metre deep for a maximum of 30 minutes.
IP68 also means fully dustproof, but additionally suitable for prolonged submersion. The exact depth and duration are defined by the manufacturer and the specific product.
Important to note: IP68 does not automatically mean unlimited waterproofing. Always verify the product specifications.
Which IP Rating Is Needed for Agricultural Applications?
A simple guideline for common use cases:
- Standard work light on a tractor or agricultural machine? → IP67 is the correct choice in the vast majority of cases
- Machine operating in extremely wet conditions (slurry injection, flooded fields)? → Choose IP68
- Machine cleaned daily with a high-pressure washer? → Choose IP69K
- Outdoor use only with rain exposure (barn, yard, shed)? → IP65 / IP66 is sufficient
IP65 / IP66 — Standard Outdoor Use
Suitable for situations where a lamp is primarily exposed to rain and splashing water, but not mud or submersion. For lamps mounted on tractors and machines, this is generally not sufficient — IP67 is the recommended choice for vehicle applications.
Typical applications: lamps on building facades or barns, yard lighting, barn and shed lighting.
IP67 — The Standard for Tractors and Agricultural Machinery
IP67 is the most widely used and recommended IP class for LED lighting in agriculture. The rating provides full dustproofing and protection against temporary submersion, making it the correct specification for virtually all tractor, implement, and trailer lighting applications. For the vast majority of agricultural use cases, a higher classification offers no practical advantage.
Typical applications: LED work lights on tractors (John Deere, Fendt, New Holland, Claas, Case IH, Massey Ferguson, Deutz-Fahr, Valtra), work lights on combines and forage harvesters, lighting on trailers and silage wagons, headlights and position lights on agricultural vehicles.
IP68 — For Extreme Wet Conditions Only
IP68 is only required in specific situations where a lamp remains wet for extended periods or comes into regular direct contact with water. For standard tractor applications, IP67 is sufficient.
Typical applications where IP68 is the appropriate choice: machines operating in extremely wet conditions, lighting on equipment used in flooded fields, boat trailers briefly submerged to launch a vessel.
IP69K — For Daily High-Pressure Cleaning
IP69K is only required when a machine is genuinely subjected to daily intensive high-pressure and high-temperature cleaning. This is the only classification specifically tested for high-pressure cleaning. For most agricultural users, this is not necessary — it is primarily relevant for contractors and operators who clean machines thoroughly between jobs.
Typical applications: agricultural machinery cleaned daily with a high-pressure sprayer, livestock transport vehicles and milk tanks with strict hygiene requirements, boat lighting.
Can IP67 or IP68 Lamps Be Cleaned with a High-Pressure Washer?
This is one of the most frequently asked questions in agricultural lighting. The short answer: only lamps rated IP69K have been specifically tested for cleaning with high pressure and high temperature. An IP67 or IP68 rating says nothing about resistance to a directed high-pressure jet.
IP67 and high pressure: A lamp with IP67 is protected against temporary submersion, which is different from a hard, directed spray. Water under high pressure can still be forced past seals, joints, or connection points. General rinsing of the vehicle is fine — avoid directing the spray nozzle at the lamp itself or its connectors.
IP68 and high pressure: IP68 is also not automatically suitable for high-pressure cleaning. Submersion applies uniform pressure, whereas a high-pressure nozzle delivers a concentrated jet. The same advice applies: general rinsing is acceptable, but avoid directing the spray directly at the lamp or its connections.
Practical advice for daily use:
- Maintain at least 30 cm distance between the spray nozzle and the lamp
- Do not spray directly at connectors, cable inlets, or seals
- Avoid hot water unless the lamp is explicitly rated IP69K
- If the machine is cleaned intensively on a daily basis, specify IP69K when replacing lighting
Common Misunderstandings
“IP67 means waterproof”
IP67 means a product can be temporarily submerged, but it is not designed for prolonged use underwater.
“IP68 is always better than IP67”
This depends entirely on the application. For the majority of work lights on tractors and agricultural machinery, IP67 is more than sufficient. A higher rating only adds value if the specific use case genuinely requires it.
“IP68 means I can clean the machine with a high-pressure washer”
No. Submersion and high-pressure cleaning are two different things. Only IP69K is specifically tested for this.
Frequently Asked Questions
What does IP rating mean?
An IP rating indicates how well a product is protected against dust and water. The code consists of two digits: the first indicates dust protection (0–6), the second indicates water protection (0–9).
What is the difference between IP67 and IP68?
IP67 means a product is fully dustproof and protected against temporary submersion in water, typically up to approximately 1 metre deep for a maximum of 30 minutes. IP68 is also dustproof but suitable for prolonged submersion. Exact depth and duration vary by manufacturer and product.
Is IP67 waterproof?
Not fully. IP67 means a product is protected against temporary submersion within the test standard. It is not intended for prolonged use underwater.
Does IP68 mean a lamp is completely waterproof?
No. IP68 indicates suitability for prolonged submersion, but this does not mean unlimited or unconditional waterproofing. The specific limits depend on the manufacturer and product design.
Can an IP67 or IP68 lamp be cleaned with a high-pressure washer?
Not automatically. IP67 and IP68 relate to dustproofing and submersion, not protection against a directed high-pressure jet. For high-pressure cleaning, IP69K is the correct specification. With IP67 or IP68, maintain sufficient distance and avoid spraying directly at connectors or seals.
Which IP rating is needed for a work light on a tractor or agricultural machine?
For work lights on tractors and agricultural machinery, IP67 is the correct specification in the majority of applications. If the machine regularly operates in flooded fields or extremely wet conditions, IP68 is the better choice. If the machine is cleaned daily with a high-pressure washer, IP69K is the safest specification.
Which IP rating do original LED work lights on John Deere, Fendt, or New Holland carry?
Most original and aftermarket LED work lights for major tractor brands carry a minimum rating of IP67. Professional work lights for demanding applications often carry IP68 or IP69K, particularly where the machine is routinely cleaned with a high-pressure washer. Always verify the specifications of the specific product.
For product-specific information or advice on which CRAWER product is right for a particular application, contact your CRAWER account manager or find a dealer via our dealer locator.
