IP65 vs IP68 Waterproof Enclosures: What Is the Difference?

When choosing a waterproof enclosure for electronics, IP ratings are one of the first specifications buyers check. IP65 and IP68 are both common ratings, but they are not the same. Selecting the wrong rating can lead to water ingress, product failure, warranty issues, and field maintenance problems.

This guide explains the practical difference between IP65 and IP68 enclosures and what engineers should consider before ordering a waterproof aluminum enclosure.

What Does an IP Rating Mean?

IP stands for Ingress Protection. It describes how well an enclosure protects internal components from dust and water.

The first digit refers to protection against solid particles such as dust. The second digit refers to protection against water.

For example:

• IP65 means dust-tight protection and resistance to water jets.
• IP68 means dust-tight protection and stronger water ingress protection under specified immersion conditions.

The exact test condition for IP68 should be confirmed with the supplier because depth and duration can vary depending on product design and application.

IP65 Enclosures

An IP65 enclosure is designed to prevent dust ingress and protect against water jets from different directions. It is often used for industrial indoor areas, semi-outdoor equipment, control boxes, monitoring devices, and electronics exposed to spray or cleaning water.

IP65 is often suitable for:

• Factory automation devices
• Wall-mounted electronic controllers
• Indoor industrial equipment
• Semi-outdoor sensor modules
• Equipment exposed to rain or water spray

For many industrial applications, IP65 provides a good balance of protection, cost, and customization flexibility.

IP68 Enclosures

An IP68 enclosure is designed for stronger water protection, usually involving immersion under specified conditions. It is commonly used for outdoor electronics, field devices, monitoring equipment, energy systems, communication products, and harsh-environment installations.

IP68 may be required for:

• Outdoor electronics exposed to heavy rain
• Remote monitoring equipment
• Marine or coastal installations
• Underground or field-mounted devices
• Products that may be temporarily submerged

Because IP68 requirements are more demanding, every sealing detail matters, including the gasket, screw structure, cable entries, connector type, and assembly method.

The Enclosure Body Is Only One Part of Waterproofing

A waterproof enclosure can fail if the accessories and assembly are not designed correctly. Even a strong aluminum housing cannot maintain water resistance if the cable gland, panel opening, gasket, or screw hole creates a leak path.

Review these points:

• Gasket material and compression
• Cable gland size and installation
• Connector sealing method
• Screw positions and torque
• Panel flatness
• Surface treatment
• Drainage and installation direction

For custom waterproof enclosures, it is important to review all cutouts before machining.

Can Waterproof Aluminum Enclosures Be Customized?

Yes, but customization must be planned carefully. CNC openings for connectors, displays, switches, antennas, and cable glands may affect sealing performance. The manufacturer should review whether the selected components and mounting method can maintain the required protection level.

Common custom options include:

• Cable gland holes
• Waterproof connector openings
• Mounting holes
• Brackets and wall-mount features
• Surface finish and color
• Logo and panel marking

If your product needs IP-rated protection, share the full installation environment with the supplier before production.

How to Choose Between IP65 and IP68

Choose IP65 if the product needs dust protection and resistance to rain, spray, or water jets but will not be immersed.

Choose IP68 if the product may face stronger water exposure, temporary immersion, or harsh outdoor conditions where higher protection is required.

Also consider:

• Where the product will be installed
• Whether it is exposed to direct rain or water pressure
• Whether it may be submerged
• Cable entry direction
• Maintenance frequency
• Required certification or customer specification

Conclusion

IP65 and IP68 enclosures both protect electronics from dust and water, but they are designed for different levels of water exposure. The correct choice depends on the installation environment, sealing design, accessories, and final assembly.

PUMAYCASE provides waterproof aluminum enclosures with CNC machining, cable gland holes, custom finishes, and engineering support for outdoor and harsh-environment electronics.

Ready to discuss your enclosure project?

Send your waterproof enclosure requirements to PUMAYCASE, including size, cutout drawings, installation environment, and target IP rating.