If an IP67 case leaks, water ingress is typically minimal rather than catastrophic. A failed seal on a properly rated case usually allows small amounts of moisture to enter rather than flooding the interior. That said, even a small amount of water can cause serious damage to sensitive electronics, optics, or precision instruments. The sections below break down exactly what happens, what causes seal failure, and what to do if you suspect your case has let water in.

How much water can actually get in through a failed IP67 seal?

A failed IP67 seal does not mean the case floods instantly. IP67 certification means the case was tested to withstand immersion in up to one meter of water for 30 minutes without water ingress. When the seal degrades, the failure is usually gradual, meaning small amounts of moisture seep in rather than rushing through. The volume depends on how badly the seal is compromised and how long the case is exposed.

A hairline crack in the gasket or a small section of compressed seal may allow only a few drops of water to enter during brief exposure. However, prolonged submersion or high-pressure water contact, such as heavy rain or a fast-moving stream, can push more water through even a minor seal gap. The pressure equalization valve, which is a standard feature on quality hard cases, can also become a weak point if it is damaged or clogged, since it is designed to balance air pressure rather than block water under pressure.

What types of equipment are most at risk from water ingress?

Electronics, optical equipment, and precision instruments are the most vulnerable to water damage inside a protective case. Even a small amount of moisture can cause corrosion, short circuits, or lens fogging that renders gear unusable. Equipment with exposed circuit boards, battery contacts, or fine mechanical components is particularly at risk.

  • Cameras and lenses: Moisture causes internal fogging, fungal growth on glass elements, and corrosion on electronic contacts
  • Drones and flight controllers: Water on circuit boards can cause immediate short circuits or delayed corrosion failures
  • Audio equipment: Condenser microphones and mixing electronics are highly sensitive to humidity and direct moisture
  • Medical devices: Diagnostic instruments and portable medical electronics can malfunction or give inaccurate readings after water exposure
  • Field electronics and communication gear: Radios, GPS units, and measurement tools often have exposed ports that allow water to reach internal components quickly

Mechanical tools and non-electronic gear are generally more tolerant of minor moisture exposure, though rust and corrosion remain concerns over time.

What damage does water cause inside a protective case?

Water inside a sealed case causes damage in two main ways: immediate electrical failure from direct contact with live circuits, and longer-term corrosion or mold growth from residual moisture. The enclosed environment of a hard case can actually accelerate damage because trapped humidity has nowhere to escape, creating a warm, moist environment that promotes corrosion and fungal growth.

Direct water contact with powered electronics causes short circuits that can destroy components instantly. Even if the gear is powered off, water leaves mineral deposits as it evaporates, which corrode metal contacts and degrade circuit board performance over time. Optical equipment suffers from internal fogging and, in humid conditions, fungal growth on lens coatings, which is often irreversible without professional cleaning. Foam interiors absorb moisture and hold it against equipment surfaces, which extends the exposure period well beyond the initial water ingress event.

Why do IP67 seals fail in the first place?

IP67 seals fail primarily due to physical wear, improper maintenance, or damage to the gasket material. The rubber or silicone gasket that creates the watertight seal degrades over time through repeated compression, UV exposure, temperature cycling, and contact with dirt or chemicals. A seal that passed IP67 testing at the factory may no longer perform to that standard after years of heavy use.

Physical damage and wear

Dropping a case, forcing it closed with debris caught in the seal channel, or storing it with the lid open in direct sunlight can all accelerate gasket degradation. Even small nicks or flat spots in the gasket break the continuous seal needed for waterproof performance. The seal channel itself can also crack or warp if the case shell takes a significant impact.

Improper use and maintenance

Dirt, sand, and grit trapped in the seal groove prevent the gasket from seating properly. Many users never clean the seal channel, which means contaminants gradually damage the gasket surface. Applying silicone grease to the gasket periodically keeps it supple and improves the seal, but this step is routinely skipped. Overpacking a case so that the lid does not close fully also stresses the gasket unevenly and creates weak points.

How can you tell if your IP67 case seal is still working?

You can check whether your IP67 case seal is still functional by performing a simple visual inspection and a basic pressure test. Run your finger along the entire gasket to feel for cracks, flat sections, hardening, or areas where the gasket has pulled away from the channel. Any visible damage is a clear sign the seal is compromised.

For a practical field test, close the case and press firmly on the lid. A case with a good seal should feel slightly resistant due to the air pressure inside. If the lid closes with no resistance at all, the seal may not be creating a proper airtight closure. You can also place a piece of paper in the seal channel before closing the case. If you can pull the paper out without resistance, the gasket is not compressing properly in that area. For critical applications, a more thorough test involves submerging the closed, empty case in a shallow container of water and watching for bubbles, which indicate air escaping through a compromised seal.

What should you do immediately if your case leaks?

If your case leaks, remove your equipment immediately and do not power on any electronics. Powering on wet electronics is the fastest way to cause permanent damage. Gently shake or blot visible water from equipment surfaces, then allow everything to dry in a warm, well-ventilated space before attempting to use it.

  1. Power off and disconnect: Remove batteries and disconnect power sources from all electronics immediately
  2. Remove gear from the case: Take everything out so moisture does not continue to sit against equipment surfaces
  3. Dry the interior: Remove foam inserts if possible and allow them to dry separately, since foam retains moisture for a long time
  4. Do not use heat: Avoid hair dryers or direct heat sources on electronics, as rapid temperature changes can cause additional damage
  5. Inspect the gasket: Identify where the seal failed before using the case again
  6. Replace the gasket or case: A compromised seal should be replaced before trusting the case with valuable equipment again

For electronics that have been exposed to water, placing them in a dry environment with good airflow for at least 24 to 48 hours before powering on gives the best chance of recovery. If the exposure was significant, professional inspection is worth considering before assuming the gear is safe to use.

How HUSK Cases helps protect your equipment from seal failure

HUSK Cases are built with IP67-certified waterproof and dustproof construction, using NK-7 high-impact polypropylene shells and quality gasket seals designed to maintain their integrity through repeated use in demanding conditions. Every case includes a pressure equalization valve to manage air pressure changes without compromising the seal, which is a common failure point on cheaper alternatives.

  • IP67-certified construction tested to withstand immersion in up to one meter of water for 30 minutes
  • NK-7 high-impact resin shell that resists warping and cracking, which protects the seal channel from deformation
  • Pressure equalization valve that balances internal air pressure without creating a water ingress point
  • Modular foam interiors that keep gear positioned away from case walls, reducing the risk of moisture contact if any condensation forms
  • 40+ case formats so you can match the right case size to your gear without overpacking, which protects the gasket from uneven stress
  • 5-year warranty covering manufacturing defects, including seal and construction integrity

If you want to make sure your gear fits properly and your interior is configured to minimize movement and moisture exposure, explore the custom interior options available from HUSK Cases to find the right layout for your equipment.

Related Articles