What Is Moisture Resistant Concealment? (IP67 Seals)
Moisture-resistant concealment is a serviceable enclosure integrated into a wall, floor, or other building feature to protect equipment from dust and temporary immersion. An IP67 rating applies only to the tested enclosure assembly, not to the building or its waterproofing. Use the manufacturer’s listed configuration, preserve access, and follow local codes and installation instructions.
Remember the old metal junction box in a garage, or the hatch that gave access to pipes beneath a floor? Those details worked because they balanced protection with access. I use the same principle when planning a discreet, built-in enclosure: it should blend with its surroundings, but remain safe to inspect and service.
What IP67 means for a built-in enclosure
IP67 is an ingress-protection rating under IEC 60529. The first digit, 6, means dust-tight under the standard’s test. The second digit, 7, means the enclosure passed a defined temporary-immersion test. Neither digit certifies the surrounding wall or floor as waterproof.
The rating describes a specific product and tested setup. It does not guarantee that any box labeled IP67 will remain protected after a person changes its lid, gasket, fasteners, cable entries, or mounting orientation. A flush finish around an enclosure is an architectural choice; the actual seal still depends on the tested enclosure parts and their correct installation.
For IPX7, testing generally involves immersion for 30 minutes. For an enclosure less than 850 mm high, its lowest point is set 1 m below the water surface. For a taller enclosure, its top is set 150 mm below the surface. Check the product documents for the applicable test conditions and limits.
IP67 does not mean water-jet resistant. The X in IPX7 means that this rating does not state a water-jet test result. Protection against jets requires the relevant IPX5 or IPX6 rating. Do not assume an IPX7 enclosure also passed either test.
The practical takeaway: choose a rating for the expected exposure, then keep the full tested assembly intact.
Planning: Exposure, rating and code
Planning means identifying how water, dust, heat, building materials, and service needs affect the enclosure before you cut an opening or attach hardware. It also means checking the locally adopted code and manufacturer’s instructions. An IP rating is one input, not permission to ignore installation rules.
Start by describing the exposure in plain terms. Is the enclosure in a damp utility room, near occasional splash, or somewhere that could briefly flood? Could water pool around it, or run down a wall into a cable entry? These details matter because an IP67 immersion rating does not address every water exposure, such as jets, pressure washing, or prolonged submersion.
Then check the local code requirements that apply to the equipment and location. The adopted NEC, IRC, or IBC provisions, as applicable, and the equipment’s listing and instructions govern the installation. Requirements vary by use and jurisdiction, so confirm the applicable edition with the authority having jurisdiction or a qualified trade professional where needed.
Before selecting a product, review:
- Documented IP rating and the conditions under which it applies
- Allowed mounting orientation and installation location
- Compatible lids, gaskets, fasteners, plugs, and cable glands
- Equipment size, cable routing, and space needed for service
- Temperature range and permitted heat dissipation
- Substrate strength, drainage paths, and nearby utilities
A flush-mounted finish must not cover a required label, block inspection, or prevent access required by code or the equipment instructions. Treat access as part of the design, not an afterthought.
Access and clearances: Serviceability, utilities and heat
Serviceability means a qualified person can open, inspect, and maintain the equipment without damaging the enclosure or nearby building materials. Clearance means leaving the space required for operation, maintenance, and any applicable code rules. A neat finish is not a substitute for either.
Before mounting, confirm the equipment dimensions and the lid’s full opening path. Check that nearby trim, flooring, stored items, or a door will not block access. Electrical equipment may require specific working space and access clearances under the locally adopted code. Do not rely on a general rule of thumb; check the applicable code and product instructions for the installation.
Also locate concealed utilities before cutting or fastening. Use suitable plans and detection methods, and stop if the location of wiring, plumbing, framing, or other services is uncertain. A building professional can help assess a proposed opening where it affects structural members or rated assemblies.
Account for heat inside a sealed enclosure
A thermal trap is a sealed space where heat from equipment builds up faster than it can escape. An IP67 enclosure may retain heat, so check the manufacturer’s temperature and heat-dissipation limits for the intended equipment and environment.
Do not drill a vent or add an unapproved fan to solve overheating while continuing to claim the original IP67 rating. A vent changes the tested assembly. Instead, consider a larger enclosure or a manufacturer-approved thermal-management option that maintains the required protection. If the equipment’s heat output or the enclosure’s limits are unclear, get guidance from the manufacturer or a qualified installer before proceeding.
Execution: Mounting, seals and penetrations
Execution means supporting the enclosure, fitting its approved sealing parts, and making only the entries allowed by its documentation. The seal is a system: lid, gasket, fasteners, plugs, glands, and mounting position must match the tested configuration. A careful finish cannot make an untested combination IP67.
Prepare the opening and support. Confirm dimensions, framing, substrate, and nearby services. Support the enclosure as its manufacturer requires. Do not cut or weaken structural members without confirming that the work is permitted and properly designed.
Mount in the approved orientation. Use specified fasteners and mounting points. Keep the enclosure out of drainage paths where water may collect or enter at a cable connection. Follow any instructions for the wall, floor, or other mounting surface.
Preserve the gasket interface. Keep the sealing surfaces clean and undamaged. Fit the specified gasket and lid as directed. Use the manufacturer’s required fastener sequence and torque, if provided. There is no universal gasket-compression value or fastener torque for all IP67 enclosures.
Use approved cable entries. Fit only the glands, plugs, and entry locations allowed by the product documentation. Check cable size and entry direction against the gland instructions. Improvised holes, substitute fittings, and sealant-only patches do not preserve an IP67 claim unless the complete configuration is qualified accordingly.
Finish around, not across, the seal. Trim, flooring, or wall finish should not interfere with the lid, gasket, fasteners, or access. Avoid covering the enclosure’s joint with material that must be broken to open it.
These steps apply to the enclosure assembly, not to all building moisture risks. For example, an IP67 box does not replace required drainage, flashing, or other building-envelope measures. Select those measures for the specific wall or floor design and local requirements.
Case studies: Applying the rating to real conditions
These examples are illustrative planning scenarios, not claims that a particular installation has been tested. Each shows how exposure, access, and product limits affect the choice. In every case, the manufacturer’s documentation and local code determine what is acceptable.
| Scenario | Main concern | Practical approach |
|---|---|---|
| Utility-room equipment near a floor drain | A leak could cause water to pool | Check the expected water exposure, mounting location, and product limits. Keep entries out of likely drainage paths and preserve required service access. |
| Outdoor equipment on a sheltered wall | Wind-driven rain, dust, and temperature changes | Confirm that the enclosure’s rating suits the actual exposure. Check its approved orientation, cable glands, operating temperature, and mounting instructions. |
| Equipment in a flush wall niche | Lid access and heat buildup | Keep the lid removable and required clearances open. Check heat-dissipation limits before enclosing energized equipment. |
In a utility-room example, I would first ask whether water could merely splash the enclosure or actually surround it. That distinction affects product selection and placement. A rating alone cannot answer what happens when water enters through an unapproved cable connection or pools around a poorly chosen mounting point.
For an outdoor wall, the question is not just “Is it IP67?” I would check whether the product is suitable for that location, whether its mounting orientation is permitted, and whether the installed fittings match its tested setup. Exposure to jets still calls for an appropriate jet rating, not an assumption based on IPX7.
For a niche, a flush appearance should not make the lid inaccessible or trap heat. If the assembly needs a vent to stay within temperature limits, the enclosure choice or approved thermal plan needs review.
Verification: Assembly integrity and documentation
Verification means checking that the installed enclosure matches its instructions and keeping enough records to identify its rating and configuration later. A visual check can catch missed fasteners or a damaged gasket, but it does not turn an altered assembly into a tested IP67 product.
Before closing the surrounding finish, check:
- Enclosure model and documented rating
- Correct lid and gasket, seated as instructed
- Specified fasteners installed as directed
- Approved cable glands and plugs fitted at the permitted locations
- Mounting orientation and support consistent with instructions
- Clear access, required clearances, and acceptable heat conditions
Photograph the model label and installation before the enclosure is covered by adjacent trim. Keep the manufacturer’s instructions, product data, and any relevant approval or inspection records with the building documents. If a part is damaged, missing, or substituted, ask the manufacturer or a qualified installer whether the assembly remains suitable.
Do not perform an immersion test on an installed electrical assembly unless the manufacturer and applicable safety procedures specifically permit it. An informal water test may damage equipment or create a hazard, and it does not establish compliance with IEC 60529.
The key test is documentary as well as visual: can you show that the installed parts and mounting match the product’s qualified configuration? If not, do not describe the altered assembly as IP67.
FAQ: IP67 moisture-resistant enclosures
These answers clarify what the rating does and does not establish. Always check the enclosure documentation and locally adopted requirements for a specific installation. A product rating alone cannot confirm that a complete building installation is compliant.
Is IP67 waterproof?
It is dust-tight and passes a defined temporary-immersion test. “Waterproof” can imply broader protection, so check the product limits and exposure conditions.
Does IP67 protect against water jets?
Not by itself. IPX7 does not establish an IPX5 or IPX6 water-jet result.
How long is an IPX7 immersion test?
Generally 30 minutes under the IEC 60529 test conditions. Check the product documentation for the tested setup.
Can I drill a hole in an IP67 enclosure?
Not while assuming the original rating still applies. A field modification can change the tested assembly. Use only entries and fittings allowed by the manufacturer.
Can I replace the gasket with a similar one?
Do not assume a similar gasket preserves the rating. Use the specified part or get written guidance from the manufacturer.
Is sealant enough to make a cable entry IP67?
No general sealant-only repair establishes an IP67 rating. Use approved cable glands, plugs, and installation methods.
Can I add a vent to stop heat buildup?
An unapproved vent can defeat the ingress rating. Check the heat limits and use a larger enclosure or approved thermal-management option.
Does an IP67 box make a wall or floor waterproof?
No. The rating applies to the enclosure assembly, not the surrounding building materials or envelope.
Does IP67 remove the need for electrical clearances?
No. Keep the access and working space required by the applicable code and equipment instructions.
What should I check before calling an installation IP67?
Confirm that the lid, gasket, fasteners, glands, plugs, mounting orientation, and other parts match the tested configuration. If you cannot verify that, avoid claiming the installed assembly is IP67.
(This article was written by one of our staff writers, Garrett Vance. Visit our Meet the Team page.)
