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Waterproof Enclosures & Boxes

Waterproof enclosures ensure internal electrical and electronic components are protected in any environment. Durability guaranteed, waterproof boxes and weatherproof enclosures are specifically designed to meet and exceed various NEMA and IP requirements, making them ideal for both indoor and outdoor applications. From smaller waterproof boxes for electronics to large weatherproof electrical enclosures, we offer a variety of styles, sizes, and materials to choose from.

With a watertight gasket, sealed enclosures are guaranteed to keep electronic and electrical equipment safe in wet conditions. Most watertight enclosure models are also dust-tight, providing near-total protection from inclement weather, and some offer resistance to other environmental hazards such as corrosion and/or submersion.

Waterproof electrical boxes are available in polycarbonate plastic, aluminum, and steel varieties and are common in industries such as alternative energy, agriculture, oil and gas, food and beverage, marine, and more.

We offer a variety of waterproof NEMA accessories to ensure final products maintain NEMA and IP ratings. Read more below for key information that will help you choose the best weatherproof box for your needs.

Applications of Waterproof Enclosures

Waterproof enclosures fulfill a wide range of purposes. They can guard sensitive electronic equipment, or they might serve as electrical outlet boxes or electrical junction boxes in harsh environments. Many are designed to work as either indoor or outdoor electrical boxes, with features that allow them to excel in either role. Anywhere that water hazards such as wet weather or hose spray threaten electrical and electronic equipment, waterproof enclosures are must-haves.

Whether you’re using them to house receptacles, control panels, circuit breakers, or another type of equipment, it’s critical to select waterproof enclosures that meet your needs. First, determine the protective requirements of your specific outdoor application. Outdoor outlets have different needs from electronics on a factory floor, which have different needs from high voltage switchgear. Some might be in a sheltered area and only need protection from light precipitation, while others might require full NEMA 6P submersion resistance.

Get familiar with the NEMA and IP rating scales, to understand the level of protection your enclosure needs. It’s also important to learn about the differences between the types of electronic enclosure materials to help select the best option for your project. Finally, note any relevant industry-specific guidance, such as best practices for selecting outdoor telecom equipment enclosures.

Weatherproof Electrical Boxes from Polycase

Waterproof junction boxes and electronics enclosures are key to the value that Polycase offers. Our customers depend on us for enclosure boxes that perform under stress and offer the features that make a difference, such as:

  • Heavy-duty materials like polycarbonate, diecast aluminum, and stainless steel
  • Silicone rubber gasket seals and weatherproof covers for excellent protection against dust and liquids
  • NEMA- and IP-rated, UL Listed enclosures
  • Available with NEMA 4X corrosion resistance and NEMA 6P submersion resistance
  • Specialty enclosures available, such as enclosures with hinged covers or with built-in knockouts for connectors
  • Quick and easy customization through our custom CNC machining and digital printing services, with instant quotes and fast turnaround times

We make it easy to find all of the waterproof electrical enclosures you need in one place. Shop our selection of weatherproof boxes here, using the filtering tools in the sidebar to find the features, materials, and sizes that match your application’s requirements.

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  1. HD-44F Duo enclosure photo black and gray
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    HD-44F NEMA Polycarbonate Enclosure
    As low as $7.64 per unit
    Internal: 4.1" x 4.1" x 1.9"
    106 x 106 x 48 mm
    External: 4.6" x 4.6" x 2.3"
    118 x 118 x 60 mm
    Material: Polycarbonate
  2. Polycase plastic electronic enclosure
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    ML-57F Weatherproof NEMA Enclosure
    As low as $15.79 per unit
    Internal: 8.2" x 4.7" x 1.9"
    209 x 121 x 49 mm
    External: 8.7" x 5.2" x 2.2"
    222 x 133 x 57 mm
    Material: Polycarbonate
  3. Diecast aluminum waterproof electronic enclosure
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    AN-02P Diecast Aluminum NEMA Enclosure
    As low as $10.31 per unit
    Internal: 4.0" x 2.0" x 0.9"
    103 x 53 x 25 mm
    External: 4.5" x 2.5" x 1.1"
    115 x 65 x 30 mm
    Material: Aluminum
  4. HD-58F Duo enclosure photo black and gray
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    HD-58F NEMA Polycarbonate Enclosure
    As low as $11.30 per unit
    Internal: 7.5" x 4.7" x 2.3"
    191 x 121 x 59 mm
    External: 8.0" x 5.2" x 2.7"
    203 x 133 x 69 mm
    Material: Polycarbonate
  5. SK-14-02 Gray waterproof junction box with knockouts - 4.33 x 4.33 x 2.6 inches
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    SK-14 Enclosure with Knockouts
    As low as $19.05 per unit
    Internal: 3.9" x 3.9" x 2.1"
    101 x 101 x 54 mm
    External: 4.3" x 4.3" x 2.6"
    110 x 110 x 66 mm
    Material: Polycarbonate
  6. Polycase plastic electronic enclosure
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    ML-92F Weatherproof NEMA Enclosure
    As low as $44.57 per unit
    Internal: 11" x 8.5" x 3.9"
    294 x 217 x 99 mm
    External: 12" x 9.0" x 4.2"
    305 x 229 x 108 mm
    Material: Polycarbonate
  7. Polycase waterproof electrical enclosure
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    ML-48F Weatherproof NEMA Enclosure
    As low as $12.43 per unit
    Internal: 7.1" x 4.1" x 1.9"
    181 x 105 x 49 mm
    External: 7.6" x 4.6" x 2.2"
    193 x 117 x 57 mm
    Material: Polycarbonate
  8. ML-46F*15 Gray outdoor NEMA 4x enclosure for electronics - 6.13 x 4.63 x 2.44 inches
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    ML-46F Outdoor NEMA Enclosure
    As low as $12.02 per unit
    Internal: 5.6" x 4.2" x 2.1"
    145 x 107 x 54 mm
    External: 6.1" x 4.6" x 2.4"
    156 x 118 x 62 mm
    Material: Polycarbonate
  9. AN-07P Natural diecast aluminum enclosure for electronics - 8.76 x 5.75 x 2.17 inches
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    AN-07P Diecast Aluminum NEMA Enclosure
    As low as $30.94 per unit
    Internal: 8.3" x 5.3" x 1.9"
    211 x 135 x 50 mm
    External: 8.7" x 5.7" x 2.1"
    223 x 146 x 55 mm
    Material: Aluminum
  10. Polycase plastic electronic enclosure
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    ML-36F Outdoor NEMA Enclosure
    As low as $11.01 per unit
    Internal: 6.0" x 2.8" x 2.5"
    154 x 71 x 65 mm
    External: 6.5" x 3.2" x 3.3"
    165 x 83 x 86 mm
    Material: Polycarbonate
  11. Polycase waterproof electrical enclosure
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    ML-22F Outdoor NEMA Enclosure
    As low as $5.80 per unit
    Internal: 2.2" x 2.2" x 1.3"
    58 x 58 x 35 mm
    External: 2.6" x 2.6" x 1.6"
    67 x 67 x 41 mm
    Material: Polycarbonate
  12. outdoor electrical enclosure

    AMERICAN MADE | HP SERIES

    Engineered for reliability, the HP Series offers the weatherproof protection you need at a price you want. Available in black or gray, with an optional clear cover and various external mounting styles to best suit your project.

    SHOP THE HP SERIES
  13. AN-09F Natural diecast aluminum enclosure with flanges for wall mounting - 4.75 x 4.75 x 4 inches
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    AN-09F Diecast Aluminum NEMA Enclosure
    As low as $42.97 per unit
    Internal: 4.0" x 4.0" x 3.8"
    102 x 102 x 97 mm
    External: 4.7" x 4.7" x 4.0"
    121 x 121 x 102 mm
    Material: Aluminum
  14. HD-25F Duo enclosure photo black and gray
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    HD-25F NEMA Polycarbonate Enclosure
    As low as $5.72 per unit
    Internal: 4.1" x 2.1" x 1.9"
    106 x 54 x 49 mm
    External: 4.6" x 2.6" x 2.3"
    118 x 67 x 60 mm
    Material: Polycarbonate
  15. HD-22F Black Enclosure
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    HD-22F NEMA Polycarbonate Enclosure
    As low as $3.88 per unit
    Internal: 2.1" x 2.1" x 1.3"
    55 x 55 x 34 mm
    External: 2.6" x 2.6" x 1.6"
    67 x 67 x 41 mm
    Material: Polycarbonate
  16. ML-44F*15 Gray outdoor waterproof box rated NEMA 4x and NEMA 6P - 4.5 x 4.5 x 2.44 inches
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    ML-44F Outdoor NEMA Enclosure
    As low as $11.10 per unit
    Internal: 4.0" x 4.0" x 2.1"
    103 x 103 x 54 mm
    External: 4.5" x 4.5" x 2.4"
    114 x 114 x 62 mm
    Material: Polycarbonate
  17. Diecast aluminum waterproof electronic enclosure
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    AN-22P Diecast Aluminum NEMA Enclosure
    As low as $40.09 per unit
    Internal: 7.4" x 4.2" x 2.8"
    189 x 108 x 71 mm
    External: 7.8" x 4.7" x 2.9"
    200 x 120 x 75 mm
    Material: Aluminum
  18. Polycase plastic electronic enclosure
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    ML-70F Plastic NEMA Enclosure
    As low as $25.30 per unit
    Internal: 9.5" x 6.5" x 3.7"
    243 x 166 x 95 mm
    External: 10" x 7.0" x 4.0"
    254 x 178 x 103 mm
    Material: Polycarbonate
  19. AN-12P Natural diecast aluminum enclosure for electronics - 3.85 x 2.52 x 1.35 inches
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    AN-12P Diecast Aluminum NEMA Enclosure
    As low as $10.01 per unit
    Internal: 3.5" x 2.1" x 1.1"
    89 x 55 x 28 mm
    External: 3.8" x 2.5" x 1.3"
    98 x 64 x 34 mm
    Material: Aluminum
  20. AN-19F Natural diecast aluminum enclosure with flanges for wall mounting - 3.13 x 2.93 x 2.05 inches
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    AN-19F Diecast Aluminum NEMA Enclosure
    As low as $22.19 per unit
    Internal: 2.7" x 2.5" x 1.9"
    69 x 64 x 49 mm
    External: 3.1" x 2.9" x 2.0"
    80 x 74 x 52 mm
    Material: Aluminum
  21. SB-35
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    SB-35 NEMA Steel Enclosure
    As low as $104.24 per unit
    Internal: 15" x 11" x 5.7"
    392 x 292 x 147 mm
    External: 15" x 11" x 5.9"
    400 x 300 x 150 mm
    Material: Steel
  22. German-made knockout-box from Polycase
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    SK-20 Enclosure with Knockouts
    As low as $49.05 per unit
    Internal: 9.6" x 6.7" x 2.1"
    245 x 171 x 55 mm
    External: 10" x 7.0" x 2.4"
    254 x 180 x 63 mm
    Material: Polycarbonate
  23. German-made knockout-box from Polycase
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    SK-29 Enclosure with Knockouts
    As low as $31.41 per unit
    Internal: 6.7" x 3.9" x 3.2"
    171 x 101 x 81 mm
    External: 7.0" x 4.3" x 3.4"
    180 x 110 x 88 mm
    Material: Polycarbonate
  24. outdoor electrical enclosure

    AMERICAN MADE | HP SERIES

    Engineered for reliability, the HP Series offers the weatherproof protection you need at a price you want. Available in black or gray, with an optional clear cover and various external mounting styles to best suit your project.

    SHOP THE HP SERIES

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