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Premium Waterproof Isobar Hats
Engineered for Reliability

YUYAO JOYWEE ELECTRICS CO., LTD. has been a trusted manufacturer since 2007, delivering high-performance waterproof junction caps, pressure line caps, and electrical enclosures with superior durability and long-term insulation.

Waterproof Isobar Hat Product
Factory or Product Detail

About YUYAO JOYWEE

Founded in 2007, Yuyao Jiaowei Electric Appliance Co., Ltd. specializes in the design and manufacturing of high-quality waterproof electrical components. Our core products include waterproof junction caps, pressure line caps, and junction boxes filled with high-vacuum insulation silicone resin — a formulation that remains non-curing and crack-resistant for long-term reliability.

We are committed to excellence in engineering and material science, ensuring every product meets rigorous standards for tensile strength, waterproof performance, and durability. Our waterproof isobar hats are trusted by industrial and commercial clients worldwide.

5+ Years

Quality Guarantee

2007

Founded

Our Products

Discover our range of waterproof electrical enclosures and connectors, designed for maximum durability and safety in harsh environments.

Waterproof Isobar Hat JW1030

Waterproof Isobar Hat

Model: JW1030

Product No.: JW1000

  • • High-vacuum silicone insulation
  • • Non-curing & crack-resistant
  • • Tensile strength: >8kg (soft wire)
Waterproof Junction Cap

Waterproof Junction Cap

Model: JW2000 Series

  • • Sealed for IP68 rating
  • • Resistant to UV & extreme temps
  • • Ideal for outdoor wiring
Pressure Line Cap

Pressure Line Cap

Model: JW-PLC50

  • • Reinforced joint structure
  • • Hard wire tensile >12kg
  • • Flame-retardant housing
Electrical Junction Box

Junction Box Enclosure

Model: JB-300

  • • Weatherproof ABS construction
  • • Internal silicone sealing
  • • Mounting brackets included
Isobar Connector Animation

Isobar Connector Set

Model: ISB-10

  • • Multi-wire compatibility
  • • Color-coded terminals
  • • Quick-install design
Industrial Waterproof Cap

Industrial Waterproof Cap

Model: IWC-75

  • • Heavy-duty polymer shell
  • • Corrosion-resistant contacts
  • • Suitable for marine use
Silicone-Filled Enclosure

Silicone-Filled Enclosure

Model: SFE-200

  • • Vacuum-sealed silicone core
  • • Prevents moisture ingress
  • • 5-year performance warranty
Mini Waterproof Cap

Mini Waterproof Cap

Model: MWC-10

  • • Compact design for tight spaces
  • • Soft wire tensile >8kg
  • • Easy twist-lock mechanism
Outdoor Electrical Connector

Outdoor Electrical Connector

Model: OEC-50

  • • UV-stabilized housing
  • • Wide temperature range (-40°C to +105°C)
  • • Reusable seal
Heavy-Duty Junction Box

Heavy-Duty Junction Box

Model: HDJB-400

  • • Reinforced polycarbonate
  • • Multi-entry ports
  • • Grounding terminal included
View Full Catalogue

Why Choose Joywee?

Superior Waterproofing

IP68-rated seals and vacuum silicone insulation ensure complete protection against moisture and dust.

High Tensile Strength

Soft wire joints withstand >8kg pull; hard wire joints exceed 12kg for secure, long-lasting connections.

5-Year Warranty

We stand behind our products with a comprehensive five-year quality guarantee.

Patented Designs

Multiple utility model patents protect our innovative engineering and performance.

2007

Founded

50+

Global Clients

15+

Patents

10M+

Units Delivered

Frequently Asked Questions

What is a waterproof isobar hat?

A waterproof isobar hat is a protective electrical connector cap designed to seal wire junctions from moisture, dust, and environmental damage. It uses internal silicone resin to create a vacuum seal that remains flexible and crack-free over time.

What materials are used in Joywee products?

Our products use high-vacuum insulation silicone resin (non-curing), UV-resistant ABS or polycarbonate housing, and corrosion-resistant metal contacts to ensure long-term performance.

Do you offer custom designs?

Yes, we support OEM/ODM services. Contact us with your specifications for tailored solutions.

What is the warranty period?

All Joywee products come with a 5-year quality guarantee against manufacturing defects.

Are your products certified?

Our manufacturing processes follow international quality standards. Specific certifications available upon request.

Get in Touch

For inquiries, quotes, or technical support, visit our official website to reach our team directly.

Visit Official Website

Head Office

No.105 Hujia, Jiulei Hill
Yuyao, Zhejiang, China

Contact Info

Tel: 135 8693 3029

Fax: 0574-62605789

Email: info@joywee.cn

QQ: 741230299

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