Customized liquid silicone charging plug produced by Xiangchu Rubber, with excellent waterproof sealing performance, good resilience and aging resistance, fits charging ports of various electronic devices. We support customization of color, size and hardness, complying with ISO 9001 quality control requirements.
Material
Industrial LSR
Hardness
Shore A 30-50
Temperature
Certifications
Applications
-40°C ~ +150°C
Colors
Black, White, Transparent, Customizable
# Waterproof Liquid Silicone Charging Port Plug
A Waterproof Liquid Silicone Charging Port Plug (or "charging塞") is a precision-molded flexible seal designed to block dust, moisture, water splashes, and debris from entering the exposed charging port of portable electronic devices. Manufactured at 橡楚（湖北）橡胶有限公司 from high-purity medical-grade liquid silicone rubber (LSR), this product delivers consistent sealing performance while maintaining the soft, non-abrasive touch properties that protect delicate port connectors from scratches and damage.
Unlike rigid plastic plugs or low-cost general rubber alternatives, our LSR charging port plugs are molded through precision injection molding to achieve tight, form-fitting dimensions that stay securely in place during daily use, outdoor activities, and travel. Our plugs retain their elasticity and sealing performance across a wide range of temperatures, making them suitable for everything from daily city commuting to wilderness outdoor recreation. As a specialized LSR product manufacturer based in 湖北省鄂州市鄂城区经济开发区凡口街道内河巷54号, we focus on consistent quality and customizable designs to match the unique port dimensions of different device models.
Our charging port plugs are produced from 100% virgin food-grade/medical-grade liquid silicone rubber, with no recycled filler material added. Key material properties include:
Finished charging port plugs meet the following performance standards:
All our charging port plugs are manufactured via precision liquid silicone injection molding with the following process controls:
Our LSR material’s inherent low surface energy and high elasticity allow the plug to conform to minor dimensional variations in charging port interiors, creating a continuous watertight and dust-tight barrier. This prevents water damage from accidental splashes, rain, or dust buildup that can cause poor charging connection or short circuits over time. Unlike cheaper rubber alternatives that harden and lose compression resistance after months of use, our addition-cured LSR maintains low compression set for consistent sealing performance for years.
Liquid silicone rubber has a soft, smooth surface that will not scratch the electroplated or painted edges of device charging ports, nor will it damage delicate connector pins inside the port. Our material is inert, non-toxic, and free of phthalates, BPA, and other harmful additives, so it is safe for frequent skin contact during daily carry and use. It also resists oil, sweat, and common cosmetic product residues, making it easy to clean and maintain.
As a specialized LSR manufacturer, we can produce charging port plugs in custom dimensions, hardness, and colors to match any portable electronic device, from smartphones and smartwatches to rugged outdoor tablets and action cameras. We can also add integrated pull tabs, custom logos, or surface textures to meet customer branding or usability requirements. Our precision injection molding process ensures consistent part-to-part dimensional accuracy even for large bulk orders.
Our LSR charging port plugs perform reliably across extreme temperature and humidity conditions, making them suitable for use in cold winter environments, hot summer outdoor activities, and high-humidity tropical climates. They resist degradation from ozone, UV exposure, and common chemical contaminants, so they do not crack, become brittle, or leach harmful substances over extended use.
Waterproof liquid silicone charging port plugs are used across a wide range of consumer and industrial electronic applications:
Hardness is selected based on application and fitting requirements:
We produce standard sizes for common device port types including USB-C, Micro-USB, Lightning, and custom dimensions for proprietary port designs. When placing an order, please provide the exact internal length, width, and depth of your target charging port to ensure we manufacture a plug with the correct interference fit for reliable sealing.
We offer two standard material grades to match different application requirements:
At 橡楚（湖北）橡胶有限公司, we maintain a complete quality management system certified to ISO 9001, with strict quality control checks implemented at every stage of production: from incoming raw material inspection to in-process dimensional testing and finished product performance verification. Every batch of charging port plugs undergoes visual inspection for defects, dimensional checking, and compression set testing to ensure compliance with our specifications before shipment.
We source all liquid silicone rubber raw materials from reputable global suppliers, and we never use recycled or low-grade filler material to cut costs, ensuring consistent material performance across all production batches. For custom orders, we provide pre-production sample testing to confirm dimensional fit and performance meets customer requirements before full-scale production.
If you have questions about our Waterproof Liquid Silicone Charging Port Plug or would like to request a custom quote, please contact us at:
