Custom Liquid Silicone Rubber Waterproof Gasket Washer

# Custom Liquid Silicone Rubber Waterproof Gasket Washer

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Product Overview

Custom Liquid Silicone Rubber (LSR) waterproof gasket washers are precision-engineered sealing components designed to prevent water, dust, air, and other contaminants from penetrating enclosed assemblies. Manufactured at 橡楚（湖北）橡胶有限公司 (Xiangchu (Hubei) Rubber Co., Ltd.), located at 湖北省鄂州市鄂城区经济开发区凡口街道内河巷54号, these custom-molded gaskets leverage the unique material properties of liquid silicone rubber to deliver reliable long-term sealing performance in diverse operating environments.

As a specialized manufacturer of LSR products, we produce custom waterproof gasket washers tailored to exact customer dimensional and performance requirements, from low-volume prototype runs to high-volume mass production. Unlike generic off-the-shelf gaskets, our custom LSR solutions are designed to match the specific tolerances, compression set resistance, and environmental exposure demands of your application, eliminating fit gaps that compromise sealing integrity. Our gaskets maintain consistent sealing performance across extreme temperature fluctuations, resist UV degradation and chemical exposure, and retain elasticity after years of repeated compression, making them ideal for critical waterproofing applications across industrial, consumer, and automotive sectors.

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Technical Specifications

Material Properties

All our custom waterproof gasket washers are produced from 100% pure food-grade or industrial-grade liquid silicone rubber, with no recycled fillers or additives that compromise performance. Key material properties include:

Physical Performance

Our LSR waterproof gasket washers deliver consistent physical performance across all production runs, with tested parameters as follows:

Process Parameters

We use precision liquid injection molding (LIM) for all custom gasket washer production, with controlled process parameters to ensure dimensional consistency:

• Dimensional tolerance range: ±0.05 mm for features ≤10 mm; ±0.1 mm for features 10–100 mm; ±0.15% for features over 100 mm
• Minimum wall thickness: 0.3 mm (standard production); 0.2 mm available for specialized applications
• Maximum part diameter: 500 mm for single-piece molding; larger assemblies available via bonded multi-piece construction
• Standard production lead time: 7–15 working days for tooling and first article samples; 10–20 working days for mass production after sample approval

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Product Advantages

1. Long-Lasting Waterproof Sealing Performance

LSR has inherently low water absorption and a non-porous surface structure that creates a consistent, tight seal between mating components. Unlike organic rubber compounds that degrade and crack after prolonged water exposure, our LSR gasket washers retain their elasticity and sealing force for over 10 years of continuous use in wet or submerged environments, eliminating the need for frequent maintenance and replacement.

2. Customizable to Exact Application Requirements

We support full customization of every aspect of the gasket washer, including dimensional geometry, hardness, color, and material grade. Whether you need a complex irregular shaped gasket for an outdoor electronics enclosure or a simple circular washer for plumbing connections, our precision LIM process can produce parts that match your 2D CAD drawings or 3D model files with tight tolerance control. We also offer optional post-processing, including adhesive lamination, die cutting, and surface treatment to meet specific assembly requirements.

3. Excellent Resistance to Environmental Degradation

Our LSR waterproof gasket washers resist UV radiation, ozone, humidity, and common chemicals including mild acids, alkalis, and cleaning agents. This makes them suitable for both indoor and outdoor applications where exposure to the elements would cause conventional rubber gaskets to harden, crack, or lose sealing ability. They also maintain their sealing performance across wide temperature fluctuations, working reliably in frozen outdoor environments and high-temperature industrial applications.

4. Safe for Sensitive Applications

For food and beverage, medical device, and consumer product applications, we offer food-contact and low-volatile LSR grades that meet global regulatory requirements. Unlike generic gaskets that may leach harmful additives into food or water, our LSR gaskets are non-toxic, odorless, and do not support microbial growth, making them a safe choice for sensitive use cases.

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Applications

Our custom LSR waterproof gasket washers are used across a wide range of industries for critical sealing applications:

• Consumer Electronics: Sealing for smart watches, fitness trackers, outdoor Bluetooth speakers, power banks, phone cases, and outdoor surveillance cameras, preventing water damage from rain, splashes, or submersion.
• Automotive & Transportation: Sealing for exterior lighting assemblies, battery packs in electric vehicles, door and window assemblies, sunroof systems, and engine compartment components, resisting road water, temperature changes, and automotive fluid exposure.
• Plumbing & Home Appliance: Sealing for water heaters, faucets, shower heads, water filters, and dishwashers, providing long-term leak prevention and compliance with drinking water contact regulations.
• Outdoor & LED Lighting: Sealing for outdoor LED flood lights, street lights, and garden lighting, preventing rain and dust ingress while resisting UV degradation that causes yellowing or cracking.
• Medical Devices: Sealing for wearable medical monitors, portable diagnostic devices, and waterproof medical equipment, meeting basic non-implantable device material requirements.
• Industrial Equipment: Sealing for outdoor control panels, marine equipment, chemical processing pumps, and water treatment systems, resisting environmental exposure and mild chemical contact.

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Selection Guide

Hardness Selection

Select gasket washer hardness based on your assembly compression requirements:

• 10–20 Shore A: Ultra-soft for uneven mating surfaces or applications requiring very low compression force, ideal for delicate electronic enclosures with low clamping force.
• 30–40 Shore A: Soft, good conformability to irregular surfaces, most common for general-purpose waterproof sealing applications.
• 50–60 Shore A: Medium hardness, balanced compression set resistance and conformability, ideal for automotive and plumbing applications with consistent clamping force.
• 60–70 Shore A: Hard LSR, for high-pressure applications or gaskets that require high structural rigidity, suitable for heavy industrial sealing.

Size Specifications

We accept fully custom dimensional requirements:

• Standard circular washers are available in inner diameters from 2 mm to 400 mm and outer diameters from 4 mm to 500 mm, with thicknesses from 0.5 mm to 10 mm.
• For irregular non-circular gaskets, we can produce any geometry based on your 2D CAD drawing or 3D STEP/IGS file, with no extra tooling fees for simple geometry adjustments.
• We provide free first article inspection reports for all custom orders to verify dimensional compliance before shipment.

Material Grade

Select the appropriate material grade based on your application:

• Industrial Grade: For general industrial, automotive, and outdoor lighting applications that do not require food contact, balances performance and cost-effectiveness.
• Food-Grade LSR: Compliant with FDA food contact standards, suitable for plumbing, food processing equipment, and small kitchen appliances.
• Low-odor Low-volatile LSR: For consumer electronics and indoor applications that require low VOC emissions.

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Quality Assurance

At 橡楚（湖北）橡胶有限公司, we operate our manufacturing facility under an ISO 9001 certified quality management system, with strict quality control checks at every stage of production: from incoming raw material inspection to in-process dimensional checks and final pre-shipment quality verification. All raw materials are sourced from reputable LSR suppliers with full material test reports, and every production batch undergoes compression set, hardness, and visual inspection to ensure compliance with agreed specifications.

We provide full material certification and test reports for all custom orders upon request. If you have questions about product selection, require a custom quote, or would like to discuss your specific application requirements, contact our team:

• Address: 湖北省鄂州市鄂城区经济开发区凡口街道内河巷54号
• Phone: +86 18071171144
• Email: churubber@163.com