This premium silicone hoop seal is a high-resilience circumferential gasket specifically engineered for the outer clamping rings, dome closures, and cable entries of telecommunication junction boxes. Designed to provide absolute environmental isolation, it ensures the stable, uninterrupted transmission of fiber optic network signals by forming an impenetrable barrier against water, dust, corrosion, mold, and bacterial growth.
Why Source Our Custom Silicone Hoop Seals?
- Certified UL94 V-0 Flame Retardancy: Formulated from premium flame-retardant silicone compounds that effectively suppress flame spread post-curing, meeting the strict safety protocols of global telecom networks.
- IP68 Watertight Protection: The heavy-duty compression-type silicone ring achieves a certified IP68 rating. Operating flawlessly from -40°C to +80°C, it completely blocks moisture ingress and eliminates fiber attenuation risks in extreme climates.
- Engineered for High Clamping Stress: With a tensile strength of ≥ 2MPa and an elongation rate of 50%–150%, this gasket maintains excellent structural stability and elasticity under severe mechanical hoop pressure without deforming.
- Zero Signal Interference: Features a volume resistivity of ≥ 1×10¹⁴ Ω·cm and a breakdown voltage of 18–20kV/mm, ensuring complete electromagnetic insulation for critical communication infrastructure.
Technical Specifications
| Key Parameter | Specifications & Capabilities (Fully Customizable) |
| Product Name | Custom Silicone Hoop Seal / Circumferential Gasket |
| Material Base | 100% High-Grade Silicone Compound |
| Flame Retardant Grade | UL94 V-0 (Certified) |
| Ingress Protection Rating | IP68 Waterproof & Dustproof |
| Hardness (Shore A) | Shore A 20 ~ 60 (Adjustable up to 70±2A based on design) |
| Tensile Strength | ≥ 2 MPa |
| Elongation at Break | 50% ~ 150% |
| Volume Resistivity | ≥ 1×10¹⁴ Ω·cm |
| Breakdown Voltage | 18 – 20 kV/mm |
| Color Matrix | Grey, White, Red, Yellow, Green, or Custom Pantone Match |
| Dimension Accommodation | Supports custom sizing for specific pipe/conduit diameters (e.g., 50mm / 110mm) |
| Sales Model & MOQ | Wholesale / B2B OEM Only; Minimum Order: 1,000 pcs |
Typical Application Scenarios
Electronic Component Fixation & Bonding: Highly effective for the flame-retardant encapsulation of high-power circuit board capacitors, inductors, shell frames, and housing gaps.
Telecom Fiber Optic Cable Junction Boxes: Perfect for sealing cylindrical dome splice closures and protecting fiber fusion joints. Designed to work seamlessly with standardized fiber bending radii (≥ 40mm) to minimize signal loss.
Heavy Outdoor Infrastructure: Tailored for underground direct burial, overhead lines, and pipeline installations exposed to heavy rain, sustained high humidity, and massive temperature fluctuations.
