Silicone Seal: Temperature Range -60°C to 200°C

Component Specifications

Definition

A silicone-based sealing component designed specifically for junction boxes to prevent ingress of moisture, dust, chemicals, and other contaminants while maintaining electrical insulation properties and withstanding temperature variations from -60°C to 200°C.

Working Principle

Creates a compression seal between mating surfaces through elastic deformation, filling microscopic gaps to form a barrier against environmental elements while maintaining dielectric strength.

Materials

High-grade silicone rubber (VMQ) with optional additives for UV resistance, flame retardancy (UL94 V-0), and enhanced thermal stability; typically 40-80 Shore A hardness.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Hardness	50-70 Shore A
Compression Set	≤25% (22h at 150°C)
Tensile Strength	≥7 MPa
Temperature Range	-60°C to 200°C
Dielectric Strength	≥15 kV/mm
Elongation At Break	≥250%

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 3601-1, DIN 3770, UL 94, IEC 60529

Parent Products

This component is used in the following industrial products

Junction Box

A protective enclosure that houses electrical connections for photovoltaic panels.

View Product Details

Engineering Analysis

Risks & Mitigation

Compression set leading to seal failure
Chemical incompatibility causing degradation
Improper installation creating leakage paths
UV degradation in outdoor applications
Thermal cycling causing fatigue

FMEA Triads

Trigger: Insufficient compression force
Failure: Moisture ingress leading to electrical short circuits
Mitigation: Specify and verify compression requirements during installation

Trigger: Chemical exposure to incompatible substances
Failure: Seal swelling or degradation compromising barrier function
Mitigation: Material selection based on chemical compatibility charts

Trigger: Thermal cycling beyond design limits
Failure: Cracking or permanent deformation
Mitigation: Design for worst-case temperature ranges with safety margin

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±0.2mm on critical dimensions, compression force 15-25 N/cm

Test Method

IP testing per IEC 60529, compression set per ISO 815, dielectric strength per IEC 60243

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Silicone Seal

Manufacturer profiles associated with Silicone Seal.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Frequently Asked Questions

What IP rating can silicone junction box seals achieve?

Properly designed silicone seals can achieve IP68 protection when correctly installed with appropriate compression.

How long do silicone seals typically last in industrial environments?

High-quality silicone seals can last 10-15 years in standard industrial conditions, depending on temperature, chemical exposure, and UV radiation.

Can silicone seals be used with oil or chemical exposure?

Silicone has good resistance to many chemicals but may swell with certain oils; specialized formulations are available for specific chemical resistance.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Silicone Seal