High tensile silicone rubber

When selecting high tensile silicone rubber, you must prioritize Tensile Strength (typically ≥8.0 MPa) and Elongation at Break (typically ≥500%). Additionally, verify the Shore A Hardness (ranging from 30 to 80 depending on application) and Tear Strength (≥25 kN/m). For industrial applications, ensure the material maintains its properties across a temperature range of -60°C to +250°C.

Compliance depends on the end-use scenario. For food-contact or medical applications, the material must meet FDA (21 CFR 177.2600) or LFGB standards. For general industrial exports to the EU, RoHS and REACH certifications are essential to ensure the absence of hazardous substances like heavy metals or phthalates. Always request Material Safety Data Sheets (MSDS) from the supplier.

There are two primary types: Peroxide-cured and Platinum-cured. Platinum-cured silicone is superior for high-tensile requirements as it offers higher clarity, no yellowing, and no toxic by-products, making it ideal for medical and food-grade use. Peroxide-cured is more cost-effective for general industrial gaskets but may have a slight odor and lower tear resistance.

High tensile silicone is critical for dynamic sealing, vacuum membrane pressing, and high-pressure gaskets where the material undergoes constant stretching. It is also widely used in automotive turbocharger hoses and keypads where long-term fatigue resistance is required to prevent cracking after repeated actuation.

Request a Pre-Shipment Inspection (PSI) and specifically ask for a Lab Test Report from a third-party body like SGS or TUV. Ensure the sample provided matches the bulk production by using Fingerprint Infrared Spectroscopy if necessary. On Made-in-China.com, prioritize Audited Suppliers who have undergone on-site verification of their production capabilities.

Silicone prices are sensitive to raw material (siloxane) market fluctuations. Negotiate based on a formula-based pricing model linked to market indices for large contracts. For MOQs, many suppliers offer trial orders of 20kg-50kg, but significant discounts (10-15%) usually trigger at 500kg or 1-ton volumes. Always clarify if the price includes customized color matching (Pantone).

Silicone rubber is generally classified as non-hazardous for transport, but you must provide a Non-Hazardous Chemical Appraisal Report to the freight forwarder to avoid customs delays. Ensure the packaging uses heavy-duty PE bags inside reinforced cartons or drums to prevent moisture absorption and contamination during sea freight.

Utilize Secured Trading Services provided by platforms like Made-in-China.com to ensure funds are only released after proof of shipment. Avoid direct transfers to private bank accounts; always use the company’s official corporate account verified on the platform to prevent payment fraud.