Silicone product

Buyers must distinguish between Industrial Grade, Food Grade (FDA/LFGB), and Medical Grade silicone. For kitchenware or baby products, LFGB (European standard) is generally stricter than FDA (US standard) as it requires more rigorous testing for volatile organic compounds. Always request a Material Safety Data Sheet (MSDS) to verify the raw material source.

Perform the 'Stretch Test' or 'Twist Test': if white streaks appear when the silicone is twisted, it likely contains cheap fillers (like calcium carbonate), which reduce heat resistance and longevity. High-quality 100% food-grade silicone will maintain its color. Additionally, check for shore hardness (Durometer); most consumer goods range between 30A to 70A depending on the required flexibility.

Compression Molding is the most common and cost-effective for simple shapes and medium volumes. For high-precision, high-volume, or complex designs, Liquid Silicone Rubber (LSR) Injection Molding is superior, offering faster cycle times and tighter tolerances, though the initial mold cost is significantly higher.

Ensure products comply with REACH and RoHS for chemical safety in the EU. For products contacting food, FDA 21 CFR 177.2600 (USA) or Regulation (EC) No 1935/2004 (EU) certifications are essential. If sourcing for children, EN71 or CPSIA testing is mandatory to ensure the absence of phthalates and heavy metals.

Strong odors are often caused by residual vulcanizing agents from insufficient post-curing. Stipulate in your contract that products must undergo a secondary sulfurization (post-cure) process for at least 4 hours at 200°C. This ensures the removal of volatile residues and stabilizes the material.

Focus on the weight of the product and the current market price of raw silicone rubber. Since material costs account for a large portion of the unit price, negotiating based on gram weight and mold cavity efficiency is more effective than arbitrary discounting. Ask for a breakdown of material cost vs. processing cost.

Silicone is prone to permanent deformation if compressed for long periods. Ensure the supplier uses reinforced five-layer corrugated boxes and avoids over-stacking. For very soft items, specify the use of internal dividers or individual polybags to prevent items from sticking together due to static electricity.

Always use Secured Trading Services provided by Made-in-China.com to protect your payment. Never pay the full amount upfront; a standard 30% deposit and 70% balance after third-party inspection (PSI) and before shipment is the industry benchmark for risk mitigation.