About Us
Shenzhen Hong Ye Jie Technology Co., Ltd (brand: HONG YE SILICONE) is a science and technology enterprise engaged in the production, R&D and sales of silicone rubber. Established in 1998, we set up Hong Kong Hong Ye Ltd., Shenzhen Hong Ye Jie and Huizhou Hong Ye Jie Technology Co., Ltd factories and other affiliated enterprises in 2005. Today we are recognized as a professional silicone rubber manufacturer, producing high quality silicone rubber products in a wide variety of RTV-2 silicone rubber, HTV silicone rubber, LSR and more. We were a major exporter of liquid silicone rubber in China in 2014, exporting to Southeast Asia, Europe, the Americas and across 7 continents. Our silicone rubber is well-received by customers from more than 138 countries and regions.
Product Overview:
Hong Ye HY-9405 is a two-component addition-cure medium-tack blue jelly gel formulated for instrument, meter and electronic encapsulation where balanced flow, waterproof protection and serviceability are all required. With a penetration of 170 plus or minus 30 (0.1mm), HY-9405 is firm enough to hold components in place during thermal cycling yet soft enough to absorb vibration and relieve stress on delicate solder joints and ceramic capacitors. The 1:1 mix ratio, 1800 mPa.s viscosity and 4 to 6 hour room temperature cure make it equally suitable for manual bench work and automated dispensing in high-volume meter, sensor and automotive electronics manufacturing. As a cost-effective standard grade, this variant offers proven performance at a competitive price for high-volume production. It is specifically formulated for low-stress encapsulation of sensitive automotive transmission control units, where decades of field experience have shown that the seal must remain soft, tacky and compliant through thousands of hours of thermal cycling, vibration and maintenance operations. Backed by Hong Ye's nearly 20 years of silicone manufacturing expertise and supplied to customers in over 60 countries, HY-9405 combines the performance of premium imported gels with the cost efficiency, short lead time and responsive technical support of a Chinese manufacturer. Whether you are sealing a single biosafety cabinet or outfitting a 100,000-square-meter semiconductor fab, HY-9405 delivers consistent batch-to-batch quality, comprehensive documentation and application engineering support from first sample through full production ramp.
Key Features:
• No corrosive by-products, fully compatible with aluminum, stainless steel, ABS, PC and PP
• Customizable blue or transparent color, penetration from 120 to 260 (0.1mm), and tack level
• Self-leveling after pouring, no vacuum degassing required, saving process time and equipment
• Permanently tacky surface that self-heals after filter removal and reinsertion
• Technical support including on-site pouring guidance and custom formulation development
• Wide operating temperature range from -60C to 200C with stable physical properties
• 1:1 mix ratio by weight, easy to meter with manual or automated dispensing equipment
• Anti-yellowing grade available for transparent products requiring long-term clarity
• Two-component addition-cure platinum catalyzed silicone system, no condensation by-products
• RoHS and REACH compliant; food-contact and skin-safe formulations available on request
• Recommended model: HY-9405 - Blue medium tack tank sealant jelly gel
Technical Parameters:
|
Model |
Color |
Viscosity (mPa.s) |
Operation Time (min) |
Cure Time (hr) |
Penetration (0.1mm) |
Tack |
Mix Ratio |
Density (g/cm3) |
|
HY-9400 |
Blue |
1200+/-300 |
20-40 |
4-6 |
200+/-30 |
High |
1:1 |
0.98 |
|
HY-9405 |
Blue |
1800+/-400 |
20-40 |
4-6 |
170+/-30 |
Medium |
1:1 |
1.02 |
|
HY-9409 |
Transparent |
2200+/-400 |
20-40 |
4-6 |
150+/-30 |
Low |
1:1 |
0.96 |
Detailed Application Scenarios:
Automotive electronics manufacturers use HY-9405 for low-stress encapsulation of transmission control units, BMS modules, ADAS sensors and connector assemblies. Compared with hard epoxy potting, the soft jelly gel transfers dramatically less stress to ceramic capacitors, crystal oscillators and fine-pitch BGAs during thermal expansion and vibration. Its 4 to 6 hour room temperature cure also allows prototyping and low-volume production without investing in thermal cure ovens, while the option to heat-cure at 60C supports cycle times under one hour for high-volume lines. The gel is resistant to engine oil, transmission fluid, brake fluid and road salt.
Pressure, humidity and temperature sensor manufacturers rely on HY-9405 to protect sensitive MEMS dies and signal conditioning ASICs without affecting measurement accuracy. The low-modulus gel does not pre-load the sensing diaphragm, and its excellent dielectric properties isolate the electronics from conductive media. Vibration damping is another key benefit: analytical balances, optical benches and precision instruments potted with HY-9405 show measurable reduction in floor vibration transmission, improving weighing repeatability and optical alignment stability in laboratory and industrial settings.
Application & Operating Instructions:
Step 1 Substrate preparation: Ensure PCBs, housings and cavities are clean, dry and free of flux residue. If condensation is visible, pre-bake at 60C for 30 minutes and allow to cool before potting.
Step 2 Component B preparation: Stir component B for 1 to 2 minutes before dispensing to homogenize color and catalyst.
Step 3 Weighing and mixing: Weigh A and B accurately at 1:1 by weight. Mix thoroughly for 3 minutes, scraping container walls. For automated dispensing, use a meter-mix machine with static mixer nozzle of at least 16 elements.
Step 4 Potting: Pour or dispense directly into the cavity. The medium viscosity flows around component leads, connector pins and heat sinks without trapping air. A 2 to 4mm gel layer is sufficient for IP67 protection; deeper fills may be applied in layers if needed.
Step 5 Curing: Room temperature cure in 4 to 6 hours at 25C. For mass production, heat-cure at 60C for 30 minutes for fast demold. Allow parts to cool to room temperature before electrical testing.
Step 6 Rework: If component replacement is needed, cut and peel away the cured gel with a plastic tool. Fresh gel bonds well to clean cured gel, so simply high up the repaired area.
Model Selection Guide:
The HY-94 series offers three standard grades to cover the full range of jelly gel applications, and custom formulations are available for volume orders:
HY-9400 (Blue, High Tack, Penetration 200): The softest and most aggressive grade, designed for HEPA/ULPA filter gel seals in cleanrooms, biosafety cabinets, pharmaceutical GMP facilities, hospital operating rooms, semiconductor fabs, lithium battery dry rooms and data centers. Choose this model when maximum self-healing and conformability to knife-edge channels are the high priority.
HY-9405 (Blue, Medium Tack, Penetration 170): The balanced all-rounder for instrument meter sealing, electronic encapsulation and outdoor waterproofing. Typical applications include smart water/gas/electric meters, automotive ECUs and sensors, solar PV junction boxes, LED modules, underwater lights and pressure sensors. Choose this model when you need a combination of flowability, structural support, vibration damping and repairability.
HY-9409 (Transparent, Low Tack, Penetration 150): The premium skin-contact grade for intimate apparel and medical products. Typical applications include silicone bra pads, push-up inserts, breast prostheses, nipple covers, bridal and swimwear gel pads, orthopedic insoles and surgical positioning pads. Choose this model when clarity, dry skin feel, anti-yellowing and body-safe materials are required.
If your project requires a different penetration, color, cure speed or special certification (FDA, LFGB, UL94), contact Hong Ye technical support for a custom formulation. Custom MOQ starts from 20kg and typical lead time is 7 to 10 working days.
Recommended Application: Automotive ECU Soft Gel Encapsulation
Quality & Compliance:
Every batch of Hong Ye HY-94 series jelly gel is manufactured under ISO 9001 certified quality management and tested for viscosity, mix ratio, cure time, penetration, color and tack before release. A Certificate of Analysis (COA) is provided with every shipment. Standard grades are tested to RoHS 2.0 and REACH SVHC requirements. HY-9409 uses food-contact grade raw materials and can be supplied with FDA 21 CFR 177.2600 and LFGB Section 30/31 test reports on request. All products carry a 12 month shelf life from manufacture date when stored sealed below 25C. Hong Ye has supplied jelly gel to cleanroom contractors, meter manufacturers, intimate apparel brands and medical device OEMs in over 60 countries since 2005.
Packaging:
Standard packaging options include 1kg trial kits (500g A + 500g B), 5kg kits, 20kg pails, 25kg pails and 200kg drums. Components A and B are supplied in separate containers within each kit. Custom packaging and private labeling are available for orders above 200kg. All kits are clearly labeled with batch number, manufacture date, expiry date and safety information.
Competitive Advantages:
Hong Ye HY-9405 stands out in the global jelly gel market through a combination of formulation expertise, vertical integration and customer-focused service. Our in-house silicone polymer synthesis and compounding lines give us full control over raw material quality and batch consistency, while our 20,000-square-meter Shenzhen factory supports monthly output of over 500 tons of addition-cure silicone. This scale allows us to offer prices typically 30 to 50 percent lower than imported German Wacker and American Magna-Dyne gels without compromising on performance. We maintain local stocks of standard grades for 3 to 5 working day delivery, and our technical sales engineers are available for on-site pouring trials, gel channel design reviews and custom formulation projects. For OEM customers we provide private labeling, neutral packaging, COA documents in multiple languages and dedicated batch traceability, making it straightforward to integrate our gel into your supply chain whether you consume 20kg per month or 20 tons per quarter.
Ordering and Logistics:
To order HY-9405, contact Hong Ye sales with your required model, quantity, destination country and preferred courier. We accept T/T bank transfer, PayPal for sample orders, and Alibaba Trade Assurance for online orders. Standard packaging ships from stock within 3 to 5 working days after payment. We ship worldwide via DHL, FedEx, UPS and sea freight for bulk orders. Dangerous goods classification is not required for addition-cure silicone gel under most transport regulations, simplifying international shipping. All shipments include commercial invoice, packing list, COA and safety data sheet.
Technical Support and Customization:
Hong Ye operates a dedicated technical service team staffed by silicone chemists and application engineers with an average of more than 10 years of industry experience. We support customers throughout the entire product lifecycle: initial grade selection based on your drawings and service conditions, on-site or remote pouring trials, gel channel and mold design review, cure profile optimization, failure analysis and ongoing quality improvement. For customers with special requirements, our R&D center can develop custom formulations with adjusted penetration (120 to 260 in 0.1mm units), custom Pantone colors, accelerated or delayed cure profiles, flame retardant grades meeting UL94 V-0, thermal conductive grades, food-contact FDA and LFGB certified grades, and medical grade formulations with biocompatibility testing. Custom development typically takes 7 to 14 working days from confirmed requirements to shipped samples, and the custom formula becomes your exclusive formulation for ongoing orders. We also provide gel consumption calculation, cost-per-seal analysis and comparison testing against your current sealant to help you make data-driven sourcing decisions.
Precautions:
Use polyethylene, nylon or nitrile gloves; never use natural rubber latex gloves. Avoid contact with sulfur-containing materials, amines, phosphorus compounds, tin-cured silicone and PVC, as these inhibit the platinum catalyst and prevent cure. Mix A and B at exactly 1:1 ratio by weight using a calibrated scale. Stir thoroughly for 3-5 minutes, scraping container walls and bottom. Do not exceed 100°C during heat curing. Ensure good ventilation during operation.
Storage:
Store sealed containers in a dry, ventilated area below 25°C, away from direct sunlight, sulfur-containing materials, amines, food and strong chemicals. Shelf life is 12 months from manufacture date. Reseal unused material immediately after dispensing. Refrigerated storage at 5-15°C can extend shelf life; allow material to return to room temperature before opening to prevent condensation.
FAQ:
Q: How much gel do I need per HEPA filter or per product unit?
A: For a standard 610x610mm HEPA filter with a 15x25mm gel channel, approximately 200 to 350 grams of mixed gel is required per filter. A 20kg pail seals 60 to 100 filters. For bra pads, a typical push-up insert uses 30 to 80 grams per pair. We provide a free gel consumption calculator based on your channel dimensions or product drawings.
Q: What is the mixing ratio and how accurate must it be?
A: All HY-94 series gels use a 1:1 mix ratio by weight. Accuracy should be within plus or minus 2 percent. Off-ratio mixing causes incomplete cure, soft spots or sticky surfaces. Always use a calibrated digital scale rather than estimating by eye or volume.
Q: Can old gel in a filter tank or housing be topped up?
A: Yes. If the existing gel is still clean, soft and tacky, simply wipe the surface with a dry cloth and pour fresh gel on high. The fresh addition-cure gel bonds chemically to the clean cured gel. If the old gel has hardened, dried out, turned yellow or become contaminated, remove it completely, clean the channel, and refill.
Q: Is HY-9409 safe for direct skin contact and can you provide test reports?
A: HY-9409 is manufactured from food-contact and skin-safe raw materials meeting RoHS, REACH, FDA 21 CFR 177.2600 and LFGB requirements. It is widely used in bra pads, breast forms, nipple covers and medical positioning pads. Third-party biocompatibility, cytotoxicity and skin sensitization test reports can be provided on request for medical device qualification.
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