Blue Hospital Operating Room HEPA Gel Seal | Low Viscosity Fast Flow Grade Two Component Tank Sealant Jelly Gel

Key Features:

• Excellent electrical insulation with dielectric strength above 20 kV/mm

• Low oil-bleed refined formulation prevents contamination of filters, fabrics and skin

• Permanently tacky surface that self-heals after filter removal and reinsertion

• No VOC emissions during or after cure, suitable for enclosed cleanroom and medical environments

• Repairable and reworkable: old gel can be topped up with fresh gel without full removal

• No corrosive by-products, fully compatible with aluminum, stainless steel, ABS, PC and PP

• RoHS and REACH compliant; food-contact and skin-safe formulations available on request

• Customizable blue or transparent color, penetration from 120 to 260 (0.1mm), and tack level

• Two-component addition-cure platinum catalyzed silicone system, no condensation by-products

• Compatible with automated meter-mix dispensing equipment for high-volume production lines

• Recommended model: HY-9400 - Blue high tack tank sealant jelly gel

Technical Parameters:

Detailed Application Scenarios:

Biological safety cabinet and pharmaceutical GMP cleanroom users value HY-9400 for its zero-VOC, low-odor and particle-free characteristics. Because the gel cures into a non-dusting, non-fiber-releasing mass, it does not introduce contamination into controlled environments. It also withstands repeated wipe-downs with isopropyl alcohol, hydrogen peroxide and quaternary ammonium disinfectants without swelling, cracking or losing tack. Field data from hospital pharmacy IV admixture rooms and vaccine filling lines show gel channels poured with HY-9400 remain leak-free through more than five years of quarterly filter changes and annual certification testing.

For semiconductor, display panel and lithium battery dry rooms, even a microscopic bypass leak around a HEPA filter can ruin a production batch by introducing moisture or particulates. HY-9400 addresses this with its ultra-low hardness (penetration 200) and high conformability, which allow it to fill every microscopic scratch, weld mark and tolerance gap on the knife edge and channel surface. Its low linear shrinkage of less than 0.1 percent ensures the gel does not pull away from the channel walls after cure, and its -60C to 200C service range covers both cold-air lithium dry rooms and hot ceiling plenum environments.

Application & Operating Instructions:

Step 1 Surface preparation: Clean the gel channel with a dry lint-free cloth. Remove all oil, water, rust, latex residue and old cured silicone fragments. For new filter housings, wipe with isopropyl alcohol and allow to fully dry.

Step 2 Component B preparation: Before each use, stir component B thoroughly for at least 2 minutes. The blue pigment and catalyst can settle during storage; incomplete stirring causes color variation and soft or uncured spots.

Step 3 Weighing and mixing: Weigh A and B at exactly 1:1 by weight using a calibrated scale. Pour into a clean mixing container and stir slowly for 3 to 5 minutes, scraping the sides and bottom regularly. Avoid fast stirring which introduces bubbles.

Step 4 Pouring: Pour the mixed gel slowly along one end of the channel and allow it to self-level to a depth of 15 to 25mm. Do not pour from a height to avoid air entrapment. For long channels, pour in sections.

Step 5 Curing: Allow 4 to 6 hours at 25C before installing the HEPA filter. Full physical properties develop after 24 hours. No vacuum degassing is required.

Step 6 Contamination prevention: 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 can inhibit the platinum catalyst and prevent cure.

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.

FAQ:

Q: Does the gel require vacuum degassing before pouring?

A: For HEPA filter sealing, meter potting and most industrial applications, no vacuum degassing is needed. The gel is formulated to self-level and release air naturally. For crystal-clear bra pads and breast forms where optical clarity is critical, we recommend vacuum degassing at -0.08 to -0.09 MPa for 2 to 3 minutes after mixing.

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: 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.

Q: How long does the gel take to cure and can I speed it up?

A: At 25C the gel reaches touch-dry in 4 to 6 hours and full properties after 24 hours. For mass production, heat-curing at 60 to 80C reduces demolding time to 30 to 60 minutes. Do not exceed 100C as it may cause discoloration or surface defects. Low temperatures below 15C will significantly slow the cure.

Q: What causes incomplete cure or sticky spots and how can I prevent it?

A: Incomplete cure is almost always caused by contamination or off-ratio mixing. The most common contaminants are sulfur (found in natural latex gloves and some rubbers), nitrogen compounds (amines), phosphorus, tin-cured silicone and certain PVC products. These inhibit the platinum catalyst. Prevention: use nitrile or PE gloves, dedicated clean tools, accurate 1:1 weighing, and stir component B thoroughly before mixing.