Jelly Gel for BSL-4 Sterilizer Pass-Through Seal Ports

PRODUCT OVERVIEW:

PRODUCT OVERVIEW:
Hong Ye HY-9400 is a premium two-component addition-cure platinum catalyzed blue jelly gel engineered for sealing the pass-through ports of double-door sterilizers on BSL-4 containment boundaries where waste and materials cross without breaking containment. It is designed for the gel channels around sterilizer port frames and door knife-edges, holding up against steam and moisture cycles, fumigation and repeated door operation without hardening or losing tack. As a premium anti-yellowing transparent grade, it keeps clarity and color stability after years of UV, heat and weather exposure.

KEY FEATURES:

• Premium anti-yellowing and UV-resistant formula maintains clarity and color stability through years of UV, heat and weather exposure.

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

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

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

• Can be heat-cured at 60-80C for 30-60 minutes to shorten demolding time in mass production

• Resistant to ozone, UV, moisture, salt spray and common cleanroom cleaning agents

• 1:1 mix ratio by weight, easy to meter with manual or automated dispensing equipment

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

• Third-party test reports including RoHS, REACH, FDA and LFGB available on request

• Self-leveling after pouring, no vacuum degassing required, saving process time and equipment

• Wide service temperature range from minus 60C to 200C with stable flexibility and tack

• Low exotherm and low shrinkage during cure, avoiding stress on delicate components and seals

• Soft, non-brittling cured mass absorbs vibration and impact instead of transferring it to parts and seals

• Long pot life of 20 to 40 minutes allows relaxed positioning of large or complex assemblies before gelation

TECHNICAL PARAMETERS:

DETAILED APPLICATION SCENARIOS:

Through-wall sterilizers and dunk tanks connect the containment side of a BSL-4 suite with the clean side, and the penetration around the chamber is a potential cross-contamination path. HY-9400 jelly gel is poured into the sealing trough surrounding the sterilizer pass-through to close the annular gap between the equipment body and the wall sleeve. The gel forms a continuous, flexible dam that blocks contaminated condensate and aerosols from migrating along the penetration during loading and unloading.

Pass-through seals are exposed to steam, condensate, sterilant residuals, and repeated thermal cycling from autoclave cycles. The addition-cure gel maintains its physical properties across these conditions, staying soft and tacky rather than cracking from thermal expansion of the steel chamber. Its moisture resistance prevents the seal from wicking liquid, and it tolerates the disinfectant chemicals applied to both the containment and clean-side surfaces during transfer operations.

When the sterilizer is serviced or its penetrations are re-certified, the gel trough can be emptied, cleaned, and re-poured without dismantling the wall or the equipment. The predictable working time allows a full perimeter pour to be completed before the material sets, and the cured blue seal provides a clearly defined inspection boundary for containment verification, supporting rapid return of the sterilizer to service after maintenance.This approach is equally suitable for new construction and retrofit projects where existing housings remain in good condition.

APPLICATION & OPERATING INSTRUCTIONS:

Step 1 Surface preparation: Clean the gel channel or cavity with a dry lint-free cloth. Remove all oil, water, rust, latex residue and old cured silicone fragments. For new 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 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 or cavity and allow it to self-level. Do not pour from a height to avoid air entrapment. For long channels or large cavities, pour in sections.

Step 5 Curing: Allow 4 to 6 hours at 25C before handling or assembly. Full physical properties develop after 24 hours. No vacuum degassing is required. Heat-curing at 60-80C for 30-60 minutes shortens the cycle for mass production.

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.

After the gel has fully cured, the sealed channel, cavity or enclosure is ready for service; no vacuum degassing, post-cure or special equipment is required for standard room-temperature installations. During the first 24 hours, protect freshly poured gel from dust, dripping water and contact with uncured tin-cured silicone or latex. For reliable results, first-time users are encouraged to run a small trial on a spare channel or sample cavity to confirm depth, coverage and handling time before scaling to full production. Hong Ye application engineers can review your housing or component drawings, recommend pour depth and gel grade, and provide a short mixing-and-pouring video or live online guidance for the first batch, helping line operators establish a stable, repeatable pouring process.

PACKAGING:

Standard packaging options include 1kg trial kits (500g A plus 500g B), 5kg kits, 20kg pails, 25kg pails and 200kg drums. Components A and B are supplied in separate containers within each kit, and both are clearly marked to avoid mix-up. Custom packaging, private labeling and kit configurations are available for orders above 200kg, and mixed-A/B cartridges can be prepared for cartridge dispensing. All kits are clearly labeled with batch number, manufacture date, expiry date and safety information. For export orders, packaging meets sea and air freight requirements with English labels, SDS and COA documents included. Trial orders typically ship within 1 to 3 working days, and volume orders within 7 to 10 working days depending on quantity and certification requirements.

QUALITY ASSURANCE & SUPPORT:

Hong Ye has manufactured addition-cure silicone gels in its own ISO 9001 certified facilities since 2005 and supplies customers in more than 60 countries across cleanroom, filtration, electronics and consumer product industries. Every batch of HY-9 series jelly gel is tested for viscosity, mix ratio, cure time, penetration, color and tack before release, and a Certificate of Analysis showing actual measured values ships with every order so incoming-quality teams can verify consistency on receipt. Raw-material inspection, in-process mixing control and finished-product testing form a three-stage quality system that keeps batch-to-batch variation tight for automated production. Standard grades are supported by RoHS 2.0 and REACH SVHC test reports, skin-contact and food-contact grades can be supplied with FDA 21 CFR 177.2600 and LFGB Section 30/31 reports, and ISO 10993 biocompatibility testing can be arranged on request. Our application engineers provide grade selection, sample evaluation, channel or cavity design review, on-site or video pouring guidance and after-sales follow-up, and TDS technical data sheets, SDS safety data sheets and test reports are available before order to support customer qualification, audit and tender processes. Hong Ye welcomes trial sample requests and supports customers from first sample through full volume production.

FREQUENTLY ASKED QUESTIONS:

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: Will the gel self-heal after a component is removed and reinserted?

A: Yes. The cured gel remains durably tacky and soft. When a knife edge, flange or insert is lifted, the gel temporarily separates; when reinserted, it flows back around the part within minutes, restoring the airtight or watertight seal. This self-healing property is a key advantage over compressed gaskets and foams during periodic maintenance.

Q: What is the mix ratio and how do I avoid curing problems?

A: Mix components A and B at exactly 1:1 by weight using a calibrated scale, then stir slowly for 3 to 5 minutes while scraping the container walls and bottom. Use nitrile, polyethylene or nylon gloves, never natural latex. Keep the material away from sulfur, amines, phosphorus, tin-cured silicone and PVC, which can inhibit the platinum catalyst and leave sticky or uncured spots.

Q: Can old gel in a tank, channel or housing be topped up or repaired?

A: Yes. If the existing gel is still clean, soft and tacky, wipe the surface with a dry cloth and pour fresh gel on top; the fresh addition-cure gel bonds chemically to the clean cured gel. If the old gel has hardened, dried out, yellowed or become contaminated, remove it completely, clean the channel and refill.

Q: What certifications and test reports are available for export or regulated industries?

A: Standard grades ship with a Certificate of Analysis and RoHS 2.0 and REACH SVHC reports. Skin-contact and food-contact grades can be supplied with FDA 21 CFR 177.2600 and LFGB Section 30/31 reports, and ISO 10993 biocompatibility testing on request; flame-retardant grades meet UL94 V-0. TDS, SDS and test reports are provided before order to support customer qualification and tender processes.

Q: How do I place a trial order and choose the right grade for my application?

A: Most customers start with a 1kg or 5kg trial kit to validate pour depth, cure and sealing or potting performance on the actual part. Share your application, temperature and service environment with our sales engineer and we will recommend the blue high-tack, blue medium-tack or transparent grade that fits your conditions, along with pour-depth guidance and documentation. Trial orders ship within 1 to 3 working days, and once the grade is qualified we can support volume production with stable lead times, custom packaging and private labeling for orders above 200kg.

Q: Can the gel handle the steam and heat right next to a running autoclave?