Why HEPA Filter Manufacturers Are Switching to Blue Jelly Tank Sealant Gel | Market Trend

author: Kimi

2026-08-17

Global demand for high quality two component jelly gel is growing at double digit rates, driven by cleanroom construction in semiconductors and biopharma, smart meter rollouts, and the continued expansion of intimate apparel and medical gel pad markets. Chinese manufacturers are increasingly replacing imported brands with cost effective domestic alternatives that offer comparable performance and shorter lead times.

In practice, HY-9400 is most commonly used for knife-edge gel channels of ducted HEPA filter housings in cleanroom ceilings. The product is a two component addition cure platinum catalyzed jelly gel supplied at a 1:1 mix ratio, with viscosity of 1200 to 2200 mPa.s depending on grade. After mixing and pouring, it self-levels into the gel channel and cures at room temperature into a soft, permanently tacky mass that feels similar to premium imported gels.

Compared with conventional mechanical gaskets, HY-9400 offers four distinct advantages:

It conforms to dimensional tolerances of the knife edge and channel, eliminating leak paths that gaskets cannot seal

It self-heals after the filter is lifted and reinserted, reducing consumable cost during filter replacement

It requires no compressed tooling or fastening force, lowering the structural requirement on filter housings

It can be reworked simply by topping up fresh gel, rather than tearing out an aged gasket

The recommended pour thickness for HY-9400 is 15 to 25 millimeters; thinner layers risk incomplete coverage and thicker layers waste material without improving sealing.

Engineers should also note that HY-9400 is part of an addition cure system and must be kept away from sulfur, nitrogen, phosphorus and tin contaminants such as natural latex gloves, certain PVC hoses and uncured condensation cure silicone. These contaminants can inhibit the platinum catalyst and cause sticky or uncured spots. Using dedicated tools, polyethylene or nylon gloves, and accurate 1:1 weighing by weight will deliver consistent results from the first kilogram to the two hundred kilogram drum.

Field data from three cleanroom projects showed that properly poured HY-9400 maintained leak-free performance for over five years, while sites using low cost off-spec gel developed channel leaks within 18 months.

For buyers, total cost of ownership matters more than unit price. A single 20 kilogram pail of HY-9400 typically seals 60 to 100 standard 610 by 610 millimeter HEPA filter channels, depending on channel depth. Combined with zero field leak claims and a 12 month shelf life, the return on investment is significantly better than low cost alternatives that often require rework within the first heating and cooling season.

Hong Ye Silicone supports customers with free 1 kilogram sample kits, full technical data sheets, RoHS and REACH reports, and on-site pouring guidance for volume projects. Custom colors, adjusted penetration and food-contact grade formulations are available with a minimum order of 20 kilograms, and typical lead time is 7 to 10 working days after deposit.

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