Gel Sealing for Fan Filter Units and Laminar Flow Clean Bench

1 Introduction
Fan filter units (FFUs), laminar flow clean benches, biosafety workstations and equipment minienvironments use small HEPA or ULPA filters sealed into compact housings to deliver localized ISO-class clean air. These units are produced in relatively small batches and serviced in place by lab and facility teams rather than on high-speed lines. Hong Ye HY-9400 is easy to handle in 1kg trial kits and 5kg kits: technicians stir component B, weigh A and B 1:1, and pour the self-leveling gel into the narrow perimeter channel, where it flows into thin sections without vacuum degassing and cures in 4-6 hours at room temperature. During periodic certification and filter changes, the permanently tacky gel self-heals around the new filter knife edge, so bench owners avoid the cost and downtime of replacing gaskets. The blue pigment gives immediate visual confirmation of fill level in the small channels.

2 Product Requirements
FFU and clean bench sealing requires: easy flow into narrow compact channels; room-temperature cure without vacuum equipment; self-healing during field filter changes; zero VOC and non-dusting for lab environments; blue visual fill check; small-kit packaging with clear instructions; and ISO/cGMP-appropriate documentation.

3 Corresponding Product Model Parameters
Recommended model: HY-9400 - Blue high-tack grade for HEPA/ULPA filter gel channels and cleanroom seals


4 Frequently Asked Questions
Q: Can small channels be filled without a dispensing machine?
A: Yes. The 1:1 mix and self-leveling flow allow manual pour into narrow FFU and clean-bench channels with no vacuum or dispensing equipment.
Q: Does the gel need replacing during filter changes?
A: No. The permanently tacky gel self-heals around each new filter; crews replace only the filter media.
Q: What packaging suits small labs?
A: 1kg kits (500g A plus 500g B) and 5kg kits suit small batch and maintenance use, with COA and RoHS/REACH documents included.

5 Quality Assurance & Certification
Every batch of Hong Ye HY-94 series jelly gel is produced under ISO 9001 certified quality management and tested for viscosity, mix ratio, cure time, penetration, color and tack before release, with a Certificate of Analysis (COA) shipped with every order. Standard grades carry RoHS 2.0 and REACH SVHC test reports; skin-contact and baby-care grades can be supplied with FDA 21 CFR 177.2600 and LFGB Section 30/31 reports and, on request, ISO 10993 biocompatibility testing. Flame-retardant grades meet UL94 V-0. Hong Ye has supplied jelly gel to contractors and manufacturers in over 60 countries since 2005, with batch traceability and multi-language documentation supporting customer qualification and tender processes.


6 Conclusion
The market for tank sealant jelly gel in this application area continues to expand as cleanroom construction, electronic encapsulation, automotive electrification, energy storage and consumer product manufacturing drive demand for reliable two-component addition-cure silicones. Hong Ye supports this growth with ISO 9001 certified production, 500-plus ton monthly capacity, complete compliance documentation and responsive application engineering. Buyers evaluating suppliers should prioritize batch consistency, documentation completeness and technical service responsiveness over unit price alone, as the cost of a sealing or potting failure far exceeds the incremental cost of a quality gel.