Salt-Spray-Resistant Gel Sealing for Marine and Offshore HVAC Filters

Commercial ships, naval vessels, FPSOs and offshore platforms operate HVAC and machinery-space ventilation systems with coalescers, moisture eliminators and HEPA filters that protect crew quarters, control rooms, engine electronics and gas detectors. The operating environment is aggressive: salt fog at 35 parts per thousand salinity, relative humidity above 95 percent, continuous engine vibration, hull flexure and installation on tilted or overhead channels. Hong Ye HY-9400 is a platinum addition-cure gel that resists salt spray and high humidity without swelling or losing tack, holds position in inclined channels through its thixotropic cured structure, and absorbs vibration and hull deflection through its soft low-modulus mass (penetration 200 plus or minus 30). The 1:1 mix cures at ambient yard temperature in 4-6 hours with no by-products and no corrosion of aluminum or steel channels, and filters changed during drydock or voyage maintenance re-seal on the same self-healing gel.

2 Product Requirements

Marine gel sealing requires: salt-fog and high-humidity resistance without swelling or tack loss; hold in tilted and overhead channels; vibration and hull-flexure absorption; flame-retardant low-smoke options for class approval; ambient cure in yard conditions; self-healing during voyage and drydock filter changes; and full traceability documentation.

3 Frequently Asked Questions

Q: Does the gel meet marine fire requirements?

A: A UL94 V-0 flame-retardant grade is available for spaces requiring class-approved fire behavior; standard grades suit non-fire-rated ventilation sections.

Q: Will salt air degrade the seal over a five-year survey cycle?

A: No. The silicone gel is salt-stable and hydrolysis-resistant; inspections between drydockings show soft, tacky seals where polyurethane would have hardened.

Q: Can filters be changed at sea?

A: Yes. The self-healing gel re-seats around replacement elements; crews carry small kits for voyage maintenance.

4 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.

5 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.