UL94 Flame Rating for Jelly Gel

INTRODUCTION
Electronics and battery applications increasingly require potting and sealing materials with documented flame retardancy. UL94 is the standard plastics flammability rating: V-0 means a vertically oriented specimen self-extinguishes within 10 seconds after each of two flame applications, with no flaming drips that ignite cotton below; V-1 allows up to 30 seconds; HB is the slow-burn horizontal baseline. For energy storage battery modules, charging piles, power supplies and inverter electronics, Hong Ye HY-9405 jelly gel is available in a flame-retardant grade meeting UL94 V-0, combining the standard gel benefits, penetration 170 plus or minus 30, viscosity 1800 plus or minus 400 mPa.s, 1:1 mix, dielectric strength above 20 kV/mm and service from -60 to 200C, with self-extinguishing behavior that stops flame propagation along the potted assembly. It is important to understand that gel alone is one layer of a battery safety system that also includes cell fuses, BMS protection, pressure relief and enclosure design; V-0 gel prevents the potting mass from becoming fuel and from dripping flaming material, buying time for other protections. This article explains what V-0 means, where it is specified, and how to specify and verify flame-retardant gel.


PRODUCT REQUIREMENTS
Flame-retardant gel applications require: UL94 V-0 self-extinguishing rating with test support; no flaming drips; maintained dielectric strength above 20 kV/mm; standard gel processability (1:1 mix, room or heat cure); thermal range -60 to 200C; RoHS/REACH compliance; and batch consistency for project audits. In flame-retardant detail, the gel offers a UL94 V-0 self-extinguishing rating with test support, no flaming drips and controlled smoke density. Dielectric strength stays above 20 kV/mm, service range is -60 to 200C, and flame-retardant components do not change the 4-6 hour cure or 20-40 minute operation time. Mix viscosity suits automated lines without oil separation or corrosion; battery modules remain peelable for repair after potting, and each lot provides COA, flame records and RoHS/REACH documents for project sampling.

CORRESPONDING PRODUCT MODEL PARAMETERS
Recommended model: HY-9405 - Blue medium-tack grade for electronic potting, meter sealing, waterproofing and vibration damping

GRADE SELECTION GUIDE
The HY-94 series offers three standard jelly gel grades for liquid-channel sealing, soft electronic potting and body-contact gel products. Their color, cone penetration, tack and typical applications are described below so users can choose the grade that matches sealing force, shape retention and processing needs.
HY-9400 is a blue grade with cone penetration 200 (0.1mm) and high tack. It is mainly used in HEPA/ULPA filter gel channels and biosafety cabinet seals, and in other applications that require strong adhesion and repeatable re-sealability.
HY-9405 is a blue grade with cone penetration 170 (0.1mm) and medium tack. It is recommended for electronic potting and sensor encapsulation, and for applications that balance softness with dimensional stability.
HY-9409 is a transparent grade with cone penetration 150 (0.1mm) and low tack. It fits transparent gel pads, intimate apparel and prosthetic devices, and other applications that require visual clarity or easy repositioning.

FREQUENTLY ASKED QUESTIONS
Q: What is the difference between UL94 V-0 and V-1?
A: V-0 self-extinguishes within 10 seconds per flame application with no flaming drips; V-1 allows up to 30 seconds. Battery and power-electronics tenders commonly require V-0.
Q: Is standard jelly gel flame-retardant?
A: Silicone gel is inherently heat resistant up to 200C and does not readily burn, but the documented UL94 V-0 rating requires the dedicated flame-retardant HY-9405 grade, which should be ordered explicitly.
Q: Does V-0 gel replace battery fuses and BMS protection?
A: No. V-0 gel is one safety layer that prevents flame spread and flaming drips; cell fuses, BMS, pressure relief and enclosure design remain essential.

QUALITY ASSURANCE & CERTIFICATION
Every batch of Hong Ye HY-94 series jelly gel is produced under ISO 9001 certified quality management in a dedicated silicone workshop, with incoming raw-material inspection, in-process mixing control and finished-product testing on every batch. Before release each lot is checked for viscosity, mix ratio, cure time, penetration, color and tack, and a Certificate of Analysis (COA) listing the actual measured values ships 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. Food-contact, medical and export orders are supported by the corresponding compliance files for customer qualification. Hong Ye has manufactured and supplied jelly gel to contractors, filter builders and equipment makers in over 60 countries since 2005, with monthly capacity above 500 tons, batch traceability and multi-language documentation. Application engineers provide grade selection, sample evaluation, on-site or video pouring guidance and after-sales follow-up, and technical data sheets (TDS), safety data sheets (SDS) and test reports are available before order to support tender and audit processes.


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 are advised to look beyond unit price and compare batch-to-batch consistency, documentation completeness, delivery stability and technical service responsiveness, because the cost of a sealing or potting failure - rework, downtime, certification delay or product recall - far exceeds the incremental cost of a quality gel. Choosing the correct grade for the channel, operating temperature and service environment, following the 1:1 mixing and pouring procedure and validating with a small trial batch all help secure a durable seal. Hong Ye welcomes sample requests and application enquiries; our engineers will recommend the HY-9400, HY-9405 or HY-9409 grade that matches the sealing or potting requirement and support qualification from first sample through volume production.