CHT QGel 311 Fast Cure Silicone Gel Encapsulant

Description

The CHT QGel 311 encapsulant is a clear, fast-cure silicone gel for protecting electronics from vibration, moisture, and thermal or mechanical shock. It cures into a soft but resilient, moderately cross-linked silicone polymer that cushions components without locking them into a hard block. The 1:1 mix ratio is designed for automatic mixing and dispensing, and the cure profile gives shops a choice between a 90 minute room-temperature cure and a 5 minute heat cure at 150 degrees C.

Where this encapsulant fits

QGel 311 is a good fit when an electronics build needs the feel and stress relief of silicone gel but cannot wait through a long overnight cure. LED modules, sensor packages, small housings, communication devices, and protected circuit areas can all benefit from a clear gel that lets operators see the fill after cure. The 1:1 ratio also simplifies machine setup compared with high-ratio systems, especially on lines already built around dual-cartridge or meter-mix dispensing.

The gel is useful where movement control matters. It surrounds solder joints, wires, connectors, and small board components with a compliant body that helps damp vibration and absorb shock. Since the cured product remains soft, it can reduce stress that might otherwise build between the electronic part, housing, and potting material during temperature changes.

How QGel 311 supports faster production

Before dispensing, confirm that the assembly, housing, and fixture can handle the selected cure path. Room-temperature cure gives a more forgiving process window for small runs or field-style work. Heat cure can shorten the cycle when parts tolerate the oven temperature and the line needs faster movement from fill to handling. In either case, clean parts, consistent dispense volume, and controlled air release help produce better results than simply filling the cavity as fast as possible.

Automatic mixing and dispensing are especially helpful on repeated parts. A stable 1:1 process reduces ratio drift, keeps fill depth predictable, and limits manual mixing variation. For prototypes, document the fill volume, cure schedule, and inspection criteria before handing the process to production.

encapsulant specifications

Order QGel 311 when a clear silicone gel must support faster handling than a slower cure system. Browse related casting and potting compounds for other electronics potting materials. For broader silicone material information, visit CHT Group.

Need Help?

Need help choosing between room-temperature cure, heat cure, or a different gel system for your assembly? Call (800) 220-1966 or email [email protected].