CHT QSil 40 White Silicone Potting Compound

Description

QSil 40 is a two-part, room-temperature condensation cure silicone elastomer for potting and encapsulation work. It is white, self-leveling, and designed for applications where cure speed can be adjusted with the proper catalyst package.

QSil 40 Benefits

• Self-leveling flow helps fill housings and cavities with less tool work.
• Variable cure speed lets processors tune the setup window with approved catalyst levels.
• Primer-aided adhesion supports bonding when release behavior is not desired.
• White cured color helps with visual coverage checks in electronic assemblies.
• Service range from low to high temperatures suits many industrial electronics jobs.

This material is a practical silicone choice for shops that need a general-purpose potting compound with room-temperature cure. QSil 40 is also useful when a low-stress silicone fill is preferred over a hard casting resin.

Where QSil 40 Fits

• Potting and encapsulating electronic modules, controls, and sensors.
• Filling housings that need a self-leveling silicone material.
• Low-stress protection for components exposed to thermal cycling.
• Prototype and production work using DBT or deep-section catalyst systems.
• Applications where primer selection controls whether adhesion or release is preferred.

Surface Preparation and Use

Prepare clean, dry housings and components before mixing. Remove oil, dust, release agent, solder residue, and loose particles. If adhesion is required, test the chosen primer system on actual substrates before production.

Follow the current mix instructions for the base and catalyst. The source data lists 0.5% DBT by weight or 10% deep section catalyst by weight, with cure speed adjustable by DBT additions. Confirm the cure window and fill depth on real parts.

Technical Details and Documentation

CHT data lists this material as a white condensation-cure silicone with 24 hour room-temperature cure, 100 minute gel time at 25 C, Shore A 40 hardness, 200% elongation, and UL recognition under file E205830. Review current information from CHT Group before setting a production process.

Ordering Help

For related casting and potting materials, browse Chemical Concepts encapsulants and potting compounds. For help with catalyst choice, primer use, and pack size, call (800) 220-1966 or email [email protected].