Q-Cells are microscopic, hollow glass microspheres used as a lightweight filler in marine and composite applications. They are added to resin systems—typically epoxy, polyester, or vinyl ester—to create fairing compounds and low-density putties that are easy to sand and shape.

Both are lightweight fillers for fairing, but Q-Cells are made from hollow glass, which makes them slightly harder and more moisture-resistant than phenolic microballoons. Q-Cells may be slightly more difficult to sand but offer better compressive strength.

To achieve a peanut butter-like consistency for troweling or fairing, mix approximately 2 parts Q-Cells to 1 part resin by volume. Adjust as needed depending on the desired thickness and application.

No. Q-Cells are intended for fairing and cosmetic work, not for structural bonding. If strength is required, consider blending Q-Cells with a high-strength filler like colloidal silica or chopped fiberglass for reinforcement.

Yes, Q-Cells create a fairing mix that is lightweight and easy to sand—one of their main advantages. This makes them a favorite among boatbuilders for final surface prep before painting.

Yes, Q-Cells are compatible with epoxy, polyester, and vinyl ester resins. They are extremely versatile for a wide range of applications in fiberglass and composite work.