1 Gallon Q Cells Microspheres - A lightweight sandable filler used for making a lightweight sandable filler when blended with resin. Glass micro-sphere are used as sandable putty when blended with resin. Use to fill fabric weave, shallow blisters, and surfaces of core materials. The average bubble is less than 70 microns, about a quarter of a grain of salt. It is this small particle size which makes the paste so easy to spread evenly. Item: 2210

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