7940 Siaair 6″ Foam Sanding Disc – 600 Grit Fine Prep

The 7940 Siaair 6″ Sanding Disc (600 Grit) is the industry go-to solution for the fine sanding of primer fillers and the preparation of new body parts (E-coats). Bridging the gap between shaping and finishing, this 600 grit abrasive provides a controlled cut that effectively smoothes out texture and imperfections while leaving a surface fine enough for base coat application in many industrial contexts. Its primary strength lies in its ability to create a completely uniform, matte surface on conventional varnishes and composites without creating deep, visible scratches.

Advanced Foam Technology for Wet/Dry Use

Engineered with Siaair’s signature foam-backed technology, this disc solves the common problem of “cutting through” edges on complex shapes. The flexible foam layer distributes hand or machine pressure evenly, allowing the abrasive to float over curves, bumpers, and body lines safely. This porous foam structure is also highly effective for wet sanding, as it absorbs and retains water to lubricate the surface. This active cooling prevents heat buildup, which can otherwise cause pigtails or clog the disc when sanding softer materials.

Extended Lifespan and Consistency

Efficiency is key in professional workshops, and the 7940 Siaair delivers with a lifespan significantly longer than standard paper discs. The combination of high-grade aluminum oxide grain, a specialized resin-over-resin bond, and a breathable structure minimizes clogging (loading). This means you use fewer discs per job, reducing material waste and cost. Whether you are prepping a plastic bumper or fine-tuning a composite mold, the 7940 Siaair 600 grit ensures a consistent, high-quality finish every time.