Gator 4240 Waterproof Sandpaper 320 Grit 9x11 in 25-pack

Product Description

The GATOR 4240 is a waterproof abrasive sheet designed for wet sanding between coats of paint, sealer, varnish, and other surface finishes. Each sheet measures 9 inches x 11 inches and carries a 320 grit rating, placing it in the very fine abrasive range. A resin bond coating holds the abrasive mineral to the backing more durably than standard glue-bond construction, extending sheet life through repeated wet passes. This product is sold in a 25-sheet box. It is suited for finishing work performed by painters, body shop technicians, woodworkers, and finishing tradespeople who require consistent cut and surface uniformity between coats.

These sheets are used in wet sanding applications where water or a lubricant is applied to the work surface to reduce loading and improve finish quality. Typical use cases include scuff sanding between primer and topcoat layers, leveling sealer coats on wood or metal, and preparing surfaces for final finish on cabinetry, automotive body panels, and trim work. The 320 grit level is appropriate for intermediate and final passes where a smooth, even surface profile is required before the next coat or final inspection.

Key Features

• 320 grit very fine abrasive rating for intermediate and finish-pass sanding
• Waterproof construction supports wet sanding with water or compatible lubricants
• Resin bond coating provides longer sheet life compared to standard glue-bond sandpaper
• Standard 9 inches x 11 inches sheet size fits most hand sanding blocks and pad sanders
• 25 sheets per box for job-site or shop stock

Compatibility

Designed as a general-purpose wet sanding sheet for use with paints, sealers, varnishes, and surface finishes on wood, metal, and primed substrates.

Installation Notes

No power tools or fasteners are required for standard hand sanding use. When using with a sanding block or orbital pad, confirm sheet size compatibility before cutting. Keep work area and sheet wet throughout the sanding pass to prevent loading and reduce surface scratching. Dispose of used sheets according to local regulations if sanding materials contain lead-based paint or hazardous coatings.

Technical Specifications

• Grit: 320 Very Fine
• Sheet Dimensions: 9 inches x 11 inches
• Pack Quantity: 25 sheets
• Weight: 0.78 pounds
• Backing: Waterproof
• Bond Type: Resin coating
• Unit of Measure: Box

Standard Information

• Brand: GATOR
• Manufacturer Part Number: 4240