Sandpaper sheet GEKO G78491 230x280 mm P800 waterproof (50/1000)

GEKO sandpaper sheet G78491 is a waterproof abrasive sheet measuring 230×280 mm with P800 grit suitable for fine sanding, surface finishing and preparation prior to polishing or recoating. Supplied in packs indicated as 50/1000, the sheet is designed for use both by hand and with sanding machines on a range of substrates including paint, primer, metal, wood and filler. Its waterproof construction allows wet or dry sanding to minimise dust and achieve a smoother result on delicate finishes.

Advantages

The P800 grit offers a fine abrasive action that effectively removes minor imperfections, sanding marks and light oxidation while preserving the substrate profile. The waterproof backing permits wet sanding to reduce dust, extend abrasive life and produce a consistent, clog-resistant surface. Sheets of 230×280 mm are compatible with common sanding pads and holders, providing good coverage for flat and contoured areas. The product’s uniform grit distribution ensures predictable results and repeatable surface preparation for subsequent painting or polishing stages.

Suitable for

• Sanding and finishing painted surfaces and primers
• Preparing metal surfaces before polishing or coating
• Smoothing wood and filler prior to final finishing
• Fine deburring and blending of joints and seams
• Wet sanding to achieve glossy, defect-free surfaces

Key specifications

• Sheet dimensions: 230 × 280 mm
• Abrasive grit: P800 (fine)
• Suitable for wet and dry sanding
• Compatible with manual and machine sanding
• Intended uses: paint, primer, metal, wood, filler

How to use

Select the appropriate backing or sanding block that fits the 230×280 mm sheet and secure the sheet evenly to avoid creasing. For dry sanding, use light, even pressure and move the sheet along the surface in overlapping strokes. For wet sanding, immerse or spray the surface with water to lubricate the abrasive; frequently rinse the sheet to remove debris and maintain cutting performance. Replace the sheet when abrasive efficiency decreases or when the surface finish meets the required standard. After sanding, clean the surface from residues before applying primer, paint or polish.

Usage recommendations

Use P800 grit for final smoothing prior to polishing or applying clear coats; combine with coarser grits for faster material removal and finer grits for final polishing. When wet sanding, maintain a thin film of water and change sheets if they clog or tear. Store sheets flat in a dry place to preserve their waterproof backing and abrasive performance.