This is a film-backed, fleece-backed sanding disc. The product features a 6-inch / 150mm diameter, an 8-hole dust-extraction pattern, P400 grit, a yellow polyester film backing, and a fleece-backed construction.
P400 is a medium-fine grit, typically used for smoothing sanding marks after rough grinding, primer sanding, coating leveling, pre-spray treatment, and as a preparatory step before finer grits such as P600 and P800. The P-grade grit classification belongs to the FEPA system. The ISO 6344 standard covers the grit size definitions for corundum and silicon carbide abrasive grains used in coated abrasives, with P240 to P5000 falling within the micro-powder grit range.
This P400 yellow polyester film sanding disc is designed for primer sanding, old paint refinement, pre-painting preparation, wood finishing, plastic part sanding, metal surface preparation, and composite material sanding.
P400 is commonly used for refining sanding marks, leveling primer or intermediate coats, and preparing surfaces before P600, P800, or spraying processes.
The 8-hole layout supports dust extraction when matched with compatible sanding pads and dust collection systems. It helps reduce dust accumulation during primer, paint, coating, plastic, and composite surface sanding.
P400 sanding products are commonly used for sanding mark refinement, surface preparation, dust-controlled dry sanding, and intermediate sanding processes before finer grits or painting.
P400 is mainly used to refine sanding marks and prepare surfaces for later sanding, coating, or painting processes. It is not intended for rapid material removal or final polishing.
P400 is a medium-fine grit commonly used to remove sanding marks left by P240 or P320 and to prepare the surface for subsequent P600, P800, or painting processes.
Lower in cost and suitable for general-purpose sanding.
Offer better flatness and dimensional stability for automotive, coating, plastic, and composite material applications.
Compatible with standard dust collection trays and offers good versatility.
Provides a larger dust collection area but requires a matching tray.
P400 grit tends to generate fine dust when sanding primer, old paint, and coatings. If dust is not removed promptly, it can cause clogging, overheating, and random scratches.
