Sia Abrasives | 1950 Siaspeed 4-1/4" Sanding Disc - 0 Holes (100/BOX)

The 1950 Siaspeed 4-1/4" sanding disc is the versatile all-rounder for high stock removal, perfect surface quality, and long life. Coarse grits (40–80) feature a sharp ceramic and aluminum oxide blend for fast cutting; medium grits (P100–P400) use blue-fired semi-friable aluminum oxide for longer life and an excellent finish; and an ingenious stearate coating (from P80) resists clogging to maximize disc life. Solid 0-hole configuration with a Hook & Loop backing, compatible with standard 4-1/4" backing pads.

• 80 Grit — Coarse stock removal — leveling body filler and stripping old coatings.
• 120 Grit — Medium grit for feather-edging, smoothing primer, and removing coarse scratches.
• 150 Grit — Medium grit for feather-edging, smoothing primer, and removing coarse scratches.
• 220 Grit — Medium-fine refinement — leveling primer filler and keying surfaces for adhesion.
• 600 Grit — Very fine final sanding of high-build primers and clear coats before topcoat.

Applications

• Aggressive stripping of rust, old paint, and coatings
• Flatting of body filler and composite materials
• Fine sanding of primer filler and keying lacquers
• Blending and producing a matt finish for topcoat adhesion
• Removal of orange peel effect and dust inclusions
• Automotive refinishing, woodworking, and aerospace

Compatible Materials

• Color, lacquer, old lacquer, primer filler, body filler
• Primer coat, epoxy primer coat, cathodic dip primer coat
• Plastics, acrylic glass, Gelcoat polyester, GRP, wood, metal

Product Profile

Grit type: Mixed ceramic (40–80) / Semi-friable aluminum oxide (P100–P400) / White aluminum oxide (P500–1500)  |  Backing: FSC-certified paper / Film (fine grits)  |  Special coating: Stearate from P80  |  Pack: 100/box  |  Brand: Sia Abrasives 1950 Siaspeed