Mirka Polarstar SR 32mm Sanding Discs PSA P3000, 100 Pack

With an innovative resin-over-resin bond and low-carbon footprint production, Polarstar SR offers superior cutting power and long-lasting performance. Its ultra-smooth finish makes it an essential tool for automotive refinishing and high-end polishing tasks.

PSA (Pressure Sensitive Adhesive) Backing – Quick and secure attachment.

Advanced Polyester Film Construction – Durable and flexible.

Defined Mono-Layer Coating – Consistent and uniform sanding performance.

Ultra-Fine P2500 Grit (7 Microns) – Perfect for paint correction.

Attachment Type: PSA
Backing Material: Polyester film
Bonding: Resin over resin
Coating: Defined mono-layer coating technology
Color: Pale yellow (SR3), Mint green (SR5), Lilac (SR7)
Diameter: 32 mm
Form: Discs
Grain: Aluminium oxide
Hole Configuration: 0

What is the Polarstar SR 32mm Channel PSA disc used for?
Polarstar SR is designed specifically for precision spot repair in automotive environments, particularly for removing dust nibs and correcting small defects in clear coats and top coats.

Is this abrasive suitable for wet sanding?
Yes. Polarstar SR is optimized for wet sanding, providing smoother results and better control while minimizing airborne dust.

Does the film backing make a difference?
Yes. The durable film backing ensures the disc holds up during use, resists tearing, and delivers consistent, smooth sanding results.

What does PSA mean?
PSA stands for Pressure Sensitive Adhesive.
It means the back of the disc is coated with a sticky adhesive that allows it to easily stick to a sanding tool or backup pad — no hook & loop (Velcro) or clamps needed. They're perfect for spot repairs and situations where you need precision and consistency — exactly what Polarstar SR is designed for.