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Sanding Blocks

Flexible and rigid hand sanding blocks for automotive panel work. SPX sanding blocks conform to body contours for consistent sanding pressure and professional results on filler, primer, and topcoats — trusted by panel beaters and spray painters across Australia.

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SPX Sanding Block 2-Sided - 120-320 Grit
Sanding Blocks

SPX Sanding Block 2-Sided - 120-320 Grit

(0)
$1.18Incl. 10% GST
SPX Sanding Block 4-Sided - 40-220 Grit
Sanding Blocks

SPX Sanding Block 4-Sided - 40-220 Grit

(0)
$1.18Incl. 10% GST

How to Choose the Right Sanding Blocks

A quality sanding block is one of the most important hand tools in any panel shop. It distributes sanding pressure evenly across the abrasive, preventing finger grooves and high/low spots that would telegraph through primer and paint.

Types of sanding blocks:

**Rigid blocks:** Flat, firm blocks for levelling body filler, sanding flat panels, and feather-edging. The rigid backing ensures you sand flat rather than following surface undulations.

**Flexible blocks:** Slightly compliant blocks that conform to gentle curves — ideal for door panels, bonnets, and moderate contour work while still providing more pressure distribution than hand sanding alone.

**Contour blocks:** Shaped blocks with curved profiles for sanding body lines, radius edges, and tight contours where flat blocks would cause uneven contact.

Choosing the right block:

•Use a long rigid block (200–400mm) for levelling large flat areas like bonnets and roofs
•Use a medium flexible block for curved panels and door skins
•Use a small contour block for tight recesses, body lines, and door jambs

Most SPX sanding blocks accept standard 70mm wide abrasive rolls or can be used with sheet abrasive cut to size.

Frequently Asked Questions — Sanding Blocks

Why should I use a sanding block instead of sanding by hand?
Hand sanding without a block concentrates pressure on your fingertips, creating uneven sanding marks called "finger grooves" that show through primer and paint. A sanding block distributes pressure evenly across the full surface of the abrasive, producing a flat, consistent result. This is especially important when levelling body filler and sanding primer.
What abrasive should I use with a hand sanding block?
Use abrasive rolls (cut to the block width) or standard sanding sheets folded around the block. For levelling body filler, P80–P120 is standard. For primer and paint prep, P180–P400. For wet sanding clear coat, P800–P2000 wet/dry sheet. Ensure the grit is appropriate for the task before committing to a full panel.
Do you stock long board sanding blocks for large panels?
Yes. SPX stocks sanding blocks in various lengths, including long board options for levelling large flat surfaces such as bonnets, roofs, and boot lids. Long board sanding is the professional method for achieving dead-flat panel surfaces before primer application.

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