Sia Siafast 5 Inch Low Profile Backup Pad, Firm 3/8 In

Description

The Sia Siafast 5 inch low profile backup pad pairs a firm density core with a slim 3/8 inch thickness, giving random orbital and dual-action sanders a rigid platform for flat-panel stock removal in tight clearance areas. The firm density resists flexing under pressure, so the disc cuts evenly across the full face instead of rounding over edges, and the slimmer stack height clears trim, jigs, and fixtures a standard 1/2 inch pad would bump into.

Firm and low profile are two separate decisions that this pad combines into one part. Firm density is the choice when the job is leveling, not contouring, and low profile is the choice when clearance around the workpiece is tight enough that pad thickness itself becomes a limiting factor. Running the wrong density on a flat panel job means chasing high spots the pad should have leveled on the first pass.

Where the low profile backup pad is used

• Body shops leveling filler and primer on flat panels and rocker areas with limited clearance around trim and moldings
• Cabinet and millwork shops flattening panel faces before a finish-grit sanding pass
• Solid surface and countertop fabricators seaming and leveling flat stock ahead of polish
• Production sanding lines where a slim pad profile has to clear fixtures and jigs on a repetitive cycle

How the low profile backup pad holds up

Firm density backing keeps the pad face flat under aggressive pressure, which is what levels high spots fast without digging a crown into the surface the way a softer pad would. The 3/8 inch thickness keeps the pad’s overall stack height low, useful when working near trim, jigs, or fixtures where a thicker pad would bind or lift off the surface at an angle.

The no-hole (NH) face works with solid-back discs and keeps setup simple: no need to index a hole pattern before mounting, and no dust port to keep clear. That trade-off makes sense on jobs run without vacuum extraction, where a hole pattern would only be dead weight.

Backup pad specs

• Diameter: 5 in
• Thickness: 3/8 in
• Hole pattern: NH (no holes)
• Edge density: Firm
• Attachment: Hook and loop
• Compatible discs: Siafast and standard hook and loop sanding discs, 5 in diameter

Order the low profile backup pad in the firm density when the job calls for flat, fast leveling rather than a soft edge for contour work. Browse Chemical Concepts abrasives for matching discs, or see sia’s full pad lineup at siaabrasives.com.

Need Help?

Need help choosing pad density for flat leveling versus contour sanding? Call (800) 220-1966 or email [email protected].