Indasa Double-Sided Sponge Hand Sanding Pads – Dual-Grit Foam Block for Curved Surfaces, P60–P240 (3100B Series)

Overview

The Indasa RhynoSoft 3100B is a double-sided foam sanding block engineered for hand sanding on curved, contoured, and hard-to-reach surfaces. Each pad features two abrasive faces with silicon carbide grain on a 13 mm high-density sponge core, allowing the user to work two grits from a single block. Sold in boxes of 10, the 3100B is the go-to choice for detail finishing in automotive, wood, and composite applications.

Key Features

• Double-sided abrasive – two grit faces per pad; work coarser and finer grits without swapping blocks
• 13 mm high-density sponge core – conforms to curves, radii, and mouldings without bridging or oversanding high spots
• Silicon carbide grain – sharp, fast-cutting abrasive suited for wet or dry use on paint, primer, and wood coatings
• Tear-resistant foam construction – long service life even with repeated flexing and wet use
• Prevents oversanding – foam compliance distributes pressure evenly, reducing the risk of cutting through edges and corners
• Box of 10 pads – production-ready quantity for body shops and finishing operations

Technical Specifications

• Series: 3100B
• Pad size: 4.75" × 3.75" × 0.5" (120 mm × 95 mm × 13 mm)
• Backing: High-density foam (sponge), 13 mm thick
• Abrasive grain: Silicon carbide
• Sides: Double-sided (abrasive on both faces)
• Grit range: P60, P100, P120, P150, P180, P220
• Use: Wet or dry
• Qty per box: 10 pads
• Brand: Indasa | Country of origin: Portugal

Application Suggestions

• Automotive refinishing: Sanding primer and filler on door jambs, wheel arches, and curved body panels; featheredging and spot repair finishing
• Wood & furniture: Profile sanding on mouldings, chair legs, cabinet door edges, and routed details
• Composite & marine: Fairing and gel-coat sanding on hull curves and tight radii
• Walls & drywall: Corner bead finishing and skim coat sanding where flat blocks leave marks

Compared to Alternatives

• vs. Indasa RhynoSoft 3700R roll: 3100B is a pre-cut double-sided block sold per box of 10 — ideal for detail and spot work; 3700R is a continuous roll for high-volume production sanding. Choose 3100B for precision, 3700R for throughput
• vs. Single-sided sanding sponges: 3100B's dual-grit design doubles usable abrasive surface per pad, reducing pad changes and cost-per-use in multi-grit workflows
• vs. Flat sanding sheets on a block: The 3100B's integrated foam eliminates the need for a separate sanding block on curved work — the sponge core acts as its own conformable backer