Diamax 4″ Blue Plastic Backer Pad with Sponge

The Diamax 4″ Blue Plastic Backer Pad with Sponge is a professional-grade support tool designed to provide enhanced cushioning and stability for diamond polishing and grinding pads on natural and engineered stone surfaces, including granite, marble, quartz, and engineered stone. Its unique sponge layer adds a slight flexibility and shock-absorbing effect, allowing polishing pads to conform more evenly to the stone surface, reducing the risk of uneven contact, surface imperfections, or chatter marks during polishing.

This backer pad is especially useful when working on curved edges, radius corners, or subtle surface variations, where a standard rigid backer pad may not maintain consistent contact. The 4″ diameter strikes a balance between precision control for detailed work and sufficient support for efficient material removal and finishing.

Constructed from durable blue plastic with a sponge interface, the pad is lightweight, easy to handle, and built to withstand repeated use in professional fabrication, installation, and restoration workflows. Its standard 5/8″‑11 threaded arbor ensures compatibility with most angle grinders, air polishers, and other polishing equipment, while the Velcro attachment system allows for quick, secure, and tool-free pad changes, improving workflow efficiency.

Suitable for both wet and dry polishing applications, this backer pad helps stone professionals achieve smooth, uniform finishes on flat surfaces, edges, corners, and profiles. The added sponge cushioning reduces operator fatigue, improves pad life, and enhances control over pressure and polishing consistency, making it an essential accessory for fabricators, countertop installers, tile contractors, and restoration specialists.

4" Blue Plastic Backer Pad with Sponge

Cushioned, durable backing plate for uniform polishing and grinding results.

Key Features & Specifications

Construction

High-quality plastic with integrated sponge layer for added flexibility and vibration absorption.

Attachment / Mounting

Compatible with Velcro-backed or standard diamond pads, ensuring secure attachment and minimal pad movement.

Intended Use

Supports wet or dry polishing and grinding of granite, marble, quartz, and engineered stone surfaces.

Flexibility & Control

Sponge cushioning provides even pressure distribution, reducing the risk of surface scratches or uneven polishing.

Max RPM

Suitable for high-speed operation (verify machine specifications for safe limits).

Compatible Tools

Fits hand polishers, angle grinders, and polishing machines designed for plastic backer pads.

Applications

Ideal for countertops, stair edges, tabletops, and decorative stone surfaces requiring precise, professional finishes.

Available Items and Specifications