---
product_id: 549316902
title: "SIGNI S/C Plastic Back Grinding Disc for Granite/Marble/Concrete and Glasses (36 Grit, 4.5 inch)"
brand: "signi"
price: "$241604"
currency: COP
in_stock: true
reviews_count: 5
category: "Signi"
url: https://www.desertcart.co/products/549316902-signi-s-c-plastic-back-grinding-disc-for-granite-marble
store_origin: CO
region: Colombia
---

# Plastic back - lighter & faster cutting 36 Grit Silicon Carbide - ultra aggressive grinding 4.5 inch diameter - fits most angle grinders SIGNI S/C Plastic Back Grinding Disc for Granite/Marble/Concrete and Glasses (36 Grit, 4.5 inch)

**Brand:** signi
**Price:** $241604
**Availability:** ✅ In Stock

## Summary

> ⚡ Grind faster, finish smoother — own the edge of precision!

## Quick Answers

- **What is this?** SIGNI S/C Plastic Back Grinding Disc for Granite/Marble/Concrete and Glasses (36 Grit, 4.5 inch) by signi
- **How much does it cost?** $241604 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co](https://www.desertcart.co/products/549316902-signi-s-c-plastic-back-grinding-disc-for-granite-marble)

## Best For

- signi enthusiasts

## Why This Product

- Trusted signi brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Universal 4.5" Fit:** Compatible with most angle grinders—no backing pad needed for quick setup.
- • **Bulk Pack of 5 Discs:** Stay stocked and ready for any project—perfect for pros and serious DIYers alike.
- • **Lightweight Plastic Backing:** Reduces fatigue and boosts grinding speed without sacrificing durability.
- • **Smooth, Even Surface Finish:** Outperforms resin fiber discs by leaving minimal scratches on concrete and stone.
- • **Aggressive Silicon Carbide Grit:** 36 grit ensures rapid material removal with precision control.

## Overview

The SIGNI S/C Plastic Back Grinding Disc is a 4.5-inch, 36 grit silicon carbide disc designed for aggressive yet smooth grinding on granite, marble, concrete, and glass. Its plastic backing makes it lighter and faster than traditional discs, fitting most angle grinders without a backing pad. Sold in packs of five, it’s ideal for professionals and DIY enthusiasts seeking efficient, high-quality surface preparation.

## Description

S/C (Silicon Carbide) These grain types are very aggressive. The grinding disc is flat with a plastic back. The sanding disc fits most angle grinders and does not require a backing pad. The grinding disc attaches directly to the hand of the grinding machine. In comparison to depressed center wheels or resin fiber discs it is lighter, cuts faster, and grinds faster while leaving an even surface. Qty included : 5 Pcs 4.5" grinding disc in one pack.

Review: Works perfect, good buy.
Review: We use this discs when filling control joints in warehouses with polyurea joint filler compounds. This disc is aggressive enough to remove the overfilled material, but does not leave significant scratching on the concrete. This is great to use when we are only filling joints and not grinding the entire concrete slab. It is a great option for polished concrete and coating professionals/DIY'ers.

## Features

- Brand: Signi
- Construction type: Coated
- Brand: SIGNI

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0892PNY65 |
| Best Sellers Rank | #204,299 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #181 in Grinding Discs |
| Item model number | 793513613569 |
| Manufacturer | SIGNI INDUSTRIAL (SHANGHAI)CO.,LTD |
| Product Dimensions | 11.43 x 11.43 x 0.25 cm; 340 g |

## Product Details

- **Brand:** SIGNI
- **Compatible devices:** Angle Grinder
- **Grit material:** Rubber
- **Grit type:** Coarse
- **Product dimensions:** 11.4L x 11.4W centimeters

## Images

![SIGNI S/C Plastic Back Grinding Disc for Granite/Marble/Concrete and Glasses (36 Grit, 4.5 inch) - Image 1](https://m.media-amazon.com/images/I/41TwmaHQg3L.jpg)
![SIGNI S/C Plastic Back Grinding Disc for Granite/Marble/Concrete and Glasses (36 Grit, 4.5 inch) - Image 2](https://m.media-amazon.com/images/I/51Gk8pLes-L.jpg)
![SIGNI S/C Plastic Back Grinding Disc for Granite/Marble/Concrete and Glasses (36 Grit, 4.5 inch) - Image 3](https://m.media-amazon.com/images/I/51Ku6UCBhhL.jpg)
![SIGNI S/C Plastic Back Grinding Disc for Granite/Marble/Concrete and Glasses (36 Grit, 4.5 inch) - Image 4](https://m.media-amazon.com/images/I/51q6T+pb-ZL.jpg)
![SIGNI S/C Plastic Back Grinding Disc for Granite/Marble/Concrete and Glasses (36 Grit, 4.5 inch) - Image 5](https://m.media-amazon.com/images/I/91FUQSqq-yL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by K***. on 9 January 2026*

Works perfect, good buy.

### ⭐⭐⭐⭐⭐ Review
*by D***W on 6 November 2024*

We use this discs when filling control joints in warehouses with polyurea joint filler compounds. This disc is aggressive enough to remove the overfilled material, but does not leave significant scratching on the concrete. This is great to use when we are only filling joints and not grinding the entire concrete slab. It is a great option for polished concrete and coating professionals/DIY'ers.

### ⭐⭐⭐⭐⭐ Review
*by A***R on 17 April 2025*

These are awesome for fiberglass, fixing an old boat, it just literally chunks it out, even use it too cut too. They last a long time

## Frequently Bought Together

- SIGNI S/C Plastic Back Grinding Disc for Granite/Marble/Concrete and Glasses (36 Grit, 4.5 inch)
- SIGNI 5 Pack SiC Plastic Back Grinding Wheel for Granite/Marble/Concrete and Glasses (4.5 INCH, 24 GRIT)
- BHA Silicon Carbide Semi-Flexible Masonry and Coating Removal Sanding Disc, 4.5" x 7/8" - 5 Pack (60 Grit)

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*Product available on Desertcart Colombia*
*Store origin: CO*
*Last updated: 2026-03-04*