---
product_id: 19315358
title: "3M Wetodry Sandpaper, 25 Sheets, 320 Grit Sanding Paper, 9-in x 11-in, For Final or Between Coats Sanding, Sandpaper For a Premiere Finish on Lacquers, Primers, Sealers, Plastics and Paints (99421NA)"
brand: "3m"
price: "$56.89"
currency: USD
in_stock: true
reviews_count: 8
url: https://www.desertcart.us/products/19315358-3m-wetodry-sandpaper-25-sheets-320-grit-sanding-paper-9
store_origin: US
region: United States of America
---

# 320 grit precision cut Waterproof & oil-compatible Dual weight backing options 3M Wetodry Sandpaper, 25 Sheets, 320 Grit Sanding Paper, 9-in x 11-in, For Final or Between Coats Sanding, Sandpaper For a Premiere Finish on Lacquers, Primers, Sealers, Plastics and Paints (99421NA)

**Brand:** 3m
**Price:** $56.89
**Availability:** ✅ In Stock

## Summary

> 💎 Elevate your finish game with 3M Wetordry – where precision meets perfection!

## Quick Answers

- **What is this?** 3M Wetodry Sandpaper, 25 Sheets, 320 Grit Sanding Paper, 9-in x 11-in, For Final or Between Coats Sanding, Sandpaper For a Premiere Finish on Lacquers, Primers, Sealers, Plastics and Paints (99421NA) by 3m
- **How much does it cost?** $56.89 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/19315358-3m-wetodry-sandpaper-25-sheets-320-grit-sanding-paper-9)

## Best For

- 3m enthusiasts

## Why This Product

- Trusted 3m brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Hand or Block Use:** Designed for effortless control whether sanding by hand or with a block.
- • **Versatile Dual Backing:** Flexible 'A' weight for contours, durable 'C' weight for heavy stock removal.
- • **Perfect for Final Touches:** Ideal for sanding between coats on lacquers, primers, and paints.
- • **Water-Activated Performance:** Use with water or cutting oil to prevent clogging and extend lifespan.
- • **Precision 320 Grit Silicon Carbide:** Experience ultra-smooth, fast cutting for flawless finishes.

## Overview

3M Wetordry Sandpaper offers 25 sheets of 320 grit silicon carbide abrasive designed for fast, smooth cutting. Waterproof and compatible with cutting oils, it reduces clogging and extends abrasive life. Available in flexible and durable waterproof paper backings, it’s perfect for final or between-coat sanding on lacquers, primers, sealers, plastics, and paints, usable by hand or with a sanding block.

## Description

3M Wetodry Sandpaper, 25 Sheets, 320 Grit Sanding Paper, 9-in x 11-in, For Final or Between Coats Sanding, Sandpaper For a Premiere Finish on Lacquers, Primers, Sealers, Plastics and Paints (99421NA)

## Features

- 320A grit
- SILICON CARBIDE ABRASIVE, a sharp synthetic mineral that cuts fast and smooth
- USE WITH WATER or cutting oil to reduce clogging and extend abrasive life
- OFFERED IN TWO WEIGHTS of waterproof paper to suit your specific sanding needs: flexible "A" weight backing for contour sanding and durable "C" weight backing for improved stock removal and leveling general surfaces
- For flat areas, for use by hand or with sanding block
- For use by hand or with sanding block
- Waterproof paper
- Follow the grain of the wood when sanding
- Skip no more than one grit in sanding sequence

## Product Details

- **Size:** 9" x 11"
- **Color:** Clear
- **Backing Type:** Paper
- **Product Dimensions:** 11"L x 9"W
- **Brand:** 3M

## Images

![3M Wetodry Sandpaper, 25 Sheets, 320 Grit Sanding Paper, 9-in x 11-in, For Final or Between Coats Sanding, Sandpaper For a Premiere Finish on Lacquers, Primers, Sealers, Plastics and Paints (99421NA) - Image 1](https://m.media-amazon.com/images/I/613-zMK+weL.jpg)

## Available Options

This product comes in different **Size, Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Sandpaper
*by C***M on April 9, 2025*

Satisfied customer.

### ⭐⭐⭐⭐⭐ 3m makes quality sandpaper
*by W***R on April 4, 2024*

3M sandpaper is the only sandpaper that I like to use for a reason.I have not found any other brands too be a superior product. 3M has been at the top of their game longer than my lifetime.Main reason Quality control

### ⭐⭐⭐⭐⭐ Best Paper!
*by B***Y on January 18, 2024*

3M make rocking good wet-or-dry sandpaper. I do a ton of auto body work. 3M makes a long-lasting, durable paper that cuts quickly. It's always the best!Big Rudy

## Frequently Bought Together

- 3M Wetodry Sandpaper, 25 Sheets, 320 Grit Sanding Paper, 9-in x 11-in, For Final or Between Coats Sanding, Sandpaper For a Premiere Finish on Lacquers, Primers, Sealers, Plastics and Paints (99421NA)
- 3m 99422 Pro-pak Wet/dry Sandpaper 9"x11" , 220a Grit
- 3M 88596NA 99420 Sand Paper, 9" x 11", Clear

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**Shop now:** [https://www.desertcart.us/products/19315358-3m-wetodry-sandpaper-25-sheets-320-grit-sanding-paper-9](https://www.desertcart.us/products/19315358-3m-wetodry-sandpaper-25-sheets-320-grit-sanding-paper-9)

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-03-07*