---
product_id: 12984494
title: "CRC Knock’er Loose Penetrating Solvent 03020 – [Reddish] 13 WT. Oz., Industrial Grade Penetrating Solvent and Lubricant"
brand: "crc"
price: "$33.96"
currency: USD
in_stock: true
reviews_count: 8
category: "Crc"
url: https://www.desertcart.us/products/12984494-crc-knock-er-loose-penetrating-solvent-03020-reddish-13-wt
store_origin: US
region: United States of America
---

# 50-state compliant formula Industrial-grade strength Penetrates rust & corrosion fast CRC Knock’er Loose Penetrating Solvent 03020 – [Reddish] 13 WT. Oz., Industrial Grade Penetrating Solvent and Lubricant

**Brand:** crc
**Price:** $33.96
**Availability:** ✅ In Stock

## Summary

> 🛠️ The Rust-Busting Sidekick Every Pro Needs!

## Quick Answers

- **What is this?** CRC Knock’er Loose Penetrating Solvent 03020 – [Reddish] 13 WT. Oz., Industrial Grade Penetrating Solvent and Lubricant by crc
- **How much does it cost?** $33.96 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/12984494-crc-knock-er-loose-penetrating-solvent-03020-reddish-13-wt)

## Best For

- crc enthusiasts

## Why This Product

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

## Key Features

- • **Compact & Ready:** 13 oz aerosol can delivers precision spray exactly where you need it—no mess, no fuss.
- • **Compliant & Safe:** 50-state compliant and NSF H2 registered for use even in meat and poultry plants.
- • **Versatile Application:** Perfect for bolts, hinges, couplings, washers, and frozen fittings across industries.
- • **Industrial-Grade Power:** Trusted by pros for heavy-duty machinery, automotive, and household tools maintenance.
- • **Unlock Rusty Stubbornness:** Penetrates deep to dissolve rust, scale, and corrosion for effortless disassembly.

## Overview

CRC Knock’er Loose is a powerful industrial-grade penetrating solvent and lubricant designed to quickly dissolve rust, corrosion, grease, and grime. Its 50-state compliant formula is NSF H2 registered, making it safe for use in sensitive environments like meat and poultry plants. Ideal for loosening frozen bolts, hinges, and fittings, this 13 oz aerosol can is a must-have for professionals and DIYers seeking reliable, fast-acting maintenance solutions.

## Description

CRC Knock’er Loose penetrates cracks, machine assemblies, frozen connections, and fittings to quickly dissolve rust, corrosion, grime, and grease. The 50-state compliant formula makes it easy to disassemble tools, automobile engines, plant machinery, and other equipment for routine maintenance. This industrial-grade penetrating solvent is NSF H2 registered for use in meat and poultry plants. It works effectively on various metal fittings, hinges, bushings, washers, lugs, nuts, bolts, metal joints, and couplings.

Review: As good, if not better, than PB Blaster. - CRC is my primary go-to when it comes to the products I keep around my shop for my DIY projects. So, after I received my Knock'er Loose, I immediately got busy on some rusty mower deck bolts. I was very pleased with the results and only had to heat up one of the dozen or so bolts I had to remove. I feel like it's a very good product that's well worth the money I spent on it. I also appreciate that CRC sponsors several of the Youtube content creators that I typically watch. Honestly, Youtube is how I found out about CRC and their products.
Review: CRC Knock’er Loose: The Superhero of Starter Bolts! - So, picture this: My husband, the fearless shade tree mechanic, facing off against the stubborn starter bolts of his beloved Ford F150 pickup. These bolts, determined to defy his every effort, seemed to be mocking him with their unyielding grip. Enter stage left: CRC Knock’er Loose Penetrating Solvent 03020 – the trusty sidekick in his battle against rust and resistance! Let me tell you, folks, this stuff is like a superhero in a can. With a mere squirt, it swoops in to save the day, penetrating even the tightest of spaces with its industrial-grade might. As my husband affectionately calls it, this "reddish elixir of liberation" works miracles, loosening those stubborn bolts with a satisfying pop that signals victory! Now, I'm no stranger to the drama that unfolds in the garage when my husband is knee-deep in his DIY escapades. But let me tell you, CRC Knock’er Loose turned what could have been a comedy of errors into a triumph worthy of its own action movie sequel. With each bolt that surrendered to its powers, my husband's confidence soared higher than a superhero taking flight. And the best part? The humor! Oh, the laughter that ensued as my husband regaled me with tales of his epic battles with the bolts, complete with sound effects and dramatic reenactments. Who knew a can of penetrating oil could bring so much joy to our lives? So, to all the shade tree mechanics out there, I wholeheartedly recommend CRC Knock’er Loose Penetrating Solvent 03020. Whether you're facing off against starter bolts, rusty hinges, or any other stubborn foe, this superhero in a can is here to save the day – and provide a good laugh along the way!

## Features

- CRC INDUSTRIES: A market leader that offers impeccably designed chemical solutions to maintain, protect and repair different marine, heavy-duty motor vehicles, industrial-grade engines, household tools and electrical equipment.
- PENETRATING SOLVENT: A unique solvent that penetrates surfaces to quickly dissolve rust, scale, gum, grease, and corrosion. Helps to remove and prevent rust.
- UNIQUE FORMULA: Knock’er Loose offers a 50-state compliant formula that provides great performance in easing the disassembly of tools, automobile engines, plant machinery, and other equipment for routine maintenance.
- APPLICATIONS: Knock’er Loose works effectively to dissolve and loosen rust and corrosion from couplings, bolts, fittings, locks, washers, sliding mechanisms, hinges, bushings, nuts, and other frozen components.
- PRODUCT SPECIFICATIONS: Knock'er Loose is available in a 13 wt. oz aerosol can.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000LEVE00 |
| Best Sellers Rank | #2,316 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #18 in Industrial Lubricants |
| Brand | CRC |
| Date First Available | February 13, 2008 |
| Flash Point | 64 Degrees Celsius |
| Global Trade Identification Number | 00078254030203 |
| Is Discontinued By Manufacturer | No |
| Item Form | Grease |
| Item Weight | 1 pounds |
| Item model number | 03020 |
| Liquid Volume | 16 Fluid Ounces |
| Manufacturer | CRC Industries |
| Material | Metal |
| National Stock Number | 9150-00-261-7899 |
| Number of Items | 1 |
| Package Information | Can |
| Product Dimensions | 2.6 x 2.6 x 7.9 inches |
| Recommended Uses For Product | Electrical |
| UPC | 078254030203 |
| Unit Count | 3785.41 Milliliters |
| Upper Temperature Rating | 147 Degrees Fahrenheit |

## Product Details

- **Brand:** CRC
- **Item Weight:** 1 Pounds
- **Liquid Volume:** 16 Fluid Ounces
- **Material:** Metal
- **Package Information:** Can

## Images

![CRC Knock’er Loose Penetrating Solvent 03020 – [Reddish] 13 WT. Oz., Industrial Grade Penetrating Solvent and Lubricant - Image 1](https://m.media-amazon.com/images/I/71a0YQbG-RL.jpg)
![CRC Knock’er Loose Penetrating Solvent 03020 – [Reddish] 13 WT. Oz., Industrial Grade Penetrating Solvent and Lubricant - Image 2](https://m.media-amazon.com/images/I/81kdmsySyxL.jpg)
![CRC Knock’er Loose Penetrating Solvent 03020 – [Reddish] 13 WT. Oz., Industrial Grade Penetrating Solvent and Lubricant - Image 3](https://m.media-amazon.com/images/I/71O0d-1mghL.jpg)
![CRC Knock’er Loose Penetrating Solvent 03020 – [Reddish] 13 WT. Oz., Industrial Grade Penetrating Solvent and Lubricant - Image 4](https://m.media-amazon.com/images/I/712TTo5creL.jpg)
![CRC Knock’er Loose Penetrating Solvent 03020 – [Reddish] 13 WT. Oz., Industrial Grade Penetrating Solvent and Lubricant - Image 5](https://m.media-amazon.com/images/I/61Y-Krp9+AL.jpg)

## Available Options

This product comes in different **Number Of Items** options.

## Questions & Answers

**Q: Why do so many more people seem to use and recommend pb blaster, compared to knock'er loose? is pb just hype or is kl actually better?**
A: Its all opinion. But I am a 30 professional auto technician/shop owner and my opinion is KL or aerokroil is best. PB does great advertising.

**Q: does this work on cast iron?**
A: Not sure what you are trying to do, but we use the Knocker loose for rusted and hard to remove fasteners from various types of material, if you are having an issue with a bolt or some sort of fastener that you are trying to remove this product works great for that aspect,,hope this helps

**Q: How does this compare to Kroil?**
A: I prefer this to Kroil

**Q: does this contain silicone? We are an auto body paint shop and must have silicone free**
A: Contains petroleum distillates. Does not mention silicone on ingredient label.

## Customer Reviews

### ⭐⭐⭐⭐⭐ As good, if not better, than PB Blaster.
*by J***. on January 22, 2026*

CRC is my primary go-to when it comes to the products I keep around my shop for my DIY projects. So, after I received my Knock'er Loose, I immediately got busy on some rusty mower deck bolts. I was very pleased with the results and only had to heat up one of the dozen or so bolts I had to remove. I feel like it's a very good product that's well worth the money I spent on it. I also appreciate that CRC sponsors several of the Youtube content creators that I typically watch. Honestly, Youtube is how I found out about CRC and their products.

### ⭐⭐⭐⭐⭐ CRC Knock’er Loose: The Superhero of Starter Bolts!
*by U***7 on May 29, 2024*

So, picture this: My husband, the fearless shade tree mechanic, facing off against the stubborn starter bolts of his beloved Ford F150 pickup. These bolts, determined to defy his every effort, seemed to be mocking him with their unyielding grip. Enter stage left: CRC Knock’er Loose Penetrating Solvent 03020 – the trusty sidekick in his battle against rust and resistance! Let me tell you, folks, this stuff is like a superhero in a can. With a mere squirt, it swoops in to save the day, penetrating even the tightest of spaces with its industrial-grade might. As my husband affectionately calls it, this "reddish elixir of liberation" works miracles, loosening those stubborn bolts with a satisfying pop that signals victory! Now, I'm no stranger to the drama that unfolds in the garage when my husband is knee-deep in his DIY escapades. But let me tell you, CRC Knock’er Loose turned what could have been a comedy of errors into a triumph worthy of its own action movie sequel. With each bolt that surrendered to its powers, my husband's confidence soared higher than a superhero taking flight. And the best part? The humor! Oh, the laughter that ensued as my husband regaled me with tales of his epic battles with the bolts, complete with sound effects and dramatic reenactments. Who knew a can of penetrating oil could bring so much joy to our lives? So, to all the shade tree mechanics out there, I wholeheartedly recommend CRC Knock’er Loose Penetrating Solvent 03020. Whether you're facing off against starter bolts, rusty hinges, or any other stubborn foe, this superhero in a can is here to save the day – and provide a good laugh along the way!

### ⭐⭐⭐⭐⭐ The best penetrating oil
*by A***I on January 17, 2026*

Most people turn to PB Blaster when they need a penetrating oil. Most shops buy PB Blaster because the CRC is not as available in parts stores and it costs more. There is no question the CRC not only works better but way faster. If I wasn’t 100% convinced that it works better and much faster, I wouldn’t be buying it and paying for it out of my own pocket

## Frequently Bought Together

- CRC Knock’er Loose Penetrating Solvent 03020 – [Reddish] 13 WT. Oz., Industrial Grade Penetrating Solvent and Lubricant
- CRC Screwloose Super Penetrant 03060 – 11 WT OZ, Plastic Safe Aerosol for Corroded Fasteners, Seized Mechanical Components
- CRC Knock’er Loose Plus Penetrating Solvent 03027 – [Reddish] 11.5 WT. Oz., Industrial Grade Penetrating Solvent and Lubricant w/ Freeze Shock Action

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-03-04*