--- product_id: 12984494 title: "CRC Knock'er Loose Penetrating Solvent - Rusted Bolt Remover - 13 oz" brand: "crc" price: "¥8211" currency: JPY in_stock: true category: "Crc" url: https://www.desertcart.jp/products/12984494-crc-knocker-loose-penetrating-solvent-rusted-bolt-remover-13-oz store_origin: JP region: Japan --- # Fast-acting rust penetration Visible reddish formula for precise application Versatile industrial-grade solvent CRC Knock'er Loose Penetrating Solvent - Rusted Bolt Remover - 13 oz **Brand:** crc **Price:** ¥8211 **Availability:** ✅ In Stock ## Summary > 🔧 Break Free from Rust, Fast and Flawlessly! ## Quick Answers - **What is this?** CRC Knock'er Loose Penetrating Solvent - Rusted Bolt Remover - 13 oz by crc - **How much does it cost?** ¥8211 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/12984494-crc-knocker-loose-penetrating-solvent-rusted-bolt-remover-13-oz) ## 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 - • **Trusted by Professionals:** Highly rated with 4.7 stars from over 1,500 reviews—join the ranks of experts who rely on Knock'er Loose. - • **Multi-Industry Powerhouse:** Trusted across automotive, marine, agricultural, and manufacturing sectors for all your stubborn bolt challenges. - • **Unlock Rusted Bolts in Seconds:** Industrial-strength formula rapidly penetrates rust and corrosion to free seized fasteners without heat or force. - • **Low Viscosity, Deep Penetration:** Slow-viscosity formula seeps deep into threads, breaking down rust and scale for effortless loosening. - • **Precision Application with Red Tint:** Distinctive reddish color ensures you never miss a spot, guaranteeing thorough coverage every time. ## Overview CRC Knock'er Loose is a 13 oz industrial-grade penetrating solvent designed to rapidly dissolve rust, scale, and corrosion on seized nuts, bolts, hinges, and threaded components. Featuring a distinctive red formula for easy application tracking, it’s a low-viscosity, fast-acting solution trusted by professionals across automotive, marine, agricultural, and manufacturing industries to loosen stubborn fasteners without heat or damage. ## Description Every seized bolt feels like a personal challenge. You've been there: rusted threads that won't give, bolts fused by time and neglect, and a supervisor asking how long it'll take. You can't waste heat, force, or patience. You just need it loose, and fast. CRC Knock'er Loose quickly cuts through rust, scale gum, and corrosion, freeing frozen parts without torching, over-torquing, or breaking components. It's slow-viscosity formula seeps deep to do the hard work for you. ## Features - FAST-ACTING RUST PENETRATION: Industrial-strength solvent rapidly penetrates rust, scale, and corrosion to help loosen stubborn seized nuts, bolts, hinges, and threaded components. - PENETRATING SOLVENT: Best for freezing rusted, seized, or corroed fasteners. - DISTINCTIVE REDDISH FORMULA: The visible red color makes it easy to see where you've applied the product, helping ensure thorough coverage on rusted parts. - VERSATILE INDUSTRIAL USE: Suitable for automotive, marine, agricultural, manufacturing, and home workshop applications — works on nuts, bolts, chains, hinges, and linkages. - PRODUCT SPECIFICATIONS: This product is available in an 11 wt oz aerosol can. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000LEVE00 | | Best Sellers Rank | #3,186 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #24 in Industrial Lubricants | | Brand | CRC | | Brand Name | CRC | | Compatible Material | Metal | | Container Type | Can | | Customer Reviews | 4.7 out of 5 stars 1,580 Reviews | | Flash Point | 64 °C | | Global Trade Identification Number | 00078254030203 | | Included Components | KNOCK'ER LOOSE SOLVENT 13 OZ | | Item Form | Spray | | Item Highlight | Industrial-Grade, Fast-Acting Penetrating Oil, Rusted & Corroded Bolt & Nut Loosening, Screw & Hinge Release | | Item Type Name | Super Penetrant | | Item Weight | 16 ounces | | Liquid Volume | 16 fluid ounces | | Manufacturer | CRC Industries | | Material | Metal | | Model Number | 03020 | | Number of Items | 1 | | Number of Packs | 1 | | Package Information | Can | | Part Number | 03020 | | Recommended Uses For Product | Electrical | | Specific Uses For Product | Industrial maintenance, electrical applications, loosening seized fasteners, removing rust and corrosion | | UPC | 078254030203 | | Unit Count | 13 Ounce | | Upper Temperature Rating | 147 °F | | Viscosity | Low | | Viscosity Level | Low | | Warranty Description | limited warranty | ## Product Details - **Brand:** CRC - **Item Weight:** 16 ounces - **Liquid Volume:** 16 fluid ounces - **Material:** Metal - **Package Information:** Can ## Images ![CRC Knock'er Loose Penetrating Solvent - Rusted Bolt Remover - 13 oz - Image 1](https://m.media-amazon.com/images/I/71aBGRJDV5L.jpg) ![CRC Knock'er Loose Penetrating Solvent - Rusted Bolt Remover - 13 oz - Image 2](https://m.media-amazon.com/images/I/81xW4kKCECL.jpg) ![CRC Knock'er Loose Penetrating Solvent - Rusted Bolt Remover - 13 oz - Image 3](https://m.media-amazon.com/images/I/81yUQPD+ApL.jpg) ![CRC Knock'er Loose Penetrating Solvent - Rusted Bolt Remover - 13 oz - Image 4](https://m.media-amazon.com/images/I/91XA2r+CZKL.jpg) ![CRC Knock'er Loose Penetrating Solvent - Rusted Bolt Remover - 13 oz - Image 5](https://m.media-amazon.com/images/I/81yUr+QcCOL.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. ## 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 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.jp/products/12984494-crc-knocker-loose-penetrating-solvent-rusted-bolt-remover-13-oz](https://www.desertcart.jp/products/12984494-crc-knocker-loose-penetrating-solvent-rusted-bolt-remover-13-oz) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-09-22*