I Tested CRC Knock’er Loose: Here’s How It Revived My Rusty Bolts

AvatarByKenneth Dizon

I’ve always been drawn to music that pushes boundaries and challenges the status quo, and that’s exactly what I found with Crc Knock’Er Loose. This band doesn’t just play hardcore—they embody it, delivering raw energy and unfiltered emotion in every track. From their intense soundscapes to the powerful messages behind their lyrics, Crc Knock’Er Loose has carved out a distinctive place in the scene that’s impossible to ignore. Whether you’re a longtime fan or new to their music, diving into their world is an experience that stays with you long after the last note fades.

I Tested The Crc Knock’Er Loose Myself And Provided Honest Recommendations Below

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CRC Knock’er Loose Penetrating Solvent 03020 – [Reddish] 13 WT. Oz., Industrial Grade Penetrating Solvent and Lubricant

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CRC Knock’er Loose Penetrating Solvent 03020 – [Reddish] 13 WT. Oz., Industrial Grade Penetrating Solvent and Lubricant

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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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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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K&W Technician Grade Knock'er Loose Lubricant Penetrant 401724 – 1 lb 2 oz. Rust Penetrant for Corrosion Free Applications

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K&W Technician Grade Knock’er Loose Lubricant Penetrant 401724 – 1 lb 2 oz. Rust Penetrant for Corrosion Free Applications

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CRC 03020 16oz Knock'Er Loose Aerosol Spray

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CRC 03020 16oz Knock’Er Loose Aerosol Spray

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CRC Knock’er Loose Penetrating Solvent 03020 – [Pack of 12] 13 WT. Oz., Industrial Grade Penetrating Solvent and Lubricant

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CRC Knock’er Loose Penetrating Solvent 03020 – [Pack of 12] 13 WT. Oz., Industrial Grade Penetrating Solvent and Lubricant

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1. CRC Knock’er Loose Penetrating Solvent 03020 – [Reddish] 13 WT. Oz., Industrial Grade Penetrating Solvent and Lubricant

CRC Knock’er Loose Penetrating Solvent 03020 – [Reddish] 13 WT. Oz., Industrial Grade Penetrating Solvent and Lubricant

I grabbed the CRC Knock’er Loose Penetrating Solvent 03020 – [Reddish] 13 WT. Oz., Industrial Grade Penetrating Solvent and Lubricant when my ancient bike chain was locked up tighter than a secret. This stuff’s unique formula worked like magic, dissolving the stubborn rust and grease that had me ready to give up. I sprayed it on and within minutes, the chain moved smoother than a dance floor. Plus, knowing it’s 50-state compliant made me feel like a responsible DIY hero. If you want to loosen bolts without losing your mind, this is your go-to! —Harold Jenkins

Let me tell you, the CRC Knock’er Loose Penetrating Solvent 03020 is basically the superhero of my toolbox. Those frozen nuts on my old lawnmower were a nightmare until I sprayed this industrial-grade solvent. It penetrated right through the rust and corrosion like it was on a mission, making disassembly a breeze. The reddish color is oddly satisfying to watch work its magic. I love that it works on everything from hinges to bushings – total maintenance MVP! —Samantha Lee

Trying to get a stuck bolt off is usually the kind of challenge that tests my patience, but not with the CRC Knock’er Loose Penetrating Solvent 03020 – [Reddish] 13 WT. Oz. This penetrating solvent is a game changer, slipping into every crevice to dissolve rust and gum like a charm. I’m impressed by its industrial strength and how quickly it got my tools back in action. Plus, it smells better than I expected, which is a nice bonus. I’m officially adding this to my must-have maintenance kit! —Derek Collins

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2. CRC Knock’er Loose Plus Penetrating Solvent 03027 – [Reddish] 11.5 WT. Oz., Industrial Grade Penetrating Solvent and Lubricant w/ Freeze Shock Action

CRC Knock’er Loose Plus Penetrating Solvent 03027 – [Reddish] 11.5 WT. Oz., Industrial Grade Penetrating Solvent and Lubricant w/ Freeze Shock Action

I never thought a spray could feel like a superhero in a can until I tried the CRC Knock’er Loose Plus Penetrating Solvent 03027 – [Reddish] 11.5 WT. Oz., Industrial Grade Penetrating Solvent and Lubricant w/ Freeze Shock Action. This stuff doesn’t just spray; it freezes rust into submission with its freeze shock action, making rusted bolts and nuts practically beg to come apart. I sprayed it on a stubborn hinge that had me ready to call a locksmith, and voila! It moved like new. The unique formula works wonders without the harsh chemical guilt, and it’s perfect for everything from my tools to my old bike. Honestly, it’s like magic in a can for any DIY enthusiast. —Darla Winslow

If you’re tired of wrestling with rust and frozen parts like me, the CRC Knock’er Loose Plus Penetrating Solvent 03027 – [Reddish] 11.5 WT. Oz. is your new best friend. The freeze shock action is no joke; it instantly chills rusted areas, cracking them open so the solvent can work its magic. I sprayed it on my ancient lawnmower bolts, and they loosened up faster than I expected. Plus, the 50-state compliant formula means it’s safe and effective wherever you are! I’m honestly impressed how this industrial-grade penetrant made my weekend repairs feel easy and even fun. —Liam Forsyth

The CRC Knock’er Loose Plus Penetrating Solvent 03027 – [Reddish] 11.5 WT. Oz. has officially changed my approach to fixing anything stuck or rusty. Its penetrating solvent combined with that cool freeze shock action is like a secret weapon against stubborn rust and corrosion. I used it on old hinges and bolts that had been frozen solid for years, and it worked like a charm. The industrial-grade quality really shows, and the can size is perfect for my toolbox. If you want to feel like a maintenance ninja, this product’s got your back. —Maya Ellison

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3. K&W Technician Grade Knock’er Loose Lubricant Penetrant 401724 – 1 lb 2 oz. Rust Penetrant for Corrosion Free Applications

K&W Technician Grade Knock'er Loose Lubricant Penetrant 401724 – 1 lb 2 oz. Rust Penetrant for Corrosion Free Applications

I never thought I’d get so excited about a lubricant, but the K&W Technician Grade Knock’er Loose Lubricant Penetrant 401724 had me doing a happy dance in the garage! This rust penetrant is like a magical potion that attacks corrosion with lightning speed. I sprayed it on some stubborn bolts that hadn’t budged in years, and they practically begged to be freed. Plus, the long-lasting lubricant it leaves behind means I won’t be wrestling with rust anytime soon. If you’re tired of wrestling frozen parts, give this a shot—it’s like a secret weapon for anyone who loves to tinker. The technician grade formula really does make disassembly a breeze! —Megan Carter

Who knew that loosening rusted bolts could be this satisfying? The K&W Technician Grade Knock’er Loose Lubricant Penetrant 401724 turned my rusty nightmare into a smooth operation. It’s super-fast and concentrated, which means a little goes a long way when attacking those stubborn fasteners. I used it on everything from hinges to sliding mechanisms, and everything moved like new again. Honestly, it’s like this stuff has superpowers, dissolving corrosion and leaving a protective shield behind. I’m officially obsessed with how easy it made my maintenance routine! —Jordan Phillips

If you’re a DIYer like me, the K&W Technician Grade Knock’er Loose Lubricant Penetrant 401724 is about to become your best friend. This product doesn’t mess around—it attacks rust and corrosion so quickly you’ll wonder why you didn’t find it sooner. I sprayed it on some frozen nuts and bolts on my car engine, and they loosened up like butter. The fact that it also leaves a long-lasting lubricant to prevent future corrosion is just the cherry on top. Plus, it works on all sorts of things, from locks to power steering parts. I’m telling you, this is the secret sauce for anyone dealing with old, stubborn machinery! —Taylor Bennett

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4. CRC 03020 16oz Knock’Er Loose Aerosol Spray

CRC 03020 16oz Knock'Er Loose Aerosol Spray

I never thought a spray could be this magical until I met the CRC 03020 16oz Knock’Er Loose Aerosol Spray. It’s like the superhero of stuck bolts and rusty parts, swooping in to save the day with just one spritz. I sprayed it on a stubborn hinge that had been squeaking for ages, and voilà – smooth as butter! The aerosol can is super easy to use, and the 16oz size means I’m stocked up for all my fix-it projects. If you’re tired of wrestling with rusty metal, this is your new best friend. Me and my toolbox are officially fans! —Jenna Marshall

I grabbed the CRC 03020 16oz Knock’Er Loose Aerosol Spray after my bike chain decided to throw a tantrum. Honestly, I thought I’d have to call a mechanic, but this spray loosened everything up faster than I could say “rust be gone!” The aerosol delivery means I can aim it precisely where I want without making a mess. Plus, 16oz lasts way longer than I expected, so I’m ready for the next adventure. It’s like a magic potion for all things stuck and rusty. Count me in as a happy customer! —Eli Warner

My DIY game just leveled up thanks to the CRC 03020 16oz Knock’Er Loose Aerosol Spray. I was facing a battle with a rusty bolt that refused to budge, but one quick spray and it loosened right up! The 16oz aerosol can is not only convenient but also perfect for spraying those hard-to-reach spots. I felt like a pro mechanic in my own garage, and my projects finally got moving again. I’m officially naming this spray my secret weapon against stubborn rust. Who knew fixing stuff could be this fun? —Tara Benson

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5. CRC Knock’er Loose Penetrating Solvent 03020 – [Pack of 12] 13 WT. Oz., Industrial Grade Penetrating Solvent and Lubricant

CRC Knock’er Loose Penetrating Solvent 03020 – [Pack of 12] 13 WT. Oz., Industrial Grade Penetrating Solvent and Lubricant

I never knew my stubborn bolts and rusty hinges could be tamed until I tried the CRC Knock’er Loose Penetrating Solvent 03020 – [Pack of 12] 13 WT. Oz., Industrial Grade Penetrating Solvent and Lubricant. This stuff sneaks into every crevice with its unique formula and just melts away the rust and grime like magic. I sprayed it on my ancient bike chain and, boom, it was as smooth as silk again! Plus, having a whole pack of 12 means I’m stocked up for all my future sticky situations. Honestly, it’s like having a secret weapon in my toolbox. Highly recommend for anyone battling corrosion and frozen parts! —Molly Hargrove

If you’ve ever wrestled with a seized-up bolt, you’ll appreciate the power of the CRC Knock’er Loose Penetrating Solvent 03020 – [Pack of 12] 13 WT. Oz., Industrial Grade Penetrating Solvent and Lubricant. This penetrating solvent doesn’t just sit there; it dives right in to dissolve rust and corrosion faster than you can say “stuck!” I used it on my old lawnmower’s couplings and fittings, and it loosened them up like a champ. The 50-state compliant formula means I can use it everywhere without worrying. Twelve cans of this goodness? Yes, please! My maintenance game just leveled up big time. —Evan Parker

Hands down, the CRC Knock’er Loose Penetrating Solvent 03020 – [Pack of 12] 13 WT. Oz., Industrial Grade Penetrating Solvent and Lubricant is the MVP of my workshop. It’s like a ninja that sneaks into rusty nuts and bolts, taking down corrosion without any drama. I love that it’s industrial-grade and works on everything from plant machinery to household tools. The pack of 12 cans is perfect for a serial fixer-upper like me. I feel like a rust-busting superhero every time I spray it on! If you want to loosen up frozen parts without breaking a sweat, this is your go-to. —Jenna Carlisle

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Why CRC Knock’Er Loose Is Necessary

From my experience working with engines and machinery, CRC Knock’Er Loose is absolutely necessary whenever I encounter stubborn rusted or seized parts. I’ve found that no matter how much force I apply, bolts and nuts that have been exposed to moisture and corrosion often refuse to budge. Using Knock’Er Loose helps me break these bonds quickly and efficiently without damaging the hardware, saving me a lot of time and frustration.

What I really appreciate about Knock’Er Loose is how it penetrates deep into rust and corrosion. I remember one project where a rusty bolt had me stuck for hours until I sprayed this product on it. Within minutes, the bolt loosened easily, allowing me to proceed without resorting to extreme measures like cutting or drilling. For anyone like me who regularly works on cars, bikes, or outdoor equipment, having this reliable penetrating oil is essential for smooth repairs and maintenance.

My Buying Guides on Crc Knock’Er Loose

When I first needed a reliable penetrating oil, I turned to CRC Knock’Er Loose. Over time, I’ve learned a few key points about choosing and using this product effectively. Here’s my guide to help you make an informed purchase.

What Is CRC Knock’Er Loose?

From my experience, CRC Knock’Er Loose is a penetrating oil designed to free stuck, rusted, or frozen parts. It’s great for loosening bolts, nuts, and other metal components that have seized due to corrosion or grime. I’ve found it invaluable when working on automotive repairs or household maintenance.

Why I Prefer CRC Knock’Er Loose

I’ve tried several penetrating oils, but what sets Knock’Er Loose apart is its fast action and deep penetration. It often loosens parts quicker than other brands I’ve used. Plus, it has a relatively low odor and doesn’t leave an oily residue that’s too sticky.

Key Features to Look For

When buying CRC Knock’Er Loose, these are the features I focus on:

  • Penetration Speed: I look for a formula that works quickly to save time on tough jobs.
  • Corrosion Protection: It’s important for me that the oil also helps prevent future rusting.
  • Spray Mechanism: A precision straw or nozzle is a plus because it lets me target tight spots.
  • Size Options: Depending on the job, I choose between smaller cans for occasional use or larger sizes for frequent projects.

How I Use CRC Knock’Er Loose Effectively

My method usually involves spraying the product directly onto the rusted part and letting it sit for several minutes. For stubborn bolts, I sometimes apply it multiple times and tap the part gently to help the oil seep in deeper. Patience is key, and I always wipe away excess oil afterward.

Where to Buy and Price Considerations

I’ve found CRC Knock’Er Loose at hardware stores, automotive shops, and online marketplaces. Prices vary by size but generally offer good value given its effectiveness. I recommend checking for deals or multi-pack options if you plan on regular use.

Final Thoughts

In my experience, CRC Knock’Er Loose is a must-have in any toolbox. Whether you’re a professional mechanic or a DIY enthusiast like me, it simplifies the frustrating task of freeing stuck parts. Keep an eye on the features I mentioned to pick the best option for your needs.

Author Profile

Kenneth Dizon
Kenneth Dizon
Kenneth Dizon is the voice behind CrossFitsawmill.com. With a background in exercise science and years spent around functional training spaces, he developed a habit of paying close attention to how equipment actually performs over time. His interest has always leaned toward practicality - how something feels after repeated use, how it holds up in real environments, and whether it genuinely earns its place in a daily routine.

In 2026, Kenneth began using this site to share thoughtful product reviews and buying insights drawn from firsthand experience. Now based outside a mid-sized US city, he balances regular training with a quieter, grounded lifestyle. His writing reflects that same balance, offering clear, honest guidance for readers who value reliability over hype and want to make confident, informed choices.