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?

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.

does this work on cast iron?

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

does this contain silicone? We are an auto body paint shop and must have silicone free

Contains petroleum distillates. Does not mention silicone on ingredient label.

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🔓 Unlock Your Tools' Potential with Knock’er Loose!

EFFORTLESS DISASSEMBLY - Easily loosen stubborn components for maintenance and repairs.
VERSATILE APPLICATIONS - Ideal for bolts, fittings, locks, and more—no job is too tough!
TRUSTED BY PROFESSIONALS - Join the ranks of industry leaders who rely on CRC for quality solutions.
UNLOCK THE POWER OF PENETRATION - Experience rapid rust and corrosion removal with our unique formula.
INDUSTRIAL STRENGTH EVERYDAY USE - Perfect for both heavy-duty machinery and household tools.

The CRCCRC Knock’er Loose Penetrating Solvent is a powerful 13 WT. Oz. industrial-grade lubricant designed to dissolve rust, grease, and corrosion. Its unique 50-state compliant formula ensures effective performance for both professional and household applications, making it an essential tool for maintenance and repair tasks.

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