While most multipurpose oils are great at doing… well, multiple things, if you’re looking for an industrial strength, low viscosity super penetrant, then KNOCK’ER LOOSE is the answer.

Renowned for its ability to seep into hard-to-reach places and free seized fasteners quickly, KNOCK’ER LOOSE is one of CRC Industries’ most popular products and has earned a worldwide reputation as a top-performing release agent.

The secret to KNOCK’ER LOOSE’s award-winning formula has a lot to do with its unique citrus additive. Upon using the solution, you will immediately notice its orange colour and noticeable citrus smell.

KNOCK’ER LOOSE features corrosion-protection qualities that prevent rust from returning.

This citrus additive is a natural rust- and scale-dissolving agent. Moreover, KNOCK’ER LOOSE features a strong solvent that cuts through grease and grime – allowing the citrus formula to penetrate deep into seized fasteners.

Another essential quality is KNOCK’ER LOOSE’s extra thin viscosity and non-drying performance. Unlike many other oils, KNOCK’ER LOOSE stays wet for longer so it can continue to seep into tight spaces.


The name, KNOCK’ER LOOSE stems from how the product is best applied…

Step 1: Spray the seized bolt or nut

Step 2: Knock (or tap) the fastener with a hammer

Step 3: Reapply KNOCK’ER LOOSE

Step: Loosen the fastener

Knocking the fastener with a hammer helps to cause hairline cracks in the scale and rust – allowing KNOCK’ER LOOSE to penetrate the cracks and get to work dissolving rust and grime.

Applications for KNOCK’ER LOOSE include…

  • Nuts
  • Bolts
  • Pins
  • Screws
  • Bushings
  • Clips
  • Hinges
  • Snaps
  • Lugs
  • Caps
  • Locks
  • Washers
  • Sliding mechanisms

Click here for more information on KNOCK’ER LOOSE.

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