1. Product Overview
Liquid Wrench Penetrating Oil is formulated to assist in loosening rusted or stuck bolts, nuts, and locks. Its specialized formula spreads across metal surfaces, providing lubrication and reducing friction to facilitate the removal of stubborn parts. This product contains Cerflon solid lubricant for durable, smooth operation and is suitable for use on painted and metal surfaces without causing damage. It features a low-odor, 0% VOC formula for versatile indoor and outdoor application.

Figure 1: A pack of Liquid Wrench Penetrating Oil cans, showcasing the product's packaging.
2. Safety Information
Always prioritize safety when using this product. Read and understand all warnings and instructions before use.
- Flammable: Keep away from heat, sparks, open flames, and hot surfaces. No smoking.
- Eye & Skin Irritant: Avoid contact with eyes and skin. Wear appropriate personal protective equipment, such as safety glasses and gloves.
- Harmful or Fatal if Swallowed: Do not ingest. If swallowed, seek immediate medical attention.
- Contents Under Pressure: Do not puncture or incinerate container. Do not expose to temperatures exceeding 120°F (49°C).
- Ventilation: Use in a well-ventilated area. Avoid breathing vapors or spray mist.
- Storage: Keep out of reach of children and pets. Store in a cool, dry place.
Refer to the product label for additional specific precautions and first aid instructions.
3. Setup
Before applying Liquid Wrench Penetrating Oil, ensure the area is clean and free from loose debris. Shake the can well before use. For precise application, attach the included red straw to the nozzle.

Figure 2: A single can of Liquid Wrench Penetrating Oil, illustrating the attached straw for targeted application.
Video 1: This video demonstrates the application of Liquid Wrench Penetrating Oil to loosen a spark plug from an engine block and a frozen adjuster on vice grips.
4. Operating Instructions
Follow these steps for effective application:
- Prepare the Surface: Clean any loose dirt or rust from around the stuck part.
- Apply Liberally: Spray Liquid Wrench Penetrating Oil directly onto the rusted or seized component. Ensure the oil saturates the threads or contact points.
- Allow Penetration: Allow the oil to penetrate for 5-15 minutes. For severely rusted parts, allow more time, or reapply and let it sit overnight. The oil's low viscosity helps it seep into tight spaces.
- Attempt to Loosen: After adequate penetration time, attempt to loosen the part using appropriate tools.
- Reapply if Necessary: If the part remains stuck, reapply the oil and allow more time for it to work before attempting to loosen again.

Figure 3: An individual applying Liquid Wrench Penetrating Oil to a rusted automotive component.

Figure 4: Application of Liquid Wrench Penetrating Oil to a rusted bolt secured in a vise.

Figure 5: A mechanic using Liquid Wrench Penetrating Oil on a vehicle's suspension system.
5. Maintenance
To maintain the effectiveness of Liquid Wrench Penetrating Oil and prolong the life of your tools and components:
- Store the can in a cool, dry place, away from direct sunlight and extreme temperatures.
- Keep the nozzle clean to prevent clogging.
- For long-term protection against rust, consider applying a rust preventative after successfully loosening and cleaning components.
6. Troubleshooting
If a component remains stuck after initial application:
- Allow More Time: For heavily rusted or seized parts, the oil may require a longer penetration time. Reapply and let it sit for several hours or even overnight.
- Reapply: Apply additional penetrating oil to ensure thorough saturation of the affected area.
- Gentle Tapping: Lightly tap the area around the fastener with a hammer. This can help the oil penetrate deeper into the threads and break up rust.
- Heat Application (Caution): In extreme cases, carefully apply heat to the surrounding metal (not directly to the fastener if it's a critical component or near flammable materials). Heat can cause expansion, helping to break the rust bond. Always exercise extreme caution and ensure no flammable materials are nearby if using heat.
7. Specifications
| Feature | Detail |
|---|---|
| Brand | Liquid Wrench |
| Model Number | L112-12PK |
| Item Form | Oil |
| Liquid Volume | 11 Fluid Ounces per can |
| Unit Count | 132.0 Ounce (12 x 11 oz cans) |
| Item Weight | 15.4 ounces per can |
| Product Dimensions | 10.9 x 8.4 x 8.8 inches (for 12-pack) |
| Material | Plastic (container material) |
| Manufacturer | Liquid Wrench |
| UPC | 078698408804 |
8. Warranty Information
For detailed warranty information regarding the Liquid Wrench L112-12PK Penetrating Oil, please refer to the product packaging or contact the manufacturer directly. Warranty terms and conditions may vary.
9. Support
If you require further assistance, have questions about product application, or need technical support, please contact Liquid Wrench customer service. Contact information can typically be found on the product label or the official Liquid Wrench website.