Würth Rost Off Blue Ice is a professional rust-releasing penetrating spray designed to help free heavily corroded and seized threaded connections, supplied as one 400ml aerosol can.
Its distinctive cracking effect rapidly cools the treated metal surface to approximately -45°C, producing microscopic cracks within the corrosion layer. This helps the active ingredient penetrate deeply between seized components, making stubborn rusted nuts, bolts and threaded connections easier to dismantle.
Product Specifications
- Brand: Würth
- Product: Rost Off Blue Ice
- Würth article number: 0893241
- Product type: Rust remover / penetrating release spray
- Container: Aerosol can
- Container size: 400ml
- Quantity supplied: 1 can
- Cooling effect: Down to approximately -45°C
- Visual cold indicator: Treated area turns blue from approximately -5°C
- Application temperature: -10°C to +40°C
- Density: Approx. 0.73g/cm³ at 20°C
- Silicone-free: Yes
- Acid-free: Yes
- Resin-free: Yes
- AOX-free: Yes
Key Features
- Extreme cooling creates a cracking effect within the corrosion layer
- Helps release heavily rusted and seized threaded connections
- Excellent creeping and penetrating action
- Blue visual indicator shows when the required cooling effect has been achieved
- Helps loosen seized nuts, bolts and screws without unnecessary force
- Contains corrosion-protection additives
- Silicone-free, acid-free, resin-free and AOX-free
- Ideal for demanding automotive and workshop dismantling work
Typical Uses
- Seized nuts and bolts
- Corroded threaded connections
- Suspension and chassis fasteners
- Exhaust and underbody fasteners
- Engine and mechanical repairs
- Vehicle restoration and dismantling
- Workshop machinery and equipment
How to Use
Shake the aerosol thoroughly before use. Spray the seized connection until the treated area turns blue, indicating that the cooling effect has been achieved. Allow the penetrating agent time to work into the corrosion before attempting removal. Repeat the treatment where necessary on particularly stubborn connections.
Important Application Note
Use only in accordance with the product instructions and observe the safety information on the aerosol can. Rost Off Blue Ice is primarily a rust-release and dismantling aid and should not replace a specified long-term lubricant where one is required.
What's in the Box?
- 1 x Würth Rost Off Blue Ice 400ml aerosol can
Why Würth?
Würth supplies professional workshop chemicals, tools and consumables for demanding automotive and trade environments. Rost Off Blue Ice combines powerful penetrating action with an extreme-cooling cracking effect to help make removal of stubborn corroded fasteners faster and easier during servicing, repair and restoration work.
| Model | Generation (Mk) | Sub-variant | Year Range | Engine | Transmission |
|---|
No specific vehicle compatibility – universal workshop / maintenance product.
| Manufacturer | OE / Reference Number |
|---|
No applicable vehicle manufacturer OE reference – universal workshop / maintenance product.