Würth Rost Off Blue Ice is a professional rust-releasing penetrating spray designed to help free heavily corroded and seized threaded connections, supplied here as a pack of 3 x 400ml aerosol cans.
Its distinctive cracking effect rapidly cools the treated metal surface to approximately -45°C, creating micro-fine cracks within the corrosion layer. This allows the active ingredient to penetrate more effectively between seized components and helps loosen heavily rusted nuts, bolts and threaded connections.
Product Specifications
- Brand: Würth
- Product: Rost Off Blue Ice
- Würth article number: 0893241
- Product type: Rust remover / penetrating release spray
- Container: Aerosol can
- Individual container size: 400ml
- Quantity supplied: 3 cans
- Total quantity supplied: 1.2 litres
- Cooling effect: Down to approximately -45°C
- Visual cold indicator: Sprayed area turns blue at 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
- Powerful cracking effect produced by extreme cooling
- Helps break through corrosion around seized threaded connections
- Excellent creeping and penetrating properties
- Visual blue cold indicator shows when the required cooling effect has been reached
- Helps loosen heavily rusted nuts, bolts and screws
- Contains corrosion-protection additives
- Provides protection against further corrosion
- Compatible with rubber and seals
- Silicone-free, acid-free and resin-free
Typical Uses
- Seized nuts and bolts
- Corroded threaded connections
- Automotive suspension and chassis fasteners
- Exhaust and underbody fasteners
- Engine and mechanical repair work
- Workshop machinery and equipment
- General dismantling and maintenance work
How to Use
Shake the aerosol thoroughly before use. Spray the seized connection from a short distance until the treated area turns blue, indicating that the required 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 heavily seized connections.
Important Application Note
Remove overspray promptly from sensitive or painted surfaces. This product is designed as a dismantling and rust-release aid and should not be used as a substitute for a specified long-term lubricant where one is required.
What's in the Box?
- 3 x Würth Rost Off Blue Ice 400ml aerosol cans
- Total volume: 1.2 litres
Why Würth?
Würth supplies professional workshop chemicals, tools and consumables for demanding automotive and trade environments. Rost Off Blue Ice combines strong penetrating action with an extreme-cooling cracking effect to make removal of stubborn corroded fasteners quicker and easier during servicing, restoration and repair 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.