Simply Auto Underbody Spray - White - 500ml - SP-041

Simply Auto White Underbody Spray is a durable, rubber-based coating engineered to protect vehicle...

Best current price£10.09from B&Q

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B&QB&Q - Auto White Underbody Spray 500Ml Rust Protection For Cars Vans 4X4S
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eBaySimply Auto White Underbody Spray 500ml Rust Protection for Cars Vans 4x4s
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Product Information

Full details

Simply Auto Underbody Spray is an ideal maintenance solution for car, van, and 4x4 owners looking to preserve their vehicle's chassis against the elements. It provides a robust, rubber-based barrier that excels at preventing rust and corrosion from salt and moisture, though it requires a clean, dry surface for optimal adhesion and longevity.

All features

Model Part NumberSP-041
BrandSimply

Extended Product Information

FAQs

Can I apply this over existing rust?

While it can seal, it is best practice to remove as much loose rust as possible with a wire brush before application to ensure the coating adheres to the metal.

Is this product paintable?

This formula is designed as a protective, functional coating rather than a decorative finish, and it is generally not intended to be painted over.

Can I use this on my exhaust system?

No, this product is not heat-resistant and should not be applied to the exhaust or any high-temperature engine components.

How long does it take to dry?

Touch-dry time varies based on ambient temperature and humidity, but it typically takes a few hours to set; full curing may take 24 hours.

Is it safe to get on the car body paint?

No, it is designed for the underbody only. If it contacts painted surfaces, wipe it away immediately with a suitable solvent before it cures.

How many cans do I need for a standard car?

Usage depends on the size of the vehicle and the desired thickness, but 2-3 cans are usually sufficient for a thorough coating of a standard car chassis.

Troubleshooting

Spray nozzle is clogged

Remove the nozzle and soak it in solvent or replace it with a spare if available; always invert the can after use to prevent this.

Coating is peeling off

This usually indicates the surface was not clean or dry enough during application; remove the loose material, clean the area again, and reapply.

The spray is dripping or running

You are applying too much product in one pass; use thinner coats and allow for more drying time between layers.

Pros and Cons

Pros

  • Durable rubberized finish
  • Excellent protection against salt and rust
  • Helps dampen road noise
  • Easy aerosol application
  • Suitable for multiple vehicle types

Cons

  • Requires thorough surface preparation
  • Not suitable for use on moving engine parts
  • Overspray requires careful masking
  • Requires a well-ventilated area for application

Setup, Compatibility & Care

To ensure proper adhesion, the vehicle underbody must be thoroughly cleaned to remove all traces of grease, oil, dirt, and loose rust. Once clean, allow the surface to dry completely. Mask off any areas you do not wish to coat, such as exhaust systems, brake components, or moving suspension parts. Shake the can vigorously for at least two minutes before spraying, and maintain a distance of approximately 20-30cm from the surface. For best results, apply multiple thin coats rather than one heavy, running coat. After use, invert the can and spray briefly to clear the nozzle. Store in a cool, dry place away from direct sunlight.

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