Undersealing Your Car

The first thing to do is give the vehicle an initial inspection and assessment.Then it is important to clean the underside of the vehicle, removing all dirt and loose rust or flaking underseal/paint. Any plastic, inner wheel arch covers should be carefully removed at this point to gain access to the areas behind - which are often secretly harbouring months, if not years of mud and dirt accumulation.
Then the brakes and exhausts should be carefully masked up before it is coated with durable, black, rust inhibiting underseal.
Underseal is a thick resilient coating which protects against impact damage from small stones, which would rapidly chip ordinary paint, allowing rusting to begin.
A bitumen-based compound was used originally, but after approximately a decade this becomes brittle and water can become trapped between the underseal and body metal, ironically creating a more favourable environment for rust than if no underseal was applied at all. Wax-based underseals do not have this disadvantage but can be eroded and eventually washed off by enthusiastic use of a hot pressure washer. Rubber-based underseals are also sometimes used.
Waxoyl is also advised to be injected into all the crossmembers.All the necessary interior trim is carefully removed. Rust inhibiting cavity wax is then applied at high pressure inside every box section such as the pillars, doors, sills and boot etc.Sometimes it maybe neccessary to drill a small hole to enable the waxoyl to be injected into the cavitys that are otherwise impossible to get to,then these are sealed with a small black, plastic plug to retain a standard appearance.
When the treatment is complete, any necessary parts are unmasked. Any removed trim is carefully refitted and any overspray would be cleaned from the bodywork.

This results in a neat, weather proof 'factory look' finish
The process usually takes around 8 hours - depending upon the vehicle size, type, condition and preparation time required. Please note however that larger vehicles may require slightly longer than a day to complete.
The benefits of a complete treatment include:are peace of mind in the knowledge that your car is protected,your car retains its highest possible resale value,reduced maintenance & repair bills
and reduced road noise (‘drumming’)

Dave Burton
www.bargain-motors.com