Wanted: Vehicle under seal

Prep work important. A proper applicator will remove all loose and surface rust and apply a rust converter, before applying the coating.
 
buy a land rover they are self coating with oil 😆
A lot of sense in fact in spraying the underside with old oil. Underseal if done badly will often allow the ingress of water between it and the metal of the car. Which is then trapped below the coating of underseal. Therefore in fact being a cause not only of rust but hidden rust. My advice is unless you do proper preparation you are actually potentially creating a future problem.
 
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Underseal is old hat you need some flexible coating like Dintrol or spray the underside (illegal) with used oil like all oldies did that then drips into the street environment.
 
Steam clean the old stuff off, wire brush any crusty bits and apply Dinitrol and try to get it all the cavities as well. I had my 15 year old 4x4 done about 9 months ago cost me £800 money well spent.
 
I do the TD5 every other year with buzzweld blackit. Over the years I've used waxoil, drinitol and various homemade concoctions.

I looked into a alternative and came across a highly recommended company called buzzweld. They offer some premium products which tbh cost more than I wanted to pay but at the time were experimenting with a new budget line called "blackit"

I gave it a go and it's fantastic. Easy to apply, and doesnt leave a oily tacky to the touch finish, drys like paint but very durable. 6 one litre shultz cans give a TD5 two good coats. Not the best photos but it gives you an idea
 

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+1 for Lanoguard. I did my Landcruiser after giving the chassis a thorough clean. Very easy to apply and once dry I tested it with the hose and water just beads off. I got the kit as above and did the chassis twice with some to spare.
 
It's a fair bit of labour, and equipment, to a do a proper job that you can guarantee to a customer. Clarting Lanogard on a manky chassis is easy.

On my car I had my wheels, shocks, arch liners, heat shields removed, all washed, all the rust taken back, it wasnt just slapping on Lano as you seem to think.

Cost nowhere near that in labour and materials.
 
On my car I had my wheels, shocks, arch liners, heat shields removed, all washed, all the rust taken back, it wasnt just slapping on Lano as you seem to think.

Cost nowhere near that in labour and materials.
Car. Not 4x4 ? Was it done by a professional approved applicator ? To be honest, I don't really want to get into a debate. A professional outfit doing it over a working week will charge £800 or more depending on how much work is involved in stripping down, cleaning, rust removal, chemical and coating used.
You can do it yourself, or pay a professional. Each to their own and as long as everyone's happy, ideal.
 
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