Tar removal off sandstone

[tino8358]

I'm quite new to pressure washing and a customer has some spots of tar on a some of the sandstone papers, any ideas for a good product/method to get this off please.

It has just been laid so is covered in a layer of dried concrete residue, would a hypo wash sort this out beforehand or just straight pressure washing

Video is attached also...

 

[Pjj]

I'm quite new to pressure washing and a customer has some spots of tar on a some of the sandstone papers, any ideas for a good product/method to get this off please.

It has just been laid so is covered in a layer of dried concrete residue, would a hypo wash sort this out beforehand or just straight pressure washing

Video is attached also...

Hypo isn’t what you want for this , you need something that will dissolve tar if it’s only a few spots I have used petrol on a rag before but not recommending this way due to fire hazard but it works

 

[Truckcab79]

I’ve got oil and tar off with petrol and a blowtorch before but as said it’s hardly the safest option and you can damage the stone if you overdo it.


I’d be surprised if it doesn’t come off with the thinnest ‘pencil’ jet on your PW though. I find most tar / bitumen / paint stains are just on the surface and blast off quite easily.

The cement residue you’ll only shift with brick cleaner but go easy with it. It always comes with warnings that it shouldn’t be used with sandstone as it can bring the iron out and leave rust stains. However I lay patios as well as clean them and never had an issue. Secret is to flood with water before and after. Even more important is to warn client of what ‘could’ happen. It mostly won’t but you’re golden either way if you’ve told them it might and they’ve agree to try it.

 

[Iron Giant]

A citrus-based tar remover like Tar & Glue Remover | ObliTARate | Car cleaning products this is a gel formula others on offer are a liquid spray I've not had a need to use this but it might be just the job more so with it being a gel which may be better with sandstone.