Forum: Block Paving
Topic: Block paving disaster
started by: Eds9332
Posted by Eds9332 on 17 Dec. 2016,22:22Hello,
So I decided to rejuvenate my block paved driveway, I used a Karcher jet wash to clean, resanded with Kiln dried sand, then sealed with Thomsons sealer (Novice mistake)
The problem I have is that I didn't sweep all the excess sand away before sealing so there are quite a few blocks that have impregnated sand on top. I have tried removing the sealer but no joy. I have subsequently left the block paving in a mess.
Any advise would be appreciated
Posted by Eds9332 on 18 Dec. 2016,12:38Any one? How can I remove the sealant from the blocks?
Posted by R&A Pressure Washing on 18 Dec. 2016,12:59To remove the Thompson's shite you need a product called Mira strip, from Tiling Logistics, or you can use heat (steam) to remove, either way a messy job.
Posted by Eds9332 on 18 Dec. 2016,17:02Thanks for the reply, I was thinking of renting a motorised power washer to strip the sealant back, would this do the job?
Posted by R&A Pressure Washing on 18 Dec. 2016,19:00
Nope, it is a glorified glue the Thompson's crap so either the solvent which is the Mira Strip or heat as in a Hot pressure washer, you'll need to go up to around 100 degrees plus, as I said it is a very messy job, believe me I have removed loads of the shit, you'll also need to allow time, as around 25-30 sq meters a day is about all you'll get removed.
Posted by seanandruby on 18 Dec. 2016,21:28Done a few jobs where we lay blinding, powerfloat. When it's dry cover the blinding in wax. On top of that we lay a proper re-inforced slab, do the walls that hold the slab. Once it is all cured dig out underneath. Once it's all dug out the blinding is broken down from under the slab. Why am i telling this story? Because the wax is left and has to be removed, that's where the hot jet wash comes in and as Roger says: it is a dirty / messy job, especially from under the wax. I'm wondering if it is quicker to take up blocks and lay new
Posted by Eds9332 on 18 Dec. 2016,23:33Thanks for the advise, my driveway isn't big so shouldn't be too time consuming.
Any advise on how to apply Mira strip?
Posted by seanandruby on 19 Dec. 2016,08:55Just google Mira strip directions for use and it comes up in pdf format. Says: not to mix it, or dilute it with anything, leave it on for 20ish minutes. If you follow istructions you'll be fine.
Posted by Eds9332 on 20 Dec. 2016,20:35I have placed an order for the miracle mia strip,so will let you
Know if I have any success.
I have used Kingfishers solvent no 2, (paint thinner) which was recommended by them, However it has discoloured the blocks and didn't work, when the drive is wet it disappears, how can I bring the colour back so it's all uniform? Sealant?
Posted by R&A Pressure Washing on 20 Dec. 2016,21:30
Don't know that product, but the fact that it is called a "thinner" is not going to be the right product IMO, as there sounds like there is still so Thompson's rubbish left behind. Can you post a photo of the paving? one wet & one dry? You need to remove the Thompson's completely which the Mira Strip will do, sometimes you do have to apply it twice, really depends how thick you applied the rubbish sealer in the first place. This isn't a dig at you, it is just that the product you have used is so rubbish that I don't know how they get away with selling it.
Posted by Eds9332 on 22 Dec. 2016,12:29Ok pictures of the affected areas
< upload pic >
Posted by R&A Pressure Washing on 22 Dec. 2016,12:45That looks like residue left on the paving from the sealer, so unfortunately the Kingfisher stuff didn't remove it all, was the Kingfisher product just an Xylene based product? if it is then that's the reason why. Xylene will start to remove the Thompson's but drop it back down to quick thus leaving the residue. As I said the Mira Strip will get rid of it.
Posted by Eds9332 on 28 Dec. 2016,23:08So I gave the Mira strip a go today but it didn't seem to remove the mighty Thomsons sealant. Any other suggestions/products?
Posted by R&A Pressure Washing on 28 Dec. 2016,23:21
How long did you leave the Mira Strip on for? How cold was it when you were doing this?
Posted by Eds9332 on 29 Dec. 2016,00:10It was pretty cold today, left on for around 5-10 mins whilst agitating with wire brush
Posted by R&A Pressure Washing on 29 Dec. 2016,11:09
Couple of things went against you there, too cold, you'll find when it is around freezing some chemicals work very slowly almost not at all, and the dwell time was no where near long enough, when I'm doing a strip I leave the Mira on for at least 30 mins with Thompsons, just don't let it dry out (so add more if it is drying) Stiff nylon brush might be better, but again I have a low speed rotary machine to do this. I'd wait until the temperatures pick-up before having another go, 10 degrees and upwards would be better, and a longer dwell time, with the pavers soaked in Mira Strip.
Posted by Eds9332 on 29 Dec. 2016,11:17Thanks for the advice, I was putting the Mira on neat, however it says on packaging to dilute?
Posted by R&A Pressure Washing on 29 Dec. 2016,11:30
No use it neat, do not dilute