Paving Block Sealant

[Scally-Ho]

A popular sealer in my coastal area is Kilrock Pro and from what I've seen after it has been down a while is all good.

 

[johnny2007]

No, you can't.
I tested it on a bit and when dry it peels off after a couple of weeks.
I used the Wickes at the back, where the slabs had not been sealed.
At the front, where I used Thompson I will have to wait another couple of years for it to wear off.

 

[johnny2007]

A popular sealer in my coastal area is Kilrock Pro and from what I've seen after it has been down a while is all good.

It's water based like the Thompson's.
I won't try that after the bad experience.

 

[freddiemercurystwin]

None, it was newly installed, with new silka sand in the joints

Surely you gave it a decent brush to remove any trace of any dust sand etc beforehand? It looks like you can still see plenty of sand on the surface/around the edges?

 

[Lynshut]

Surely you gave it a decent brush to remove any trace of any dust sand etc beforehand? It looks like you can still see plenty of sand on the surface/around the edges?

It was brushed well at the time but rained since and that seems to have kicked up some of the sand

 

[accelerator]

I'm no expert, but what you could do is:
- Make sure it's clean ready for sealer.
- Wait until it's fully dry.
- Use your photo to apply the original product to just the dark looking bricks, as they are the ones that need more sealer.
- See if that fixes it.
- If not, consider further suggestions from here.

 

[Lynshut]

I'm no expert, but what you could do is:
- Make sure it's clean ready for sealer.
- Wait until it's fully dry.
- Use your photo to apply the original product to just the dark looking bricks, as they are the ones that need more sealer.
- See if that fixes it.
- If not, consider further suggestions from here.

So you’d say it’s the darker blocks that need more sealant? I was thinking the opposite

 

[accelerator]

So you’d say it’s the darker blocks that need more sealant? I was thinking the opposite

Well I'm guessing, because they would look darker if they have got damp. After rain, touch them to see if they are more damp than the light ones, I think they probably will be. In that case, it's the dark bricks that lack sealer as water is getting into them.

 

[jj4091]

Try heating one of the dark blocks with a hot air gun or similar. If it lightens up then it is obviously damp that is causing the problem. The question is where is the moisture coming from. Is it a lack of sealer on the top surface or is it permeating up from underneath which might suggest it was the way it was installed or you have excessive water underneath prehaps fron a broken drain etc.

 

[Lynshut]

Try heating one of the dark blocks with a hot air gun or similar. If it lightens up then it is obviously damp that is causing the problem. The question is where is the moisture coming from. Is it a lack of sealer on the top surface or is it permeating up from underneath which might suggest it was the way it was installed or you have excessive water underneath prehaps fron a broken drain etc.

I suspect it’s not underneath as no evidence of anything happening prior or when the old driveway was ripped up.