Weatherpoint 365 staining???

[smallgarden]

I have used marshalls weatherpoint 365 loads of times and I have never had any "temporary" staining last more than a couple of wash downs. On a recent project, using it on granite paving, there is terrible staining over 75% of the stone. The paving was soaked!! as I always do, and water added as brushing in, struck off, more water, brushed off. Basically all as manufacturers directions yet for the first time it has left this horrible patchy seal all over the slabs which just doesn't want to budge. I have tried soapy water and scrubbing a small area and even testing a small area with a pressure washer but it will not budge. Various online searches say it is "temporary" and the "great British weather" will shift it in a couple of months. That's been 4 weeks and I was hoping to see some improvement but Im beginning to panic and wondering if it will ever come off!!
Can anyone tell me if they have had a similar problem and if there are any cleaners you can recommend that will speed things up! Thanks

[lemoncurd1702]

Maybe worth calling tech support at Marshalls.
I've used 365 on granite with no problems other than the temporary oil slick

How long did the bedding have to cure before using the grout? Pretty sure I've used it day after with no issues though.

[smallgarden]

It was a few days after as it took a couple of days to lay. I'm praying it goes in the couple of months it mentions as I can imagine the hassle it will be getting marshalls involved. I will be very surprised if they don't just say I didn't use enough water but as most landscapers know the wetter this stuff gets the easier it is to brush about. If it's not gone in the next 3 weeks I will bite the bullet though.

[jc1982]

Hello, I had this problem last year with a slate patio. The staining (small spots) was terrible at first but now 12 months later it has pretty much disappeared. No amount of scrubbing did anything it's just weathered away over time.

[London Stone Paving]

Don't panic, it will go. 100%

[LJPH]

I am an amateur! Today we have pointed our few months old indian riven stone path and patio with weatherpoint 365. The mixture just wont seem to wash or brush off the uneven surface of the stone slabs and i am worried it will set like concrete on the top of my lovely slabs and make them look old and awful. Have i done something wrong? Will it disappear soon so i can seal them to preserve the colour? I would be grateful for any advice out there. Cheers. Ljph

[GB_Groundworks]

some photos would help you can email them to me if you can put them up. giles at gbgroundworks dot com

on really riven surfaces we don't brush it about we keep it to the joints working it along them with small brush or squeegee as it does tend to pool in the dips and hollows etc but a good hosing and brushing technique does move it. if you left it though with a big build up you'll need to remove it

[LJPH]

Thank you, that is helpful. I think we made a mistake in brushing it about like on youtube! I will try the hosepipe and more brushing today. I think some of it will be forever in the grain of the stone now but perhaps i can get the worst off. How long do you think before i can seal it? It looks better when wet so perhaps sealing will brighten it up again. Thanks v much for your help .

[RAPressureWashing]

Don't seal the paving until you have removed any or all residue .

[Jamiekrauhaus]

I have exactly the same problem... I have granite slabs. Laid them last year, followed the instructions and had staining in one area only. 12 months later and it's still there.

A week ago I bought another tub to finish off.... Stained everywhere!!! Looks terrible. I hosed it down and soaked the patio before using it!!! Really need some help with removing it!!!!

[exoticpete]

Hi all, Marshall's do not recommend using 365 on granite particularly the dreaded light granite which is like a sponge we have used it but very carefully, on the subject I used to use the light granite all the time years ago with no problems regarding staining from mortar or picture framing I believe this stone was from Portugal however the stuff we are sold now is all from china and I believe its quality has dropped massively.

[Tony McC]

The Chinese 603 granite is, as Pete says, like a sponge, and it's a bugger for sucking in oils and resins from some of the brush-in mortars, both 1- and 2-part. The Portuguese granite is much less porous, so notably fewer problems, but then it is usually a little bit more expensive.

7 or 8 years ago, myself, a resin mortar supplier and a major importer of Chinese granite played around all summer long trying to find a way to ensure the 603 wouldn't be buggered up by using a resin mortar and the only method we found to work was by pre-sealing the damned stone with a seriously good quality, high solids content sealant, and that, sometimes, two coats were needed.

Some resin formulations then had a problem bonding to the sealed edges of the stone, so all sorts of half-baked ideas were tried to find a way of sealing only the upper surface of the stone, leaving the vertical edge faces unsealed, but everything we tried either failed or cost too much to arrange. Eventually, a specific resin formulation was chanced upon and it had no problem bonding with sealed surfaces (or anything else, for that matter!), and so the conclusion was that, for 603, pre-sealing and then a tried and tested resin mortar was the best way forward.

The non-disclosure agreement is still in place so I can't say who was involved or what products were found to work (or fail) but I think it's safe enough to state that, for 603, pre-sealing is the way to go. (Alternatively, buy a decent quality alternative granite!)