mapei grout drying patchy

Discussion in 'Tiling Materials Forum' started by garythetiler, Mar 7, 2014.

  1. garythetiler

    garythetiler Active Member Registered Trader

    doing a job at the moment using grey polished porcelain tiles the designer asked me to do a sample board to try and colour match the tile to the grout , I cut down some off cuts into 150 squares and stuck them on a piece of warm up board for the grout samples I used 3 different mapei ultra colour grouts ,manhattan, cement grey and medium grey and tile master grout 3000 light grey , the tiles were fixed with tilemaster ultimate grey , the mapei grouts have all dried patchy i raked them out and redid them and still the same result I am a bit puzzled that all 3 were affected , i may have to mix the mid grey tile master and the light grey to get a good colour match as this was the only grout that didnt go patchy
  2. Pro-Tilers

    Pro-Tilers Admin Administrator Registered Trader

    I would advise you not to do that Gary for obvious reasons....
    to avoid problems with Mapei grouts I find that if you "shake" the bags up prior to opening them helps alot.......(we all think we do it properly, but we don't generally!)
    as for mixing colours together I have found that this is fine in a small area if you mix loads more than you need to do the job and keep the quantities even.....I.e 5kg light and 5kg mid etc......(dry).......then add water!

    if you are having problems with the mapei grouts I would just ask the client to pick between the two grout 3000 samples........job done and no headache?
    I know you want to get the grout colour closer but you could end up making it REALLY patchy buy tring to mix your own up!...

    all the best.....hope you, brian and luke are well...

    Lee
  3. Dave

    Dave Tiling bod Staff Member Registered Trader

    I tend to find that with ultra colour it can hold water containing polymers on the surface but I combat this by giving the joints a final strike with a sponge just as the grout is about set ... This then usually gives an even colour.

    Just the way I seem to get it to work...thought I would just add my way to see if it works for others.
  4. Dave

    Dave Tiling bod Staff Member Registered Trader

    But I must also say , I rarely use mapei now ... It's either weber pro grout or TM 3000
  5. Pro-Tilers

    Pro-Tilers Admin Administrator Registered Trader

    My grout of choice is Mapei ultracolour.........closely followed by Tilemaster grout 3000.......
    but I must admit I treat bags of grout like cans of spray paint......5 mins of rigorous shaking........

    hehhehehee
  6. Dave

    Dave Tiling bod Staff Member Registered Trader

    Do you sing as you shake as well . :laugh:
    Pro-Tilers likes this.
  7. Tiled to Perfection

    Tiled to Perfection New Member

    Going of ultra colour myself the now. Find it getting harder to work with all the time like Lee. Will try what your doing Dave.
  8. Pro-Tilers

    Pro-Tilers Admin Administrator Registered Trader

    Hell yeah..........
    Dave likes this.
  9. ray

    ray Active Member Tiling Supplier

    try washing off with warm gives even drying time
  10. Dave

    Dave Tiling bod Staff Member Registered Trader

    IMHO , it is just water , warm,cold,hot that is the issue with all polymer modified grouts.

    Leaving residual water containing polymers leads to polymer leaching at the joint surface.

    Leaving the grout to set up as much as possible to avoid the grout being wet up when washing off works for me.

    This in turn gives a reduced risk of pulling grout from the joint ... The use of a scotch pad helps with the first wash , as we all know how difficult modified grouts can be to remove from tile surface on that first wash , then I make sure the final wash leaves as little water sitting on the joint surface as possible.

    Keeping the water clean ( changing regularly ) is a must IMO as well... as this contains polymers when dirty with wash down water.

    Hope my method helps others who tend to get colouring issues...
  11. Andy Carroll Tiling ltd

    Andy Carroll Tiling ltd Member Registered Trader

    Spot on Dave .....
  12. Diamond pool finishers

    Diamond pool finishers New Member Registered Trader

    I think you have worked it out Dave, as we use a lot of coloured grouts now in pools and we always scrub -over with white pads first then a wash, then a last wash ,usually does the trick :)
  13. Pro-Tilers

    Pro-Tilers Admin Administrator Registered Trader

    I have to admit that I am a big fan of Ultracolour..... over the years I have got use to it....(we all get used to stuff right?)
    because it sets so fast I tend to do one or two areas at a time.....and clean up (depending on the type of job naturally!)....

    personally, it is still my grout of choice.....but opinions are like *********........everyone has one!

    all the best

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