Once I packed the grout in when it was wet, it was darker, now most of areas dried to the original powder color but some areas still have mixed grout "wet" color and some have in-between color. Color IS NOT uniform, some areas look darker than others. If I SCRATCH it hard with my fingernail, powder comes off little by little.ģ. If I push it hard with my fingernail, it does not dent. Color is warmer than Polyblend swatch (CBP told me that polyblend swatch for #512 is the same as for Prism, is it true? The color sure looks different on the test board and the Polyblend swatch).Ģ. It's been 12 hours and here are the results:ġ. I wrang the heck out of my sponge and even dabbed it and my hands on a dry towel every time after wringing the sponge. Started cleanup (don't want to wait longer than 30 min do I :)?) I waited for 30 minutes and could still push it with my fingernail fairly easily. Was very difficult to pack it into the grout lines. It more resembled a very bottom of a chunky peanut butter jar (very stiff). Consistency was in no way like peanut butter. Followed instructions exactly, DID NOT add additional water. Mixed by hand with a margin trowel on the bottom of a bucket. Mixed 1 lb of Prism #512 (light smoke) with 111 ml of water. If we need to we can have a rep come out and take a look at the job.Ī piece of CBU, 13x13 glazed porcelain tiles FlexBonded to CBU with 3/16" grout lines. If you could contact me at 80 opt.3, then you can ask for me and we can discuss it further. This additional moisture can hurt the grout. Sometimes the spoging process is used to clean the tile rather to shpe the joints and the grout is spoged 2,3,4 times in order to get the tile clean. Too much water can cause the grout to be soft. This can cause problems.ī.) Too much water during the sponging process. When you 1st add the water to the product it appears that it is not mixing in properly and the tendency is to add more water. There is a sealer in the grout and there is a learning curve to the proper mixing of this product. I understand that you have already talked to someone with Customs and some of these things have already been dicussed, but for the interest of the guys on this sight I'll revisit some of the problem causer with this product.Ī.) Too much water in the mix. Unsanded also has a tendency to have many pinholes and streaks while you work with it so you have to be vigilant while you grout.There could be a number of things that could have a occured. Mapei FA eliminated the need for unsanded with its fine aggregate technology and essentially fazed it out. Unsanded is intended for 1/16 joints or smaller and to help prevent micro scratches on more scratch prone tile like glass or metal faced tile. I don't recommend unsanded in showers or very wet areas as it will shrink and crumble over time. I would definitely look up some videos on how to install. I put a bit of dawn soap in my wash water to help clean that greasy residue while it's still fresh. If you do epoxy, definitely go with 1 quart, it doesn't dry as fast as the mapei FA but it's difficult to wash as well. They come in 1 quart and 1 gallon for commercial. Mapei actually has epoxy that I almost work with exclusively. If that's the size of your tile you should have an easier time with grouting and cold water is a must. It seems like many people recommend 511 impregnantor sealant. Also even though they say it's not "required" we do plan on using a sealant. This is our first tile job but my husband has run into zero issues with what we have done so far so I'm confident that he can use either of these products. From what I've read people say Mapei is a pain to work with because it dries really fast and other people mention that Custom Prism is easy to work with but dries lighter & doesn't cure. I've narrowed it down to these 2 as our options. Do you have experience using either of these grouts? Which one would you recommend and why? Are the colors similar to the photos or lighter? Mapei Ultracolor would be in Pearl Gray or Custom Prism would be in Medium Gray. We are about to put up the tile with Schluter All Set and now we have to decide what grout to use.
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