The question to seal or not to seal porcelain tiles is becoming one of the most asked question in the Nerang Tiles showroom. Customers are becoming more informed about different products and it all gets a bit confusing when you are deciding between natural stone, natural marble, natural timber or porcelain tiles. We all know that natural products such as stone, marble and timber do require routine sealing but do porcelain tiles? We couldn't answer it better than Scott Worthington from Aqua Mix via tiletoday.com.au. Check out his article below. If you have any questions please give the experts at Nerang Tiles a call on 07 559 61 916. Update Since the writing of this article it is important to note there have been significant advancements in the manufacturing process of porcelain tiles. The advancements have drastically improved the quality, durability and aesthetics of porcelain tiles. Modern technological advancements in porcelain floor and wall tiles have made sealing almost all porcelain tiles unnecessary. The majority of porcelain tiles in the market are glazed. This means that they have less than 0.5% porosity and do not require sealing. In fact, only specialized sealers are suitable as most will not penetrate the glaze or be absorbed by the glazed porcelain tile. For more information about the qualities and benefits of glazed porcelain tiles see here. The question of sealing porcelain is fast becoming one of the most asked in the industry. To fully understand the answer one must know a little about the history and make up of porcelain tile. What is Porcelain Tile? Porcelain as we know it today was first pioneered in Italy by several notable companies. Porcelain is made from a more pure blend of high quality clay than used in “normal” ceramic production, utilizing predominantly china or porcelain clays. These have high silica content and result in materials that have all of the characteristics of silica itself once fired, namely low water absorption, high chemical resistance, high abrasion resistance, and good overall hardness. The pioneers of this technology recognized this high performance and marketed it accordingly with porcelain becoming the benchmark. One of the most accessible technical features used by the marketers to highlight this high performance aspect was water absorption. The European standards (Tolerances ISO UNE EN ISO 10.545-3) set water absorption at less than 0.5%. In many cases the European manufacturers bettered this impressive standard with common water absorption being less than 0.1%. So, with such low water absorption and with the clay being milled and spray dried to such small particle size distributions before pressing and then firing to over 1200 degrees Celsius, the resulting porcelain DID NOT NEED SEALING. This should therefore be the end of the story. However it is not. There are now many types of porcelain, especially polished, that do absorb liquids and hence can benefit from sealing. Why is this so? Porcelain Today The reason for this change is simple. Today we have so many different kinds of porcelain, manufactured with different standards in different countries to meet varying pricing and performance demands. In contrast, originally a small select group working to a defined set of high performance standards manufactured all porcelains in Europe. By default it set the definition of “porcelain”. However this definition is no longer something that can be attributed to all products labeled porcelain. Consequently where in the past we recommended no sealing for “porcelain”, we now ask for more information about the particular porcelain before answering. The fact is that there are now many porcelains that have a rate of water absorption higher than the original standard thus requiring a sealer to perform properly. To ascertain if a porcelain will benefit from a sealer application do a simple water test. If after several minutes water is absorbed then the tile can stain and will benefit from sealing. In general it is the polished products that are the most applicable, especially some of the “honed” or satin materials that are being offered. Which Sealers Work? The unique composition of porcelain makes it a difficult product to seal. It has low water absorption and a very fine highly compressed crystal lattice making it difficult for many conventional sealers to bond. There are only two types of sealers that will successfully protect porcelain, Penetrating type products and also Floor Finishes. Penetrating or Impregnators These sealers cure and work below the surface of the tile. They typically leave the tile looking natural and have no adverse effect on the tiles coefficient of friction (slip resistance). It is commonly thought that the most successful penetrating sealers for porcelain are solvent based rather than water. The rationale is the solvents have a smaller molecular structure than water making it easier for them to penetrate the dense porcelain surface. This is valid to a certain extent. However if the application technique of a premium water base product (such as Aqua Mix Sealers Choice) is modified to allow the sealer to dwell for longer than the resulting performance is superior to traditional solvent sealers. With most sealer companies trying to enhance productivity and quality control it is however believed to be counterproductive to change the normal and recognized method of penetrating sealer application. Therefore companies such as Aqua Mix have developed specialised porcelain sealers. These are at present solvent based as they allow high performance as well as no modification to traditional application techniques. These new generation solvent sealers are much improved compared to the traditional versions. Aqua Mix Pro Solv 10 for example is a water dispersible solvent. It is non-flammable, non-toxic and has very good vapor transmission. It will not yellow and can be safely applied in hot temperatures, as its flash point is very high. It is a premium sealer in that it offers high levels of stain resistance (especially against oils) and has a life expectancy of up to 10 years making it far superior to traditional solvents. Floor Finishes Polished porcelains hard, dense and often smooth surface makes the application of surface sealers almost impossible and is the reason why penetrating sealers, like Pro Solv 10 are the industry standard. However when a polished porcelain surface begins to scratch and wear, traditional restoration by way of wet polishing is in many cases not practical. This is where the application of a “synthetic polish” becomes a realistic alternative. However to get a surface coating to successfully bond to the porcelain surface, thermoplastic resins must be employed. Without this technology normal air cured coatings will not get sufficient mechanical bond. An example of this technology is Aqua Mix StonEndure Sealer Finish. It utilizes state of the art thermoplastic resins that when buffed with a high-speed machine gains a high mechanical bond creating a durable sealer finish with a very high gloss, very close to the original. These types of products are designed to work in the same high traffic, high wear environments as the porcelain itself. “My Porcelain Gets Dirty, therefore I need to Seal!” This is a very common statement. However it is in many cases just not true. As I have mentioned above, the main reason for sealing porcelain is to stop it absorbing things that would eventually stain. However as these sealers are penetrating they do not offer any protection to the actual surface and it is surface soiling that this statement refers to in most cases. Porcelain used to be all full body or homogeneous as it is often referred to. However there are many other techniques used today – glazed, roll feed, double charged to name a few. Moreover there are many different surface textures many of them created by the use of plastic dyes to press the tile body before firing. It is these textures that are more often than not the reason for the problems our statement refers to. A common complaint is that when porcelain is used in a car showroom or garage, car tire marks are very easily transferred on to the tile, but not easily removed. The client then assumes that a sealer will remedy the problem. However in most cases it is the very fine surface texture, characteristic of most porcelain that is abrading the tire and lodging the rubber particles in the very small fine pores of the tile. It is a typical porcelain complaint. It is very often further complicated by the presence of small amounts of grout haze left on the tile surface after installation. The solution to this problem is to clean and maintain the porcelain correctly rather than apply a sealer. Most porcelain cannot be maintained by wet mopping alone. The characteristic microscopic textured surface requires periodic cleaning with a heavy duty alkaline cleaner (for example Aqua Mix Heavy Duty Tile and Grout Cleaner) and an abrasive pad such as 3M’s Scotchbrite brand. Conclusion There is no doubt that the question of whether you do or do not need to seal porcelain is NOW a legitimate question. When porcelain was first created it was not. The only real questions then related to maintenance. However with the advent of different market requirements and the proliferation of porcelain manufacturers worldwide “porcelain” no longer can be defined by the same original technical and performance criteria. The name porcelain now encompasses a much wider range of performance characteristics and some of these can in no doubt be improved by the use of good sealers. So the answer to the question “do I need to seal porcelain” is no longer a blanket NO! The correct reply is “which type of product is your porcelain” and following some simple tests and discussion with your supplier, the answer should be revealed. Source: Aqua Mix
54 Comments
Robert R Furgason
11/3/2018 07:32:59 am
What are the simple tests that you refer to in order to identify the type of porcelain tile we have? The local suppliers just says porcelain is porcelain. We are having problems with our chairs not sliding easily on the floor without large drag and noise. I wonder about putting some type of sealant on the surface that would allow the furniture, especially chairs to more smoothly glide on the floor. The plastic furniture sliders still do not smoothly allow the chairs to move. So I am considering applying some type of surface coating that will allow better movement of the chairs. Any suggestions?
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11/3/2018 09:21:54 am
Hi Robert, tests include checking to see if there is a glaze on the porcelain, applying water as mentioned above, visual inspection for rectified vs pressed edge and by touch to identify the texture.
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Ben Dale
12/16/2018 08:36:42 am
We're having a lot of issues with tannin stains from leaves falling on our porcelain pool tiles. Would sealing these tiles make them any easier to clean?
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12/17/2018 08:16:45 am
Hi Ben, sealing will of course make tiles easier to clean as it creates a less porous surface. However, if your tiles are a glazed porcelain the sealant will not attach itself to the tiles and will rub off over time. It is best to contact your LTS to inquire what tiles you have and the best sealant that they would recommend.
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Christine
12/20/2018 12:01:53 am
This is my story
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Robert R Furgason
12/20/2018 04:48:17 am
Porcelain tile are a different material than ceramic tiles. They don’t need to be sealed as they are a much harder surface. And from our water test, there doesn’t seem to be any absorption of water at the surface of the tile. It seems you may have a grout problem. Our installation used wooden base boards and not the tile. The tile had a grout line at the intersection with the base board which looks just like all of the other grout lines. The grout used was self-sealing – at least that what it is supposed to be. We have no issues with the grout at this point about 3 months after initial installation. We used Mapei Flexcolor C.O., ivory color for the grout. Hope this is helpful.
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Christine
12/20/2018 06:29:44 am
Thank you so very much Robert for your reply. Much appreciated. Just having your response to my posting is helpful. Thank you.
Christine
12/20/2018 06:31:40 am
I would like to be notified of all comments please to my post.
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12/20/2018 09:33:13 am
Hi Christine, in some instances the porosity of porcelain tiles can be higher than usual and allow for the absorption or penetration of liquid to bleed into its body. This issue is exacerbated by darker colour grout, no matter the brand. However this is extremely rare and we have not come across this issue before.
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Christine
12/20/2018 10:39:45 am
Thank you Nerang Tiles for your prompt response. I have requested the builder and tiler (who also tell us that they've never seen this happen before) that they try grouting the same tiles (the left over offcuts) with Mapei Colour Plus to see whether the same "picture framing effect" will occur. This experiment, I felt, would put a lot more certainty into what is actually causing the problem - the grout or the tile.
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Debbie
1/11/2019 06:03:28 am
Over a year ago we had Italian porcelain tiles (12x24) put down in our kitchen/dining and half-bath areas. Unfortunately we were not made aware of the important fact that these tiles are not mopable due to the rough texture, which also has some height variances among each tile to resemble the look of slate. We love the look and soft color variances. I contacted the manufacturer and was told they need to be cleaned with a marine deck-type brush ... seriously?! was my answer. Then I asked, and how does one then rinse and extract the dirty wet residue. Needless to say this method was not a viable one! I have had to revert to paying a commercial steam cleaning company once a quarter - cost is too much to have it done more often. My million dollar question to you - is there any type of sealant or epoxy finish that can be used that would allow a mop to then glide over the tiles?
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Robert
1/11/2019 08:46:17 am
Our porcelain tile is relatively smooth but not a polished surface. We were having some difficulty sliding chairs in and out of the table. I used a car polish on the floor and this helped the friction part. However, we have not had a major problem with mopping the floor.
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1/11/2019 08:56:11 am
Hi Debbie
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Francesca Leaton
4/23/2019 08:24:21 pm
Hi Nerang Tiles
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4/24/2019 08:42:24 am
Hi Francesca
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Helen
9/10/2019 11:34:30 am
We have polished porcelain tiles laid as a splashback behind our kitchen stove. They have been sealed but we don't know which one was used by the tiler. Is it OK for those sealed tiles to be cleaned using sugar soap or is that too strong and might affect the surface?
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9/10/2019 11:48:23 am
Hi Helen, Sugar Soap will not harm glazed porcelain or fully vitrified porcelain tiles however we would not recommend it as it is not designed for washing tiles. Sugar soap is designed to prepare surfaces for painting.
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Helen
3/8/2020 08:22:04 am
Hello I hope you can help ,I have just laid gloss porcelain tiles in my kitchen ,and there is a haze round the tiles ,I have tried cleaning them to no avail ,are the tiles scraped with grouting, thank you .
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3/9/2020 08:23:30 am
Hi Helen
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Ben Melrose
4/6/2020 04:05:26 pm
Hi. Awesome arrival We just had 100 sqm of pressed Italian porcelain black external tiles laid. Thee are a non slip external tile. Do they need sealing. States has “glaze” surface and =<0.5% absorption.
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Alfred
5/16/2020 11:27:03 pm
What is the water absorption % of Italgraniti Mineral D Living Dolomite (polished) tiles? I cannot find it on Google.
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Fran
8/2/2020 05:01:53 pm
Hi
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8/3/2020 08:13:12 am
Hi Fran
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Jeremy
8/7/2020 05:17:22 pm
Hi,
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8/10/2020 08:15:06 am
Hi Jeremy
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Monique Beaton
9/22/2020 07:16:22 am
Hi,
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9/22/2020 08:35:49 am
Monique
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9/27/2020 01:08:00 am
Wonderful information about to seal or not to seal porcelain tiles, thanks a lot for sharing kind of content with us. Your blog gives the best and the most interesting information. I wonder if we can gather such practical information about it, a great post definitely to come across.
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Mike
10/28/2020 10:01:36 am
I bought enough of the tile linked below to do my bathroom floor because the box listed floors as one of the uses. After seeing conflicting info Lowe’s sure I e-mailed the manufacturer and they confirmed it’s not suitable for floors because the finish won’t hold up well to cleaning over time. I then asked if I could apply a sealer to solve the problem and they said a sealer won’t adhere to this type of tile. Do you know of a sealing type product that would work for this? Thanks!
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10/28/2020 10:04:32 am
Mike
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Sally
11/27/2020 01:03:02 pm
Hi. We have porcelain coping pool tiles around the pool. But they look very grey & I prefer them darker like when they are wet. Can I put a sealer on & if so what do you recommend?
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11/27/2020 02:14:50 pm
Sally
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chaya kotak
2/8/2021 01:31:24 am
Hi
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2/8/2021 08:50:48 am
Chaya
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3/3/2021 04:52:18 pm
Like!! Really appreciate you sharing this blog post. Really thank you! Keep writing.
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3/23/2021 12:45:38 pm
Thanks for explaining that porcelain is made with a different process nowadays, so it can sometimes need to be sealed. We will continue to compare tile types so that we can understand which materials would be least high-maintenance. Maybe we'll look into natural stone.
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4/11/2021 05:21:21 pm
Magnificent data going to seal or not to seal porcelain tiles, you're the best for imparting sort of substance to us. Your blog gives the best and the most fascinating data.
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Michelle
7/18/2021 11:10:48 am
Hi we installed Piccadilly Nero Lappardo tiles in our main bathroom floor and shower and live in a hard water area. Even though we have a softener we have significant marking on these tiles. i have tried various cleaners from vinegar to Gumpton and once CLR but if anything the damage/staining has gotten worse. Is there anything we can do to remedy this situation or is the damage done.
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7/19/2021 08:58:05 am
Michelle
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7/27/2021 11:19:19 pm
So, as you should with all building projects and materials you use, look at the recommended treatment that is prescribed by the manufacturer and take that into account. Don't forget those fine print labels!
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David
10/25/2021 09:17:29 pm
We have 200 m2 of porcelain tile
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Nerang Tiles
10/26/2021 10:14:16 am
David
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Del
11/3/2021 06:44:11 pm
Hi there,
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Nerang Tiles
11/4/2021 08:38:44 am
Del
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Sarah
1/25/2023 10:19:18 am
Hi. I have new porcelain tiles on an outside deck. Unfortunately they have become deeply stained by the soil and water run off from installed planer boxes. Is there anyway to remove these stains without harming the tile? Thanks.
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Nerang TIles
1/25/2023 10:20:42 am
Sarah
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Julie
2/6/2023 10:33:35 am
Hi Nerang Tiles, I am replacing my kitchen & after pulling out an island bench the porcelain tiles under it were a much lighter shade & one also had a hole in it for power supply from under the floor. As I had four full boxes of tiles left by previous owner I decided to remove & replace 4 600x600 polished porcelain tiles. To my horror once the tiles were removed I discovered the 4 spare boxes of tiles are unglazed & also a lighter shade. I have searched tile shops, demo yards & even the tip shop to try & match but to no avail. How can these unglazed tiles be made to look very similar to the glazed tiles. Would a wet look sealer be appropriate. Thank you for any advice.
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Nerang Tiles
2/6/2023 10:36:46 am
Julie
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5/23/2023 04:05:50 pm
Very interesting content. If you are looking more such content then please visit https://titanceramics.in/.
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Michelle
6/26/2023 09:53:13 am
I just recently had my bathroom remodeled. I have 12x24 matte porcelain very light grey/white tiles in my shower. I’m getting mixed information online. Some links say to seal others say no need. I know I have to seal the grout. Do I need or should I seal the matte porcelain tiles? If so what is best to use and should I avoid getting it on the grout?
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Nerang Tiles
6/26/2023 09:58:51 am
This will depend on the type of tile that you have. Porcelain does not require sealing but you can opt to improve its surface with a nano sealer for unglazed tiles.
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