Put generally speaking you don't have to seal it. It will get darker over time whether you seal it or not, but it will be easier to clean and will less likely stain if you do seal it.
Remove and Replace Grout
The most thorough and complete solution is to remove the grout and install new, grout in the color of your choice. In small areas, such as backsplashes and tub or shower surrounds, this project can be less difficult than you might imagine.
It's important to remember that black grout can be very messy and difficult to clean up. Grout is similar to kinetic sand in texture—it's gritty, and it can go everywhere, even with the most experienced professional. And because there's such a contrast between the tile and grout color-wise, any mistake will stand out.
The only type of grout that doesn't need sealer is epoxy, which is inherently pre-sealed. Grout sealers typically come in two forms-- spray-on sealers and applicator sealers. Applicator sealers are applied directly to the grout with a roller ball or a brush.
Whoever installed your floors most likely did not seal the grout because it needs time to harden and cure completely.
The Drawback of Using Grout Sealer
Moisture can still pass through most sealers, meaning grout isn't entirely waterproof even when sealed. Over time, grout in areas like bathrooms will naturally stain or show signs of aging, regardless of sealing.
Unsightly Grout Stains and Discoloration:
One of the most noticeable effects of neglected grout sealing is the gradual accumulation of stains and discoloration. Grout is porous by nature, which means it readily absorbs liquids, dirt, and debris.
Any type of material can be susceptible to cracking if not sealed correctly. This will keep moisture out to keep the grout from deteriorating.
If you notice your tile grout is changing color, specifically getting darker when it's wet, you can be pretty sure the seal is broken and needs to have some grout sealing reapplied by a professional. You may also notice dirt and grime gathering between your tiles that doesn't wipe off when you apply a grout cleaner.
Using Too Much Sealant
You might be tempted to use more grout sealer to get the job done quickly, but an excess amount can easily spill over onto the tiles. As a result, unnecessary time will have to be spent scrubbing the excess sealant off.
This really works! The grouting around the tiles in our kitchen and bathroom was looking very tried with several black damp spots. The grout pen covered it all in one coat and was very simple and quick to use. We added an extra coat on the very stained sections and now it all looks like fresh grouting.
Black grout acts as a bold outline, highlighting each tile's shape and enhancing any layout pattern you choose. Whether you use classic subway tiles, hexagons, or intricate mosaics, black grout defines the layout, making each tile stand out individually.
Ammonia and bleached-based grout cleaning solutions can strip the color from your grout, causing an irregular appearance. Conversely, cleaning agents might settle into the pores of your grout and act like a magnetic force for dirt and grime, causing a dark, dull appearance. It's a common mistake.
Put generally speaking you don't have to seal it. It will get darker over time whether you seal it or not, but it will be easier to clean and will less likely stain if you do seal it.
In short, the color doesn't change after sealing.
Replacing grout is certainly one way to fix the problem. Instead, use UltraCare Grout Refresh, a water-based color seal, available in 40 standard grout colors. It's made for refreshing the look of old, discolored grout, or completely changing the color of the existing grout.
It is never too late to seal existing grout to avoid and prevent future damage. However, it is recommended that sealing should be done as soon as tile installment is finished in order to prevent future costly repairs.
While the tile industry does not require sealing, it is always recommended, especially in wet or high-traffic areas. Penetrating sealers are the most commonly used and offer high water, chemical and stain resistance. They provide protection without changing the appearance of the grout joint.
Check the color and condition in some of the higher-traffic areas of the room. If you notice any chipping or cracking in the grout, it won't respond well to cleaning and will most likely just break apart if you try to clean it with any kind of physical force.
If your grout is a few years old, it's normal that in time, it will crack. This results from a few key causes: Exposure To The Elements.
The long-term use of bleach on grout can lead to several adverse effects. As an oxidizing agent, bleach can weaken the cement binding the grout, reducing its durability. Additionally, it can cause discoloration, leading to an uneven and blotchy appearance.
Once the grout has cured, dried, you can proceed with the sealing process. Keep in mind that grout sealing is not a one-time affair. It is advisable to reseal your grout annually, or immediately after a known acidic spill.
The best answer, in a word, is money. It costs more time and material to seal grout and there is little or no perceived benefit (until, of course, the grout gets stained or starts to crack). A superior product would cost more to purchase and install, again for no perceived benefit over the less costly unsealed grout.
Sealing grout after cleaning will make your grout easier to clean. No one loves an everyday cleaning chore that takes an exorbitant amount of time and effort. This is another reason that The Grout Medic always recommends that you seal grout after cleaning.