Grout is used at the last stage of repair and construction work. The grout is not covered with any other materials, so its quality must be high, as well as its technical characteristics must meet operational characteristics. It depends on the grout whether the decorative coating will look beautiful as a whole, as well as whether it will be durable and durable, since this material is responsible 
for the integrity of the facing coating and ensures its beautiful appearance. Therefore, if the grout darkens, turns yellow, is covered with spots, fungus or other unicellular animals – the general appearance of the decorative coating will be spoiled and unpleasant when used. Therefore, it is necessary to initially choose a suitable high-quality grout material, which we will tell you about in our article.
What features should a high-quality grout material have?
High-quality grout material should have the following characteristics:
- High adhesion;
- Elasticity;
- Water resistance;
- High strength;
- Crack resistance;
- Resistance to various chemicals;
- Resistance to temperature changes.
This list may be supplemented by other special characteristics of the grout material, which it must possess when used on surfaces with special operating conditions.
Which grout does not darken?
There are several types of grout, among which there are those that do not darken.
It depends on the composition of the material. For example, cement grout is very popular, not expensive and convenient to work with, but, at the same time, they are not durable. Over time, a fungus, stains may appear on the cement grout, and it may also turn yellow and begin to crumble or cover with small cracks. But polymer-cement or epoxy grouts are more wear-resistant and durable. Such grout is resistant to the influence of moisture, and to the formation of various animals, bacteria, etc. Also, due to the fact that such grout is elastic, they are not afraid of temperature changes, do not crack and do not crumble.
Therefore, when choosing a non-darkening grout, purchase a material that contains polyurethanes.
