For two reasons, I give 5 stars.
The first is that the job with the chemical plugs was done as it should be on a brick wall for the installation of a fairly large load. It requires a bit of attention and some preparation, but it is a relatively simple process, of moderate difficulty for a novice and amateur.
The second reason is that the forgotten half-empty cartridge, after 5 years, contains material in excellent condition and can be used as long as there is a new mixing nozzle.

This is the first time I used chemical varnish and it impressed me!! I am already satisfied with the company and other products I use

Unbelievable material, we used it to reinforce our armored door and it became one with the cement. I can say it's even stronger than cement because it's a chemical resin epoxy plug

Excellent. I closed a hole in cement that was larger in diameter than the anchor (metal dowel). I applied it and immediately after I inserted the anchor. In 1 minute, everything was ready. Be careful, as it solidifies very quickly. You must be ready to use it as soon as you press the trigger.

Excellent and the product completely solves the problem of weak holes when you want to support something heavy. I had a problem with some curtain rods in a children's room where the kids were playing with the curtains, accidentally pulling them down, causing their holes to break, with the risk of them coming off and hitting someone. Now there is no such danger.
If I were to make a negative comment, perhaps it would be that the spiral nozzle becomes useless after use, and if you don't use the entire product at that moment, you will need a second one. Fortunately, the eshop where I bought it was kind enough to include an extra nozzle for future use.