Usè "Metal Seal" gives results ???

In previous days I published my problematic about a filtration or fissure in the monoblock of my car. After several days of anguish waiting for my car, it seems that the product "Metal Seal" covered the leak of my engine avoiding a very expensive repair. My question is, how quiet can I be that the product definitively covered the motor to the engine? The macanic tells me that it has previously solved big problems in more damaged engines and that the product does an almost miraculous job. I would thank your opinions to those members of the forum who have had some experience with this product. GREETINGS!!

Look at the product is good, but I do not use it as a definitive repair but rather as a test, if the auto improvement I tell the cleventh that there is a fissure and that we unveil the engine, there are customers who do it immediately and others who return after two years that the problem reappeared, it can last a lot but if the crack creates these in problems, it is to avoid using the hydraulic test. But it can vast time.

The Metal Seald or Seald Blok I use it a lot to fill the slots where the leagues of the shirts in the Caterpillar engines are rude work and it is very reliable if you are in Mexico the brand that in years I have used is devcon it supplies it normally or quick GRASIAS BOTTAGE FOR YOUR ATWENCION IS BOTTLY