The cheapest "sealing" would be water glass. But it is finished after a few years due to vehicle stress.
The screed must be silicified.
Floor paint only 2k in the garage. Better epoxy. But that is also more expensive.
So what now? How now?
I had already suggested the use of potassium water glass here in this forum at an earlier time as a possibility.
That
is a silicification of the screed surface!
Nothing lasts forever in life, that should be known to everyone. But that is not the point, especially not when saving is also playing on one’s mind. The durability of a surface protection is always related to the costs.
For understanding: What was produced (and sold) cheaply cannot possibly have the same material properties as a higher-priced product.
Epoxy resin coatings also do not last forever. It is obviously not mentioned here that the necessary mechanical pretreatment of the substrate as well as pore sealing must be done.
Anyone who wants to build cheaply cannot expect a high-quality execution.
For a garage floor, and that is the only point here, a temporary solution is sufficient. It may also be inexpensive. With the knowledge that it cannot last forever due to mechanical stress.
And with screeds, this topic has also been addressed here, it should perhaps be noted in passing that driving a vehicle on it requires a higher inherent strength of the screed structure than in the residential area.
Cost-wise, however, this is irrelevant, since the screed thickness in a bonded construction must only be 25 mm anyway. The higher quality cement portion does not weigh in on costs.
Regarding the indications "cheaper here" - "cheaper there" - "rip-off" a small note should also be taken into account:
If I— for example, as a screed installer—offer a 120 m² area, I can offer the price differently due to the fixed and overhead costs of my business than for a perhaps 25 m² garage with only 25 mm installation thickness. Because the machinery technology as well as hoses do not clean themselves.
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So if prices are roughly compared, accompanying framework aspects should also be considered.
A screed with insufficient inherent strength will have to be removed and newly installed again after a relatively short service period.
At the expense of the builder, of course!
And if those 100,-- € on a surface protection— in a garage, mind you—are also saved, well, then it will become really expensive for the builder due to the already preprogrammed damages.
But the decision for a concept as well as for the materials used always remains with the responsible person!
Wishing a happy decision: KlaRa