There are generally two types of products on the market to protect your masonry surfaces. Understanding the differences is very important. Film forming sealers and penetrating repellents have many differences you should be aware of before sealing any surface. Whether you are water sealing brick, block, concrete, stone or slate, choosing the right product is the key to success.
The majority of “sealers” sold at big box home improvement stores are, what are referred to as, film forming sealers. These film forming masonry waterproofing products are generally silicone based products. When applied to masonry, these sealers form a film, completely closing the pores on the surface. While these sealers generally cost less, they also have a much shorter life once applied. Depending on the environment, these sealers generally offer protection for as little as 1 year. [...]