Bought product to help waterproof exterior wall surfaces of concrete block buildings. Selected the water-based formula for less odors and ease of application equipment (did not require solvent resistant sprayer). Talked with tech department twice to help resolve application issues with 20+ year old CMU building previously treated with solvent based waterproof product 20 years ago. Tech people very helpful. Application on this building appears to have restored the waterproofing I was looking for.
I also applied this product on a newer CMU building and it appears to be working fine. Application on this building was easy.
Cannot comment on longevity as product was recently applied, but "testing" by spraying water on walls shows excellent water repellency. I would use again.