Contractors, commercial, general, masonry, excavation services. Seal-Tite Quality Concrete is a basement waterproofing specialist operating in St. Catharines and the Niagara Region.Offering Free inspections and estimates to homeowners and commercial property owners with leaky basements since 1989. Our happy, dry customers are living proof that our trained professionals gets the job done right with the best quality in waterproofing materials.Searching for a qualified and trustworthy contractor can be challenging, but you'll find that Seal-Tite Quality Concrete cares the most when making sure ...