Whether it’s for waterproofing, vapor-proofing, oil contamination remediation, or resurfacing concrete substrates, Koester Waterproofing Systems have the solution. Koester set out to combat the primary cause of flooring failure : moisture vapor. This lead to the development of the industry leading product for combating moisture and alkalinity problems, VAP 1 - 2000 and several other great products. With combined experience of over 100 years, our technical and sales staff continues to offer the best recommendations and products for remediation of the toughest jobs.