June 11, 2026 | By: Stephen Childs When it comes to roofing systems, the strength of the bonds between adhesives, waterproofing membranes, and substrates is critical. A failure in these bonds can compromise the roof’s integrity, leading to costly repairs or replacements. The TDP-1 Standard was developed to address this need by providing a consistent and reliable method for evaluating bond strength through the “tear drop” peel test.