In the roofing industry, application methods are limited for applying rapid-cure materials. To start, rapid-curing sealing membranes are delivered in 200-liter drums. This container volume is often too large for most touch-up and small project applications. In addition, the setup time for the standard rapid-cure material application method – plural-component spray system (hot spray) – is both time consuming and cost prohibitive for smaller projects. Due to high equipment costs and high levels of coating waste, rapid-cure coatings are often not used by applicators. To combat these challenges, roofing companies use polyurethane (PU) coating systems for small and touch-up applications. However, there are issues with using PU coating systems as well.
40 liters is the standard kit size for a PU coating system. Smaller kits for touch-up are often not available. Also, the mixing and metering of the coatings used in a PU coating system are performed at the construction site, which brings a high risk of failure. Since most PU coatings cure in 5-30 seconds, PU touch-up applications usually require the use of a plural-component spray system, which as was mentioned above, features a long setup time and can be expensive.