Materials
Traffic Paint Options for Ontario Parking Lots
Most Ontario parking lots are painted with waterborne acrylic traffic paint, because federal rules require it for half the year. Solvent paint, thermoplastic and glass beads each have a place, and the right mix depends on the season and how hard each marking is driven over.
The table compares the four options we use most, followed by when we pick each one.
Waterborne Acrylic Traffic Paint
Waterborne acrylic is our standard paint, for example Sherwin-Williams SetFast waterborne traffic marking paint. Canada caps traffic marking coatings at 150 g/L of VOCs from May 1 to October 15, and waterborne paint is how a contractor meets that limit.
It dries to the touch in 10 to 15 minutes on a summer day. Its weak point is thin film, so we spray it at 15 mils wet.
Solvent-Based Alkyd Traffic Paint
Outside the summer window, the federal limit rises to 450 g/L, which allows solvent-based alkyd and chlorinated rubber traffic paints. They bite into cool asphalt better in April and late October, when waterborne paint is slow to cure.
The guide to traffic paint types and Canada's VOC rules explains the dates and labelling in full.
Thermoplastic and Durable Markings
Preformed thermoplastic is a hard plastic marking that we heat onto the asphalt with a propane torch. It lasts 3 to 6 years against 1 to 2 for paint, which makes it the better buy for crosswalks, stop bars and drive-thru arrows that every car crosses.
Reflective Glass Beads
Type 1 glass beads dropped into wet paint reflect headlights back to the driver, so lines stay visible at night and in rain. We add them on request, usually at entrances, fire routes and poorly lit back lots.