Discoloration of road markings directly reduces visibility and nighttime reflectivity, becoming a key issue affecting project acceptance and long-term use.
Common causes vary among different paint types. For solvent-based road marking paint, overheating during heating or prolonged storage can accelerate pigment degradation and resin aging. Water-based road marking paint is sensitive to humidity and low-temperature application, which may cause uneven drying and lead to fading or yellowing. In two-component road marking paint, incorrect hardener ratios or insufficient mixing often trigger chemical side reactions that result in graying or color shifts. Additionally, asphalt bleeding, contact with chemicals like antifreeze, and excessive film thickness affect all types, causing further deterioration.
Effective prevention measures should be tailored to the specific paint system:
For solvent-based road marking paint, use asphalt-compatible thinners to prevent bleeding contamination, avoid expired stock, and strictly follow heating temperature limits.
For water-based road marking paint, control application during periods of suitable humidity and temperature, stir thoroughly before use, and avoid over-application to maintain uniform film curing.
For two-component road marking paint, add hardener precisely per manufacturer specifications and ensure thorough mixing before application.
Across all types, standardize material management, construction processes, and environmental controls to preserve long-lasting performance.
By adopting these targeted measures, you can effectively prevent discoloration and keep road markings clear, reflective, and durable.
