Masterseal 1500 is a polyurethane-based system designed for waterproofing and providing a durable, traffic-bearing surface. The system comprises Masterseal M 205 Low VOC as a base coat and Masterseal TC 235 Low VOC as a top coat. It is suitable for various applications, ranging from light pedestrian traffic to heavy vehicular loads, depending on the application method and material coverage rates. Proper installation requires specific tools and adherence to curing times to ensure optimal performance.
System Components and Applications
The Masterseal 1500 system consists of two primary components: Masterseal M 205 Low VOC, used as the base coat, and Masterseal TC 235 Low VOC, functioning as the top coat. The system is designed to withstand different levels of traffic, categorized as light/medium duty and extra heavy duty.
Light/medium duty applications include parking stalls, balconies, plazas, and stadium applications. Extra heavy duty applications encompass turn lanes and exit/exit ramps. The appropriate application method and material coverage rate determine the system’s capacity to handle the anticipated traffic load.
Required Tools and Accessories
Successful application of Masterseal 1500 necessitates the use of specific tools and accessories. These include a mixing drill, a Jiffy mixing paddle, roller cages with roller covers, spiked sandals, gloves and eye protection, and a squeegee. These tools are essential for proper mixing, application, and safety during the installation process.
Application Procedures: Light/Medium Duty Traffic
For light/medium duty applications, the process begins with applying one coat of Masterseal M 205 at a rate of 25 wet mils. This base coat requires a 24-hour drying period before the subsequent coat can be applied. Following the drying period, one coat of Masterseal TC 235 is applied at 25 wet mils. Aggregate is then incorporated into the top coat while it remains wet, and immediately back-rolled to ensure complete integration. The aggregate should be spread at a rate of 10-15 pounds per 100 square feet in the intermediate coat.
Application Procedures: Extra Heavy Duty Traffic
The installation process for extra heavy duty applications mirrors that of light/medium duty applications, with a key difference in material coverage. For extra heavy duty areas, the material is applied at a coverage rate of 50 square feet per gallon. This increased coverage provides enhanced durability and resistance to heavier loads.
Application Procedures: Pedestrian Traffic Systems
Installation for pedestrian traffic systems begins with priming the concrete substrate, if required. A 25 wet mil coat of Masterseal M 200 is then applied using a notched squeegee at a rate of 55 square feet per gallon (1.35–1.47 m2/L). Immediate backrolling is necessary to level the base coat, and it must be allowed to cure overnight. The next step involves applying a 25 wet mil coat of Masterseal TC 225 using a notched squeegee at 55–60 ft2 /gal (1.35–1.47 m2 /L), followed by immediate backrolling to level the material.
Incorporating Aggregate for Pedestrian Systems
The documentation details a backroll method for incorporating aggregate into pedestrian traffic systems. After mixing the top coat, half of the mixed material is transferred to a second pail. 20 pounds of Masterseal 945 aggregate is added to this half (assuming 2.5 gallons of TC 225). If using short-filled Masterseal TC 225 Tint Base material, 20lbs of Masterseal 945 is added directly to the pail after pre-mixing pigment packs. The mixture requires an additional 3 minutes of mixing for uniform consistency. The topcoat is then applied at 20 wet mils (or 80 sf/gallon) using a 1/8″ notch squeegee, ensuring full saturation of the roller.
Curing Time and Clean Up
Allowing sufficient curing time is crucial for the longevity and performance of the Masterseal 1500 system. A curing time of 72 hours is required before vehicular use is permitted. This period should be extended in cooler weather conditions. To expedite the curing process and reduce vulnerability to inclement weather, or to shorten the time between coats, the use of MastesSeal 914 is recommended.
Clean up of tools and equipment should be performed immediately after use with xylene. Cured material requires mechanical removal.
Post-Application Considerations
After the system has been fully applied, a curing period of 48-72 hours is required before the area can be opened to traffic. This allows the polyurethane coating to fully harden and develop its protective properties.
Safety Precautions
The application of Masterseal 1500 requires adherence to safety guidelines. Users must wear gloves and eye protection throughout the process. Proper ventilation should be ensured when using xylene for cleanup.
Conclusion
Masterseal 1500 provides a robust polyurethane traffic coating solution for a range of applications. Successful installation relies on careful adherence to the specified procedures, including proper tool usage, material coverage rates, and curing times. The system’s ability to withstand varying traffic loads, from pedestrian to heavy vehicular, makes it a versatile option for protecting and waterproofing surfaces.