TOPCOAT-PU 720 is a one-component, pigmented, aliphatic, polyurethane topcoat, used for the protection of exposed polyurethane waterproofing coating, especially if a dark final color has been chosen. Forms a UV-stable, waterproof membrane offering the following advantages:

• simple application (one-component product), 
• color stability
• a glossy and easy-to-clean surface, resistant to light pedestrian traffic,
• elasticity,
• resistance to frost,
• maintenance of its mechanical properties over a temperature span of -40 oC to +90 oC.

Certified according to EN 1504-2 and classified as a coating for surface protection of concrete. 
Certificate No.: 2032-CPR-10.11. 
Also certified according to EN 13813 and classified as a synthetic resin screed. CE marked.

TOPCOAT-PU 720 is used for the protection of polyurethane waterproofing coating from:

• UV exposure, especially when a dark color has been chosen,
• pedestrian and light vehicular traffic (e.g. parking decks).

Furthermore, it can be used for protection of metal and concrete surfaces.

Substrate preparation
The substrate must be completely dry, clean, free of grease, loose particles, dust, etc. Existing polyurethane waterproofing coatings do not require priming.

1.1 Metal surfaces
Metal surfaces should be:

• Dry and clean.
• Free of grease, loose particles, dust, etc. that might impair adhesion.
• Free of rust or corrosion that might impair adhesion.

Having been prepared  by brushing, rubbing, sandblasting, etc. and then thoroughly cleaned from dust, metal surfaces are primed with the anticorrosive epoxy coating EPOXYCOAT-AC in one or two layers. EPOXYCOAT-AC is applied by roller, brush or spray. The second layer follows after the first has dried but within 24 hours. 
Consumption: 150-200 g/m2/layer.
Application of TOPCOAT-PU 720 should follow within the next 24-48 hours.

1.2. Concrete surfaces
Concrete surfaces must be treated with the polyurethane primer PRIMER-PU 100 in one coat, with a consumption of approx.. 200 g/m2.

Application
Before application, it is recommended to slightly stir TOPCOAT-PU 720 until it becomes homogeneous. Excessive stirring should be avoided to prevent air entrapment. TOPCOAT-PU 720 is applied by brush, roller or spray in one or two layers, 2-3 hours after priming and while PRIMER-PU 100 is still tacky. The second layer should be applied crosswise after 4-24 hours, depending on the weather conditions. 
Consumption: 0,12-0,25 kg/m2/layer, depending on the substrate.