The coverage of urethane asphalt paint can vary depending on the specific product and the thickness of the layer you intend to apply. Typically, for urethane asphalt paint, coverage is estimated in square feet per gallon rather than a specific thickness.

However, a common estimate for coverage is around 200-300 square feet per gallon for a single coat. To determine the quantity you would need for a 1-liter application, you would need to convert the liters to gallons and then calculate the coverage based on the square footage you intend to cover.

If you have specific square footage or thickness requirements, a reputable manufacturer of urethane asphalt paint should be able to provide more precise guidance based on the product you plan to use.

To calculate the quantity of urethane asphalt paint required for 1 square meter, you'll need to consider the coverage provided by the paint. As mentioned earlier, the coverage for this type of paint is typically measured in square feet per gallon.

If we assume a coverage of 200-300 feet per gallon, we can convert this to square meters for your specific requirement.

1 gallon is approximately equal to 3.78541 liters.

So for a coverage of 200-300 square feet per gallon, the coverage in square meters per liter would be approximately 21.5-32.5 square meters per literTherefore, for a 1-square meter area, you would need approximately 0.031-0046 liters of urethane asphalt paint, on the specific coverage of the product you choose.