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Single and Multiple Surface Treatments - International Road Federation 1985 - Video VH-152 - Visit the International Road Federation at www.irfnews.org/ - Noncommercial Use Only - Published with Permission - Single and multiple surface treatments are used to repair road surface defects and upgrade both unpaved and paved roads. This tape defines these treatments and outlines the materials needed. The application process is demonstrated step-by-step on a rural road: placing traffic control devices, cleaning the surface area, applying asphalt, spreading aggregate, compacting the aggregate, placing additional layers for multiple surface treatments, and sweeping off loose aggregate.