SURFACE PREPARATION:
Surfaces should be free of all roof debris and in a water-tight condition.
APPLICATION:
Apply 507 SPC Primer / Wash via a sprayer (Hudson-type agricultural) to the entire roof at an application rate of 500 square feet per gallon (0.20 gal. / 100 sq. ft.). Use a 3-4 foot arc pattern. Allow 507 SPC Primer to stand for 10-15 minutes. Clean EPDM roof with a commercial power washer (between 2000-3500 psi). When cleaning the EPDM, it should be done slowly and close to the surface in order to remove mica and inorganic release agents. Start washing up the roof. Then, back down to completely remove all residues. Care should be taken to not damage the EPDM roof membrane. Use caution when walking on roof surfaces, as they may be extremely slick. *Rinse thoroughly with power washer. The rinse step may be done at a faster pace than the cleaning step. In the final rinse water should be clear with no soap bubbles present. The EPDM membrane will range from muddy brown to black after washing with the 507 SPC Primer / Wash. When the surface is dry, coating may begin. *Due to the rinse water possibly containing dirt, mold, mildew algae and diluted 507 SPC, do not allow rinse to flow into drains or sewers leading to open bodies of water (lakes, ponds, streams, etc.). Do not dispose of the neat 507 SPC product into drains, sewers or open bodies of water. Rinse water from downspouts could stain concrete parking lots and decks as it flows to municipal drains. Because of this, temporary hoses should be used to direct the rinse water.
COVERAGE RATE:
0.20 gallon per 100 sq. ft. (500 sq. ft. per gallon).
