The Protal 7125 Repair Cartridge can be applied from -4°F to 135°F (-20°C to 57°C). For small pinhole repairs: Surfaces of repair up to 1/16 inch (2 mm) in diameter, roughen the surface of the parent coating, to remove gloss, around the holiday for at least 1 inch (25 mm). Use 80 – 120 grit sandpaper or light sweep blasting. Medium sized repairs: Surfaces of repair areas up to 4 in2 (25 cm2 in size, shall be prepared by abrasive blasting, as specifi ed in Section 11, or by power tool cleaning in accordance with SSPC- SP 11 to remove dirt, scale, rust, damaged coating and any other foreign material to a bare metal condition and retain or produce the surface profi le required by Section 4.0. Large repairs: Surfaces of repair areas exceeding 4 in2 (25 cm2 shall be repaired by abrasive blast cleaning as specifi ed in Section 4.0. The adjacent parent coating and any holidays or damaged coating adjacent to the cutback area shall be roughened for at least 1 inch (25 mm) around the repair and the edges shall be feathered. After abrading, all dust shall be removed from the prepared areas using compressed air, a clean, dry bristle brush, a clean dry cloth or removed in accordance with SSPC-SP-1 using acetone, xylene or MEK.
