1070. 3(d) 1070. 3(d) cleaning, perform the following in crevices/gaps scheduled for pack rust treatment. In all cases, allow the caulking, penetrating sealer, and paint coats to dry according to manufacturer’s recommendations before proceeding to the next step. Apply production primer application to surrounding steel while trying to avoid the crevice/gap to receive pack rust treatment . Overspray into the crevice/gap with primer is allowed . Do not apply the stripe coat of primer to the crevice/gap . Flood apply the penetra ting sealer into the crevice/gap , so the material flows and wicks in. Remove excess penetrating sealer after flooding. Brush apply a stripe coat of intermediate to the entire crevice/gap area. After stripe and production intermediate coat application, caulk the crevice/gap to fully bridge and seal the area from moisture intrusion. If applied to multi -sided surfaces, apply caulk to the top and sides of crevice/gaps only. Allow a downward facing or bottom crevice/gap to remain uncaulked so moisture that may enter the crevice/gap can escape. Apply finish coat.
PDS including the thickness ranges for each coat and dry times before the application of the next coat or stripe coat . Achieve a surface free of shadow -through, runs, sags, overspray, dry spray, pinholes, skips, misses, and other film discontinuities. Obtain a dense and uniform appearance for each coat. Determine the dry film thickness of each coat according to SSPC -PA2 Coating Thickness Restriction Level 3 , except measure each 100 -square foot increment of the surface. Determine the thickness of each coat by subtracting the thickness of the underlying coats from the cumulative thickness measurements. If the thickness of an individual coat is in question , perform destructive dry film thickness measurements according to ASTM D4138 Procedure A, using a grooved cutting instruments such as a Tooke Ga uge, or equal. Repair damage created by the cutting instrument at no additional cost to the Department. If the thickness of any coat is less than specified, unless otherwise allowed, apply additional coating to achieve the specified thickness before applying the next coat. If the thickness of any coat exceeds the specified maximum, or the surface exhibits runs, sags, dry spray, overspray, pinholes, or other discontinuities, remove the excessive thickness or discontinuity by sanding or abrasive blast cleaning. If the thickness is reduced to below the specified minimum, recoat the area. If the excessive thickness or discontinuity being removed is in the finish coat, apply a thin coat of finish material to achieve a smooth uniform appe