1. Scope
1.1 This specification covers a cold applied coal tar coating for use on underground and underwater steel structures.
1.2 INTENDED USE: This coating is suitable for use on structures exposed in Environmental Zones 2A (frequently wet by fresh water), 2B (frequently wet by salt water), 2C (fresh water immersion), 2D (salt water immersion), 3B (chemical exposure neutral), and 3C (chemical exposure alkaline). The coating is also suitable for use on hydraulic structures and pipe. It must be used with discretion for immersion in corrosive chemicals since the coating is dissolved by some organic solvents and attacked by oxidizing
solutions.
1.3 To prevent checking and alligatoring when exposed to sunlight, the coating must be topcoated with coal tar emulsion meeting SSPC-Paint 32.
2. Description
2.1 This coating is a cold applied, black, self-priming, heavy-duty protective coating. It is based on a blend of coal tar pitch, selected solvents, and fillers.
2.2 The coating contains approximately 70% by volume of non-volatile film forming solids. The theoretical
spreading rate for a 15 mil (380 micrometers) dry film thickness is approximately 75 square feet/gallon (1.8 square meters/liter). Actual spreading rates can be significantly lower.
