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SSPC-Paint 33, Coal Tar Mastic, Cold Applied

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Revision Date: April 01, 2006
Updated On: April 01, 2002
Editorial Change: April 1, 2006
 
This specification covers a cold applied coal tar coating for use on underground and underwater steel structures.

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.

To prevent checking and alligatoring when exposed to sunlight, the coating must be topcoated with coal tar emulsion meeting SSPC-Paint 32, Coal Tar Emulsion Coating.

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