This guide covers the selection and application (including surface preparation) of topcoats to surfaces coated with zinc-rich primer. Both organic and inorganic zinc-rich primers are included.
The guide does not cover the selection and application of the zinc-rich primer.
This guide represents good practice for topcoating zinc-rich primers as determined by industry consensus. It may not be applicable to all materials and conditions encountered.
Zinc-rich primers are topcoated to provide extended exterior durability in severe exposures; to improve color, gloss, and other appearance properties; and to provide resistance to specific conditions such as highly acidic or highly basic environments.
Information on the use of one-coat zinc-rich painting systems is provided in SSPC Painting System Specification12.01.
