3 = Suitable for general applications
3* = Generally suitable but some testing should be done prior to use
NR = Not Recommended
PLEASE NOTE: This Chemical Resistance Guide is a GUIDE ONLY to the general chemical resistance of RustSeal and cannot be used as a bible for all applications and conditions without prior testing. We used KBS RustSeal Oxide Red in most of the tests but Silver and Black were also used at not less than 150um film thickness. Average temperature when applied was 68 degrees Fahrenheit. Common variables to be aware of include temperature; direction of the heat; any localized heating (hot spots); chemical concentration levels; different preparation techniques; chemical layering; different manufacturers specifications for the "same product"; differing substrates and varying film thickness of applied RustSeal.