XTC Primer is 100% UV stable and can be left as a finish coat on its own. You do not have to apply a topcoat of XTC color over XTC Primer. It looks great brushed or sprayed, and plenty of customers choose to stop right there for a clean, matte grey factory-style finish. This guide covers when leaving XTC Primer bare makes sense, and when a topcoat of XTC color is the better call.
Can I Leave XTC Primer as the Finish Coat?
Yes. XTC Primer is a silicone zinc-rich, high-temperature coating rated to 1200°F, and it is fully UV stable on its own, so it will not chalk or fade if left uncoated outdoors. Many customers leave XTC Primer as the finish coat on exhaust headers, furnace exteriors, and other high-heat metal parts specifically for its matte grey appearance. Applying 1 to 2 thin coats of XTC Primer and following the standard temperature cure is all that is required. Review the XTC Directions for full application and cure steps.
When to Topcoat With XTC Color Instead
Choose to topcoat with XTC color when you want a specific finish color other than matte grey. XTC is available in 12 colors, including Jet Black, Cast Iron Grey, Rocket Red, Flame Blue, Pontiac Metallic Blue, and several others, plus a Clear option. XTC Primer is not required for adhesion; XTC bonds well to a properly prepped surface on its own. Use XTC Primer under a color coat when rust protection or extra color coverage on a rough surface is a priority.
Frequently Asked Questions
Do I have to topcoat XTC Primer with XTC color?
No. XTC Primer is 100% UV stable and can be left as the finish coat if you like its matte grey appearance. A topcoat of XTC color is optional, not required for durability or rust protection.
What does XTC Primer look like on its own?
XTC Primer is a matte grey, silicone zinc-rich coating. Many customers leave it as-is for a factory-look matte grey finish on headers, furnace exteriors, and other high-heat parts.
When should I topcoat XTC Primer with XTC color instead of leaving it bare?
Topcoat with XTC color when you want a specific finish color other than matte grey, such as Jet Black, Rocket Red, or one of the other 11 XTC colors. XTC Primer alone is a great option when the matte grey look is what you want, or when maximum rust protection with a simple factory-style finish is the priority.
Conclusion
XTC Primer's UV stability means the choice to topcoat it is entirely about the look you want, not durability. Leave it bare for a matte grey finish, or add a coat of XTC color for one of 11 additional colors plus Clear. Either way, follow the standard application and cure directions for a lasting finish.
