Ask HiltiAskLearnArticles
Ask Hilti

Intumescent coating top coat required or optional?

Posted by Kevinalmost 6 years ago
Intumescent coating top coat required or optional?

Is top coat required or optional?

intumescent coating,steel protection

1 Reply
Posted by Ernst Toussaintalmost 6 years ago

Hello Kevin and thank you for utilizing ASK Hilti! To determine if a top coat is required for either interior or exterior, looking at the UL listing is the best place to obtain this information. Our Hilti Fire Finish does not require a top coat for interior environments as we see that as optional, however for exterior surfaces you will need an approved exterior polyurethane top coat found on our UL listing.