Hi John,
Thank you for your question. Yes, you can use a Joly on stairs. Here are other options as well. https://kofflersales.com/product/schluter-trep-g-gk https://kofflersales.com/product/schluter-trep-e-stair-edging-profile https://kofflersales.com/product/schluter-trep-stair-edging-profile
Thank you,
The Koffler Team