How do I seal brown paper wallpaper?

I would seal it with polycrylic. It is water-based, cleans up with water, and if you do light coats, won't loosen the wallpaper. Polyurethane may yellow over time and is used for places where you need durability, such as floors.

Oh alrighty. Thank you.

Hi Amy,

I'm Linda and I just wanted to tell you that I agree with Beth about using polycrylic rather than poly urethane for exactly the same reasons. Sometimes it's good to why more than one person would use a specific type of product. :) Wishing you the best.

I agree with the previous answers. Water based top coats offer excellent protection and don’t yellow over time. Home Depot has a good one by Varathane. Avoid the glossy finish if you don’t want to see brush marks. good luck!

Thank you, ladies.

Polycrylic is polyurethane just a name for Minwax brand and is water based. Any good water based polyurethane will work. Dries fast, doesn't yellow. Oil based has a yellow tinge and does yellow over time.

Oh. Okay. Thank you, William.