Can I apply this to a painted smooth masonary wall?

I wouldn't think its an issue. I used it over a textured/painted wall and it worked great.

Works for non-woven wallpaper ??

This wallpaper adhesive did not work as heavy duty to me. It should work on any wallpaper. It goes on pretty wet. The old thing is you can move the paper and realign, if needed probably for a good 30 mins after you place it.

do I have to prime my wall first?

Just a thought, if it is new wallboard and if you think you might ever want to paint that wall it would be better to prime it so that the glue doesn't soak into the wallboard. Then when you take the wallpaper down you won't pull hunks of wallboard out.

Is this a vinyl adhesive

Not sure, I use this for heavier wallpaper and will never use anything but this ever. Its amazing!!!

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ROMAN PRO-838 Heavy Duty Clear Wallpaper Adhesive, for Commercial Weight Wallcoverings, Wall Carpet, Non-Wovens, and More, 1 Gallon (300 sq. ft.)

ROMAN PRO-838 Heavy Duty Clear Wallpaper Adhesive, for Commercial Weight Wallcoverings, Wall Carpet, Non-Wovens, and More, 1 Gallon (300 sq. ft.)

Product ID: 14470648

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Details

Brand
Roman
Specific Uses For Product
Wallpaper
Material
Modified
Compatible Material
Commercial
Item Form
Liquid

🕒Long open time for perfect positioning

🧪Low VOC <5 g/L for safe indoor use

🧴1 Gallon covers 300 sq. ft.

Description

🧱 Stick with the best—RomanPRO-838, where heavy-duty meets hassle-free!

CLEAN CLEAR - Dries completely transparent for a pristine finish, ideal for light or delicate wallcoverings that demand perfection.
MADE IN THE USA - Crafted by Roman, a trusted industry leader with 75+ years of expertise in premium wallcovering adhesives.
PRO GRADE POWER - Heavy-duty adhesive engineered for medium to heavyweight wallcoverings, ensuring a flawless, lasting bond.
ECO SMART FORMULA - Low odor and VOC compliant, creating a healthier workspace without compromising performance.
EFFORTLESS PRECISION - Strong initial tack with extended open time lets you adjust your wallpaper perfectly—no stress, just style.

RomanPRO-838 is a professional-grade, heavy-duty clear wallpaper adhesive designed for medium to heavyweight wallcoverings including vinyl, fabric-backed, and non-woven types. It offers strong initial tack with ample open time for easy repositioning, dries clear for a clean finish, and features a low VOC, low odor formula safe for indoor use. This 1-gallon adhesive covers up to 300 sq. ft. and is proudly made in the USA by Roman, a leader in wallcovering adhesives for over 75 years.

Specifications

Brand	Roman
Specific Uses For Product	Wallpaper Installation
Material	Modified Starches
Compatible Material	Commercial Weight Wallcoverings, Non-woven Wallpaper, Vinyl Wallpaper
Item Form	Liquid
Color	Clear
Item Package Quantity	1
Package Information	Pail
Item Volume	1 Gallons
Viscosity	29,000
Water Resistance Level	Not Water Resistant
Unit Count	128.0 Fluid Ounces
UPC	017104113017
Number of Pieces	1
Global Trade Identification Number	00017104113017
Manufacturer	Roman Decorating Products
Part Number	11301
Item Weight	1 pounds
Product Dimensions	8 x 8 x 7.5 inches
Item model number	011301
Is Discontinued By Manufacturer	No
Size	1 Gallon
Style	Clear Wallpaper Adhesive
Pattern	Bonding Adhesives
Included Components	Roman 011301 PRO-838 1 gal Heavy Duty Wallpaper Adhesive, Clear
Batteries Included?	No
Batteries Required?	No