---
product_id: 75270449
title: "PRO-999 Rx-35 Sealer/Primer for Porous Surfaces"
brand: "roman"
price: "¥22447"
currency: JPY
in_stock: null
reviews_count: 8
category: "Roman"
url: https://www.desertcart.jp/products/75270449-pro-999-rx-35-sealer-primer-for-porous-surfaces
store_origin: JP
region: Japan
---

# 3-hour dry time Water-based & low odor 450 sq ft coverage PRO-999 Rx-35 Sealer/Primer for Porous Surfaces

**Brand:** roman
**Price:** ¥22447
**Availability:** ❌ Out of Stock

## Summary

> 🖼️ Transform your walls with pro-grade ease and flawless finish!

## Quick Answers

- **What is this?** PRO-999 Rx-35 Sealer/Primer for Porous Surfaces by roman
- **How much does it cost?** ¥22447 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/75270449-pro-999-rx-35-sealer-primer-for-porous-surfaces)

## Best For

- roman enthusiasts

## Why This Product

- Trusted roman brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Premium Coverage:** Covers up to 450 sq ft per gallon with durable, mildew-resistant matte finish
- • **Fast-Track Drying:** Ready to hang wallcoverings in just 3 hours—get your project moving
- • **Clean & Comfortable:** Low odor, no splatter formula perfect for any skill level and indoor use
- • **Effortless Wall Prep:** Seals torn drywall & textured surfaces for flawless wallpaper adhesion
- • **Trusted Industry Leader:** Roman’s #1 rated primer by pros with 75+ years of innovation and quality

## Overview

Roman PRO-999 Rx-35 is a water-based, clear matte wallpaper primer and sealer designed for drywall, textured surfaces, and popcorn ceilings. It offers up to 450 sq ft coverage per gallon, dries tacky in 3 hours for superior wallpaper adhesion, and features a low odor, no splatter formula ideal for DIY and professional use. Mildew resistant and non-toxic, it’s backed by Roman’s 75+ years of trusted quality and a 1-year limited warranty.

## Description

ROMAN PRO-999 Rx-35 Problem Solving Primer seals torn drywall to create a wall surface that can be floated, spackled, painted or hung with wallpaper. Great for DIY projects. Use as a primer over skim coats, spackling and/or mud joints. This is the perfect primer for sealing drywall, contractor’s flat paint and old wallpaper waste residue. Works on typically problematic surfaces like textured walls and popcorn ceilings. Dries with slight residual tack, enhancing adhesion of wallpaper. Water based with low odor and no splatter that dries with a clear-matte, tacky finish after 3 hours. Avoid freezing; store upright in a cool, dry place. Each order includes 1-gallon of PRO-999 that covers approximately 400 square feet depending on application and comes with a 1-year limited warranty. Providing quality products for over 75 years, ROMAN's brands are rated number one by professional wallpaper installers. Known as the leader in the industry, ROMAN was the first to introduce pre-mixed wallcovering adhesives, wallcovering primers, and many other innovative products in the wallcovering industry that is a standard on store shelves today.

Review: So easy for a first-time user - I’ve always been intimidated to hang real wallpaper and have stuck to “peel and stick”, but using this was about a thousand times easier than peel and stick. It was forgiving to move the paper around, held well once dried and we are a few months in with no bubbles and no issues.
Review: Works - Great product my bathroom ceiling use to peel paint really bad put this on. It haven’t had any pilling since.

## Features

- IDEAL DRYWALL PRIMER - ROMAN Clear Primer is excellent for priming over torn or bare drywall and most other porous surfaces. Ready to hang wallcoverings after approximately 3 hours dry time.
- SEALS AND PRIMES - PRO-999 Wallpaper Sealer and Primer dries tacky and works for joint compound, spackling, and skim coats. This clear primer is ideal for popcorn ceilings and textured surfaces.
- EASY TO USE - No matter what your project or skill level is, ROMAN Wallpaper Primer will yield superior performance. The low odor, no splatter, and easy clean up with water formula makes it perfect for anyone to use.
- DURABLE - PRO-999 Sealer/Primer is specifically formulated to dry with a clear matte finish and slight residual tack. It offers approximately 400-450 square feet of durable coverage per gallon.
- PREMIUM QUALITY - ROMAN Products has a long-standing successful record in personal and commercial construction projects. Our premium non-toxic wallpaper primer works on most surfaces and is easy to apply, protects the wall surface, and prevents splatter and odor.
- Covers approximately 450 square feet per gallon
- Dry Time: Minimum dry time is 3 hours. Optimum dry time is 12 hours. Low temperature, high humidity and poor ventilation will slow down the drying process.
- VOC: < 25 grams/liter
- Made in USA

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B005MUEQGW |
| Age Range Description | Adult |
| Best Sellers Rank | #57,773 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #43 in Primer Paint |
| Brand | Roman |
| Brand Name | Roman |
| Color | Clear |
| Color Code | Clear |
| Container Type | Pail |
| Coverage | Approx. 350-450 square feet per gallon, depending on the porosity and texture of the surface |
| Customer Reviews | 4.4 out of 5 stars 254 Reviews |
| Finish Type | Matte |
| Full Cure Time | 3 Hours |
| Global Trade Identification Number | 00017104169014 |
| Indoor Outdoor Usage | Indoor |
| Is Waterproof | False |
| Item Form | Liquid |
| Item Height | 7.5 inches |
| Item Type Name | Rx-35 Problem Solving Primer |
| Item Volume | 1 Gallons |
| Manufacturer | Roman Decorating Products |
| Model Name | PRO-999 |
| Paint Type | Acrylic |
| Size | 128 Fl Oz (Pack of 1) |
| Special Feature | Mildew Resistant, Non Toxic |
| Special Features | Mildew Resistant, Non Toxic |
| Specific Uses For Product | Interior |
| Surface Recommendation | Drywall, Plaster, Skim Coat, Joint Compound |
| UPC | 017104169014 |
| Unit Count | 128.0 Fluid Ounces |
| Warranty Description | 1 Year Limited Warranty |
| Water Resistance Level | Water Resistant |

## Product Details

- **Brand:** Roman
- **Color:** Clear
- **Finish Type:** Matte
- **Size:** 128 Fl Oz (Pack of 1)
- **Item Volume:** 1 Gallons
- **Special Feature:** Mildew Resistant, Non Toxic
- **Unit Count:** 128.0 Fluid Ounces
- **Paint Type:** Acrylic
- **Specific Uses For Product:** Interior
- **Surface Recommendation:** Drywall, Plaster, Skim Coat, Joint Compound

## Images

![PRO-999 Rx-35 Sealer/Primer for Porous Surfaces - Image 1](https://m.media-amazon.com/images/I/81vLosRhHoL.jpg)

## Questions & Answers

**Q: How long to set before I can wallpaper over it?**
A: 30-45 minutes until it dries and becomes tacky.

**Q: Can I use acrylic paint on top of Roman 999?**
A: yes

**Q: What is the dry time?**
A: To get the desired result ie. protect the surface and get increased slip and slide, let it dry overnight.  However, in a pinch, putting box fans on the area will generally expedite drying time (3+ hours)and still allow the sealer do what it does so well

**Q: Will this work for 60 grit sanded down old formica dinner table that will be top coated with Behr paint and primer and then stonecoat epoxied?**
A: Hi Jim, PRO-999 Rx-35 is formulated to seal porous surfaces like drywall and joint compound. As Formica is a non-porous, sealed surface, PRO-999 may not be the best primer option for this project.

## Customer Reviews

### ⭐⭐⭐⭐⭐ So easy for a first-time user
*by A***. on November 11, 2025*

I’ve always been intimidated to hang real wallpaper and have stuck to “peel and stick”, but using this was about a thousand times easier than peel and stick. It was forgiving to move the paper around, held well once dried and we are a few months in with no bubbles and no issues.

### ⭐⭐⭐⭐⭐ Works
*by R***R on September 6, 2025*

Great product my bathroom ceiling use to peel paint really bad put this on. It haven’t had any pilling since.

### ⭐⭐⭐⭐⭐ THE first step when installing wallpaper
*by R***N on August 30, 2025*

A must-have prior to installing wallpaper. Water-based so clean-up is easy and RX-35 ensures great adhesion and protects the surface years later when it's time for a change and you need to remove the existing wallpaper.

## Frequently Bought Together

- Roman PRO-999 Rx-35 Wallpaper Primer and Sealer - Bonding Primer for Wallcoverings and Home Improvement, Clear, Water-based - 1 Gallon (400 Sq. Ft.)
- Roman PRO-880 Wallpaper Adhesive & Paste for Any Wallcovering - Ultra Clear Strippable, 1 Gallon(330 sq. ft)
- WRAPXPERT Wallpaper Smoothing Tools,Wallpaper Tool Kit with Squeegee Smoother,Seam Roller,Wallpaper Brush for Wallpaper Hanging,Contact Paper,Vinyl Application,Wallpaper Paste

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-01-23*