---
product_id: 75270449
title: "PRO-999 Rx-35 Sealer/Primer for Porous Surfaces"
brand: "roman"
price: "€ 114.75"
currency: EUR
in_stock: true
reviews_count: 9
category: "Roman"
url: https://www.desertcart.hr/products/75270449-pro-999-rx-35-sealer-primer-for-porous-surfaces
store_origin: HR
region: Croatia
---

# 3 hr quick dry Low VOC & non-toxic 450 sq ft coverage PRO-999 Rx-35 Sealer/Primer for Porous Surfaces

**Brand:** roman
**Price:** € 114.75
**Availability:** ✅ In Stock

## Summary

> 🖼️ Seal it. Prime it. Own your space.

## Quick Answers

- **What is this?** PRO-999 Rx-35 Sealer/Primer for Porous Surfaces by roman
- **How much does it cost?** € 114.75 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/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

- • **Maximize Your Wall Prep:** Covers up to 450 sq ft per gallon for efficient, large-scale projects
- • **Breathe Easy, Work Clean:** Low odor, water-based formula with <25g/L VOC for a healthier indoor environment
- • **Fast-Track Your Renovation:** Dries to a clear matte, tacky finish in just 3 hours—ready for wallpaper or paint
- • **Versatile Surface Solution:** Seals porous drywall, popcorn ceilings, and textured surfaces with mildew resistance
- • **Effortless Application & Cleanup:** No splatter, easy soap-and-water cleanup—perfect for pros and DIYers alike

## Overview

The ROMAN PRO-999 Rx-35 is a premium, water-based sealer and primer designed for porous surfaces like drywall and textured ceilings. Offering up to 450 square feet coverage per gallon, it dries quickly in 3 hours to a clear matte finish with slight tackiness, ensuring superior wallpaper adhesion. Low odor and low VOC make it ideal for indoor use, while its mildew resistance and easy cleanup cater to both professional contractors and DIY enthusiasts. Trusted for over 75 years, ROMAN leads the industry with innovative, high-quality wallcovering primers.

## 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: Very good quality! - Easy to apply sizing and wallpaper adheres to product and stays once dried. After applying the sizing to the wall, let dry about 1-2 hours. It will be tacky after drying, then apply the wallpaper. Easy soap and water cleanup. No smell and covers a lot. I still have 3/4 gallon after papering my bathroom.
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.

## 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 | #59,394 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #58 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 | 4.5 out of 5 stars 265 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 Type Name | Rx-35 Problem Solving Primer |
| Item Volume | 1 Gallons |
| Manufacturer | Roman Decorating Products |
| Model Name | PRO-999 |
| Model Number | 16901 |
| Paint Type | Acrylic |
| Part Number | 16901 |
| 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
- **Item Volume:** 1 Gallons
- **Paint Type:** Acrylic
- **Size:** 128 Fl Oz (Pack of 1)
- **Special Feature:** Mildew Resistant, Non Toxic
- **Specific Uses For Product:** Interior
- **Surface Recommendation:** Drywall, Plaster, Skim Coat, Joint Compound
- **Unit Count:** 3780 Milliliters

## Images

![PRO-999 Rx-35 Sealer/Primer for Porous Surfaces - Image 1](https://m.media-amazon.com/images/I/81vLosRhHoL.jpg)
![PRO-999 Rx-35 Sealer/Primer for Porous Surfaces - Image 2](https://m.media-amazon.com/images/I/71WExJ02MfL.jpg)
![PRO-999 Rx-35 Sealer/Primer for Porous Surfaces - Image 3](https://m.media-amazon.com/images/I/61T0oAazblL.jpg)
![PRO-999 Rx-35 Sealer/Primer for Porous Surfaces - Image 4](https://m.media-amazon.com/images/I/71xcYFTX8lL.jpg)
![PRO-999 Rx-35 Sealer/Primer for Porous Surfaces - Image 5](https://m.media-amazon.com/images/I/61XvuIAx0JL.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

### ⭐⭐⭐⭐⭐ Very good quality!
*by L***E on December 31, 2024*

Easy to apply sizing and wallpaper adheres to product and stays once dried. After applying the sizing to the wall, let dry about 1-2 hours. It will be tacky after drying, then apply the wallpaper. Easy soap and water cleanup. No smell and covers a lot. I still have 3/4 gallon after papering my bathroom.

### ⭐⭐⭐⭐⭐ 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.

## 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

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.hr/products/75270449-pro-999-rx-35-sealer-primer-for-porous-surfaces](https://www.desertcart.hr/products/75270449-pro-999-rx-35-sealer-primer-for-porous-surfaces)

---

*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-06-07*