UPI Dexcelent® & Dexcelent II® Deck Waterproofing Systems

Durable, Code-Compliant Protection for Balconies, Walkways & Stairs

Reliable Waterproofing That Lasts

When it comes to protecting your decks, balconies, and walkways, not all waterproofing systems are built the same. That’s why at Thome Waterproofing, we trust and install UPI Dexcelent® and Dexcelent II® systems — industry-leading, ICC-approved waterproofing solutions engineered for long-lasting durability, safety, and peace of mind.

Whether you’re constructing new, repairing damage, or upgrading an existing surface, these proven systems provide exceptional protection and performance for years to come.

What Is the UPI Dexcelent® System?

The UPI Dexcelent® System is a fiberglass-reinforced waterproofing solution designed for plywood decks, balconies, stairs, and other walking surfaces. Known for its strength, flexibility, and reliability, this system creates a seamless, watertight barrier that:

• Protects against water intrusion, leaks, and dry rot
• Strong fiberglass reinforcement for high-traffic and heavy-use areas
• Provides a non-slip walking surface for added safety
• Can be finished with decorative textures and colors
• Meets strict building code requirements

What Is the UPI Dexcelent II® System?

Building on the success of the original, the Dexcelent II® System offers enhanced strength, protection, and design versatility — ideal for both residential and commercial projects.

It features:

• Added wire lath reinforced, polymer modified cement compound. 
• Same fiberglass reinforcement for high-traffic and heavy-use areas
• Improved slip resistance for stairs, balconies, and walkways
  
• Customizable finishes for a clean, modern look
• ICC-approved performance for multi-family and commercial properties

Why Choose a Dexcelent® Waterproofing System?

• ICC-approved and code-compliant
• Class A, one hour fire rating 
• Exceptional protection against leaks, rot, and structural damage
• Ideal for apartments, condos, and HOAs
• Built to handle high-traffic and outdoor exposure
• Low-maintenance and long-lasting

Fire-Rated Deck Coating Systems

Each system forms a seamless, non-slip surface that resists UV rays, moisture, and heavy foot traffic—ideal for both residential and commercial applications.

Features:

• One-Hour Fire Resistance (ASTM E119 / UL 263)
• Class A Flame Spread Rating (ASTM E84)
• Waterproof, Non-Slip Finish
• ICC-ESR and IAPMO Certified

Get a Free Waterproofing Estimate

Upgrade your property with the industry’s leading waterproofing systems. Whether you need the classic Dexcelent® or the advanced Dexcelent II®, we’ll install it right the first time.

Why Choose Thome Waterproofing?

At Thome Waterproofing, we’re not just installers — we’re specialists in exterior waterproofing systems with years of proven experience in Southern California.

Our team provides complete service from inspection to installation and maintenance, ensuring your property remains safe, compliant, and beautiful.

We offer:

• Certified installation of UPI waterproofing systems
• Expert deck inspections, repairs, and restoration
• Experience with SB 326 & SB 721 compliance
• Full-service project management — from prep to final coat
• Serving Los Angeles & Ventura County