Updated June 4, 2025

Strengthen Your Deck Waterproofing with WP Wrap

Build Confidence from the Ground Up

Waterproofing a deck is more than just a box to check—it’s a long-term investment in the safety, performance, and integrity of the building. Even the most reliable systems can be vulnerable at flashing details, seams, and other tricky transition areas. That’s where Westcoat’s WP Wrap comes in.

Designed to work seamlessly with our ALX™ and MACoat™ Waterproofing Systems, WP Wrap adds an extra layer of protection where it’s needed most: around the perimeter of decks, over flashing, and in other sensitive or high-risk zones.

What Is WP Wrap?

WP Wrap is a supplemental waterproofing accessory made of two components working in tandem:

• WP-95 Waterproofing Membrane: A flexible, asphalt-modified latex coating that provides elastomeric protection.
• WP-45 Flashing Fabric: A tough, engineered textile designed to reinforce corners, seams, and vertical-to-horizontal transitions.
• When combined, they create a seamless, flexible, and reinforced membrane that guards against water intrusion—even in high-movement or hard-to-seal areas.

Why Use WP Wrap?

Decks are constantly exposed to the elements, and common areas like flashing, drains, penetrations, and perimeters are frequent failure points. WP Wrap addresses these vulnerabilities by:

• Improving waterproofing integrity in high-risk areas
• Resisting cracking and tearing, even under stress or temperature swings
• Reducing the risk of costly repairs or water damage over time
• Delivering peace of mind for property owners, contractors, and specifiers alike

For architects and consultants, adding WP Wrap to your spec ensures you’re reinforcing the building envelope at every layer. For contractors, it’s a practical, jobsite-ready solution that applies easily and adheres reliably. And for distributors, it’s a smart upsell with high value and minimal storage needs.

Seamless Integration with ALX™ and MACoat™ Systems

WP Wrap is engineered to install cleanly with Westcoat’s ALX™ and MACoat™ waterproofing systems:

• For ALX™, WP Wrap is installed after the Base Coat is applied.
• For MACoat™, it can be installed before or after the Base Coat, depending on the project needs.

From a mechanical standpoint, the process is simple. The WP-95 membrane is applied over the surface, then the WP-45 fabric is embedded into the wet membrane, forming a tight bond that follows contours and corners with ease. A final coat of WP-95 ensures total saturation and strength.

Reinforce for the Real World

Whether you’re retrofitting an aging deck or building new, WP Wrap delivers an added layer of assurance that’s easy to install and built to last. When used correctly, it reduces the risk of water ingress in areas most prone to failure—giving your ALX™ or MACoat™ system an extra line of defense.

For building owners, this means fewer headaches. For property managers, it could mean the difference between a routine inspection and a major repair.

Speaking of inspections, don’t forget to check out our [Deck Inspection Guide landing page] to ensure you’re meeting all maintenance and code compliance standards. For projects in fire-prone regions, visit our [Deck Fire Safety landing page] to learn how to specify fire-rated systems.

Advantages at a Glance

• Seamless and Flexible Material Resists Tearing
• Excellent Adhesion to Common Deck Surfaces
• Maintains Elastomeric Properties at Low Temperatures
• High Tensile Strength
• Reduces Reflective Cracking
• Easy to Install with ALX™ and MACoat™ Systems

Want to learn more?
Stay protected from the ground up. Contact us to find your local rep or request a training on waterproofing best practices with WP Wrap.