Ultimate Linings Advanced Underlayment System
Elevating durability under high-traffic construction tiling.

Our Robust Waterproofing Membrane Is the Perfect Solution for Construction Tiling in High-Traffic Areas
With the ability to accommodate any type of tiling, our system allows areas to be transformed into a tiled space, ready for both pedestrian and vehicle traffic.
The Ultimate Linings Underlayment System

- 1. Concrete substrate: A properly prepared concrete surface forms the foundation of the system.
- 2. UL P616 Epoxy Primer (7 mils): A foundational two-component high build 100% solids epoxy primer that promotes adhesion and eliminates pinholing, preparing your tank for durable protection.
- 3. Castable layer: A flexible castable buildup that levels the surface ahead of the polyurea membrane.
- 4. UL XP-421 Pure Polyurea (60 mils / 1.50mm): A high-performance pure polyurea, ideal for combating the challenges of water storage, including ponding and the pressure of contained water. Its application ensures a waterproof, enduring layer.
- 5. Tiling: Suitable for all tiling types, accommodating both pedestrian and vehicle traffic.
Advantages of the Ultimate Linings Underlayment System
Prevents Water Penetration
Creates a barrier between tile and substrate, stopping water wicking and leakage.
Resists Hydrostatic Pressure
Shields tile and substrate from hydrostatic pressure, preventing cracking and spalling.
Resilient Durability
Ideal for high traffic areas, our system withstands continuous use, maintaining its integrity over time.
Flexible Design
Accommodates structural movement, preventing cracks and ensuring long-term stability.
Chemical and Abrasion Resistance
Withstands harsh chemicals and physical wear, extending the lifespan of your construction.
Enhanced Longevity
Outperforms traditional underlayment in terms of durability and resistance to environmental factors.
Versatile Application
Suitable for a wide range of outdoor and indoor settings, offering greater flexibility in use.
Ease of Maintenance
Simplifies upkeep due to its resistant nature, saving time and resources in the long run.
The Ultimate Lining Promise
- ISO 17025 Certified: Ultimate Linings ensures the highest standard in polyurea fast-set coatings.
- Comprehensive Support: Benefit from our full technical support team and mastery in polyurea applications.
- Reliable Supplier: We provide top-tier materials, equipment and technical training to approved external applicators.

Are You a Contractor?
Underlayment projects can provide an additional revenue stream for established coating contractors, concrete specialists and businesses looking to expand into high-performance protective coatings. Ultimate Linings supports professional contractors with high-performance coating materials backed by decades of experience in plural-component spray technology. Whether you already apply polyurea or are investigating adding underlayment systems to your existing services, talk to our team about the opportunities available.
Work with Ultimate Linings for:
- Professional polyurea underlayment systems
- Technical product guidance
- Underlayment system selection support
- Application knowledge
- Plural-component equipment expertise
- Contractor training and technical support
- Access to a broader range of protective coating technologies
Partner with Ultimate Linings for Superior Waterproofing Solutions
Enhance your service offerings with our advanced underlayment system. Contact us for more information and to discuss your specific needs.
Contact Us