Proteus Pro-Felt® Ultima Plus – Durable, Plastomeric Torch-On Membrane

The Proteus Pro-Felt® Ultima Plus system, BBA certified to deliver a service life in excess of 30 years, is a plastomeric modified bitumen solution, designed to provide long-lasting protection for flat or pitched roofs with limited access. Whether specified as a direct waterproofing overlay or as part of the proven Proteus Waterproofing built-up roof system, Ultima Plus delivers exceptional durability and dimensional stability.

Proven Waterproofing Performance

Suitable for use in warm roof build-ups or as a standalone waterproofing membrane, Proteus Pro-Felt® Ultima Plus offers a robust solution for both new-build and refurbishment projects. Manufactured with distilled bitumen and elasto-plastomeric polymers (APP), the system delivers consistent performance, flexibility and long-term protection.

The system includes the Ultima Plus Mineral Capsheet, a single-strand composite polyester reinforcement, which offers excellent mechanical strength and dimensional stability. When combined with Proteus Pro-Felt® SA Underlay or the Ultima Plus Sanded Underlay, it forms into a reliable, multi-layered waterproofing system.

Specialist Anti-Root Protection

Proteus Pro-Felt® Ultima Plus is also suitable for green roof applications or areas where planting is required, when using the Ultima Plus Anti-Root Capsheet, which provides more targeted protection. Designed with special additives and reinforced non-woven polyester, it resists root penetration and aggressive chemicals such as fertilisers and herbicides, without compromising the life and health of vegetation. The anti-root properties are permanent and are unaffected by weathering, water, or torch-on application.

Key Features & Certifications

Fire tested - Achieves Broof(t4) performance.
BBA Certified - Independently verified for a service life of 30+ years under normal conditions.
Long-term guarantee - Backed by the 25-year Proteus Waterproofing Guarantee.
Durability - Provides a resilient waterproof covering with proven dimensional stability.
Certified quality - Manufactured to ISO 9001, 14001 and 45001 standards.

Why Choose Proteus Pro-Felt® Ultima Plus?

High mechanical performance with APP-modified technology.
Flexible specification for warm roofs, overlays, or as part of a built-up system.
Root-resistant options for intensive or extensive green roof applications.
Proven longevity with independent BBA certification and system guarantees.

Proteus Pro-Felt® Ultima Plus combines proven APP-modified bitumen technology with system flexibility and long-term certification, making it the ideal choice for architects, contractors and specifiers looking for a reliable, BBA-approved waterproofing solution.

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