Description
ULTRAFLEX® – High-Performance Liquid Waterproofing System
Cold-Applied, Single-Component, Seamless Protection for Roofs & More
ULTRAFLEX® is a BBA-certified, NHBC-approved, cold-applied polyurethane liquid membrane formulated for waterproofing both new and existing roof surfaces. This single-component, moisture-reactive system forms a fully bonded, joint-free barrier with a service life of over 25 years—delivering durable, seamless protection across a wide range of substrates.
Key Benefits
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✅ No Primer Required for Most Surfaces – Apply straight from the tin to save time and reduce material costs
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✅ Cold-Applied & Fast-Curing – Instantly waterproofs without waiting or mixing
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✅ Zero Wastage – Use what you need with minimal product left over
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✅ Dark Grey Finish – Tough, long-lasting surface with a clean aesthetic
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✅ Fully Seamless Membrane – No joints, overlaps, or weak points
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✅ Certified for Longevity – BBA-certified for 25+ years, NHBC-approved for building compliance
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✅ Versatile Compatibility – Bonds to felt, asphalt, single-ply, concrete, plywood, metals, and more
When to Use Ultraprime PRO
While ULTRAFLEX® typically does not require a primer, Ultraprime PRO is recommended in the following conditions for enhanced adhesion and membrane performance:
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Rough or Porous Concrete Surfaces – Improve coverage and ensure a smoother finish
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High-Stress Environments – Such as car parks or areas demanding higher mechanical resistance
These recommendations are manufacturer-approved by Eagle, ensuring optimal system performance and durability.
Ideal For Waterproofing:
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Flat & sloped roofs
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Balconies and terraces
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Car park decks
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Drainage channels and canals
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New builds and renovation projects
Seamless System with Ultraflex Matting
For reinforced performance, ULTRAFLEX® should be used in conjunction with Ultraflex Matting, delivering additional strength and longevity across challenging substrates.
Available in Roof Kits & Bulk
Get full roof kits, pallet pricing, and export rates—reach out to our sales team today 01268 472358
ULTRAFLEX® provides a reliable, cost-effective, and long-lasting waterproofing solution, trusted by professionals worldwide.
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Introduction Videos
Coverage
1 tin of ULTRAFLEX® can waterproof 8–10 m2, depending on the type of surface.
Application Video
Benefits
- BBA certified for life in excess of 25 years.
- NHBC and Green Roof Approval.
- Ultraflex can be used on new or existing roofs, walkways, balconies, gutters, etc.
- Ready to use straight out of the tin, application with solvent resistant roller.
- Use fully reinforced with Ultraflex matting ensures easy ‘wet on wet’ application.
- Can be used all year round – moisture curing.
- Fully traffic-able when cured (24 hours).
- Instantly rain resistant once the matting is encapsulated.
- Once installed, forms a seamless membrane.
- Excellent adhesion to different substrates: plywood, bitumen membranes, asphalt, metals, brick, concrete, wood etc.
- Fresh concrete must be cured for 28 days.
- 15-year guarantee for non-trained installers, 20/25 years for trained installers
Application Overview
- Check the substrate is clean and in good condition.
- Application temperature must be between 5 – 35ºC.
- All trims must be fixed prior to Ultraflex application.
- Use Ultraflex sealant to seal any cracks or gaps.
- Open the drum and stir before applying Ultraflex.
- If product is left to stand on site, stir again before application.
- Apply Ultraflex liquid as described below, first to details and perimeters and then to the flat area.
- Apply Ultraflex liquid wet-on-wet by applying a generous coat of liquid first, then dry rolling the matting into the liquid and finally applying more liquid on top to achieve the required thickness. Ensure the matting is fully encapsulated without pinholes or tenting.
- At this stage the roof is watertight and will resist rain.
- Typical coverage is 8-10 sqm per drum although this may vary depending on substrate.
- After applying the waterproofing layer, check for pinholes or any dry areas that may require more liquid.
- Once the Ultraflex membrane is dry, apply a layer of Ultratop topcoat within 48 hours.
- Check the full application sheet for specific substrates and systems.
Note:
- On EPDM and TPO it is recommended to install a patch test to check compatibility.
- Do not use silicone sealants. Always use ULTRA-FLEX sealant or other compatible PU based mastics.
OSB Roof
Carrier Membrane
Corrugated Sheet
Ceramic Tiles
Overlay
Concrete Roof
Green Roof
Paving Tiles
Structural Waterproofing
Application Video
Pipe Application Video
Ultratop Application Video
Technical Information
| PROPERTIES | VALUES | METHOD |
|---|---|---|
| Specific gravity (kg/m³) | 1.320 ~ 1.420 | DIN 53 217 |
| Viscosity at 23ºC | 2.650 cps | ASTM D2196-86 |
| Dry extract | >90 | EN 1768 |
| Flash Point (ºC) | 42ºC | ASTM D93 |
| Ashes at 450ºC % weight | 42 ~ 47% | EN 1879 |
| Temperature | 2ºC and rising and not exceeding 30ºC | |
| Hardness Shore A at 23º | C > 75 | |
| Tensile strength | Reinforced with Ultraflex matting >10MPa * | |
| Dry time | 2-8 hours. Fully traficable 24 hours | |
| Overcoat time | ±5 ~ ±48 hours | |
| Elongation | >400% | |
| Water vapour resistance | µ=2.500 | |
| Concrete adherence | >2 MPa | |
*UN-REINFORCED Tensile strenght >3MPa
Warranty Information
NON TRAINED CONTRACTORS
15 YEARS: Ultraflex and Ultratop at the recommended coverage
TRAINED CONTRACTORS
20 YEARS: Ultraflex and Ultratop at the recommended coverage
25 YEARS: Ultraflex and Ultratop at the recommended coverage. Extra layer required 0,5kg
additional ultraflex
IBG – INSURANCE BACKED GUARANTEES
Offered to the contractors who have attended to a training, not demo.
Maximum length 20 years.
Cost 5% of the contract value
Must be requested prior to starting the job.
The IBG requires the contractor to be credit checked by the insurance Company and approval will
depend on his rating.
BALCONIES
10 years with ULTRAFLEX and ULTRATOP
15 years with ULTRAFLEX and ULTRATOP + aggregate sealed with clearcoat
20 years if protected with paving slabs
BOX GUTTERS
15 year with ULTRATOP
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