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Alchimica’s Exposed Metal Roof System is designed to deliver seamless, long-lasting waterproofing protection for both new and existing metal roof structures.
Metal roofs, while durable, are often prone to thermal movement, corrosion and leakage at joints and fixings.
Our system, based on advanced HYPERDESMO® liquid membrane technology, creates a fully adhered, elastic waterproof barrier that accommodates movement while protecting against water ingress and weathering.
Key features include:
- Excellent adhesion to galvanised steel, aluminium and other metal surfaces.
- UV and weather resistance for long-term durability in exposed environments.
- Highly elastic, accommodating structural movement and temperature changes.
- Corrosion-resistant formulation to extend the life of the roof.
- Ideal for both pitched and curved metal roofs, including industrial and commercial units.
Quick to apply and easy to detail around fixings and seams, Alchimica’s system offers a cost-effective alternative to replacement, extending the service life of metal roofs while reducing maintenance demands.
Explore more case studies
Refurbishment using Alchimica’s Hyperdesmo® Aqua for a seamless, fast-drying, weather-resistant coating over existing paint.
Alchimica’s advanced polyurethane waterproofing system was successfully applied to a newly constructed concrete bridge deck in the UK.
Makers Construction Ltd completed a 366m² waterproofing installation at Cardigan Fields, Leeds, using Alchimica® Hyperdesmo® polyurethane system.
Firing Range Roofing Renewal, in Castlemartin, Wales
The roofing renewal project at Castlemartin Firing Range, Wales, showcasing Hyperdesmo® waterproofing solutions.
Exposed Concrete Roof Waterproofing and Inverted Roof Applications in Vista vela Residences – Mexico.
ALCHIMICA® Mexico participated in the construction and development of Vista vela residences for waterproofing and protection of the roofs of the residence complex.
ALCHIMICA® was ready to contribute with its support and sponsorship to Panhellinios Gymnastics Club and renovate the floor of the team’s training ground.
Benefits of using Alchimica® products
- Easy to use
- No specialist tools required
- Can be used on a variety of existing substrates to seal or repair
- Quality, extremely cost effective products
Exposed Metal Roof waterproofing based on the HYPERDESMO® System
Priming
MICROSEALER-50
Sealing
HYPERSEAL®-EXPERT-150
Waterproofing (1st coat)
HYPERDESMO® SYSTEM
Reinforcement With Geotextile In Details
GEOTEXTILE-50 PRESSED
Waterproofing (2nd coat)
HYPERDESMO® SYSTEM
Topcoat Application
HYPERDESMO®-ADY-E
Exposed Metal Roof waterproofing based on HYPERDESMO® AQUA
Priming
MICROSEALER-50
Waterproofing
HYPERDESMO® AQUA


