Hydrotech MM6125 is the UK’s leading structural waterproofing system and has been trusted by architects and specifiers for more than 60 years. Designed for use on inverted roofs, podium decks, green roofs, blue roofs, and parking decks, it combines a hot melt rubberised bitumen membrane with a polyester reinforcement and a protection sheet to create a seamless, flexible monolithic waterproofing system engineered to last the lifetime of the building.
The range includes inverted and non-combustible thermal insulation options, a water flow reducing layer (WFRL), bituminous protection sheets, ancillary components, and inverted roof finishes.

Hydrotech MM6125 is a one-part, 100% solids, liquid applied thermoplastic waterproofing membrane designed to deliver a robust and reliable monolithic finish with no seams or joints. Polymer modified, and formulated with 30% recycled content, it supports sustainable construction objectives while offering certified dynamic crack-bridging capabilities to accommodate structural movement throughout the building’s life cycle. Its versatility allows it to be incorporated into zero and absolute zero falls designs and makes it well suited to projects requiring phased construction. With a proven track record of long-term durability, Hydrotech MM6125 contributes to an extended service life of the roof system.


Alumasc provides a comprehensive range of single-source warranties for Hydrotech MM6125, offering coverage for up to 40 years. Installed exclusively by Registered Contractors and underpinned by our extensive project support service, these warranties cover product, workmanship, and design.
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