
Waterproofing
Overview
A vital part of any project
Normet’s proven waterproofing solutions have been used for over 30 years in tunnelling projects to prevent water ingress or egress.
Normet’s proven waterproofing solutions have been used for over 30 years in mining and tunnelling projects to prevent water ingress or egress. Our portfolio covers all needs in areas such as tanks, tunnels, subway stations, basements, storage tanks and lift shafts.
All our products use the latest high-performance technology for safe, efficient and environmentally friendly use, helping to reduce project costs and carbon emissions. Wherever water needs to be detained or retained, Normet has a product or system to do it.
Spray applied waterproofing
For waterproofing in underground construction, the TamSeal range provides exceptional performance, resisting the ingress of water and waterborne contaminants and providing guaranteed long-lasting protection.
Sheet waterproofing membranes
Normet's range of proven sheet membranes is perfect for protecting large concrete surfaces, foundation slabs, retaining walls and tunnels, all designed for a wide range of uses and environments and featuring excellent characteristics.
Waterproofing Products

Spray Applied Waterproofing
TamSeal spray-applied waterproofing membranes are engineered to resist water ingress and waterborne contaminants, delivering long-lasting protection for underground structures. These membranes exhibit high resistance to both positive and negative water pressure and are ideal for use in tunnels, basements, and water-retaining structures. Easy to apply in varying thicknesses, TamSeal systems ensure seamless coverage, fast installation, and exceptional durability—even in complex geometries and aggressive environments.

Normet Sheet Waterproofing Membranes
Normet’s proven sheet waterproofing membranes are engineered to protect large concrete surfaces such as foundation slabs, retaining walls, and tunnels. Designed for diverse environments and applications, these membranes deliver reliable performance and superior durability.
Success Stories

MMC Gamuda Sdn Bhd
KVMRT Station Project, Kuala Lumpur, Malaysia - Waterproofing - Optimisation
Early completion with our full waterproofing installation package
Processes and products
Waterproofing , TamSeal 2000, TamSeal BR, Injection Tube RI system
KVMRT Station Project, Kuala Lumpur, Malaysia - Waterproofing - Optimisation ;Learn more
Samsung C&T Corporation
Caldecott Station, Singapore - Waterproofing Solutions
The first mined tunnel in Singapore to use spray applied waterproofing membrane
Processes and products
Waterproofing , TamSeal 800
Caldecott Station, Singapore - Waterproofing Solutions ;Learn more
BFK – Bam Ferrovial Kier JV
Crossrail Farringdon Station, United Kingdom - Waterproofing, Water Control - Optimisation
A combination of spray-applied membrane and sheet membrane enhances the best features of both systems
Processes and products
Waterproofing , Water Control , TamSeal 800
Crossrail Farringdon Station, United Kingdom - Waterproofing, Water Control - Optimisation ;Learn more