Heat-bonded · Cement dams · Leak repair
Torch-On Dam Lining
Torch-on bitumen membranes for cement dams, canals and rigid reservoirs — bonded waterproofing where HDPE sheet lining is not the right fit.
Torch-on bitumen lining bonds to prepared concrete, gunite and rigid dam structures through heat-welded laps — ideal for cement farm dams, canals and older reservoirs where a sheet geomembrane cannot anchor to earth batters alone. Damtech applicators prime substrates, lay modified bitumen membranes and detail penetrations for a continuous waterproof barrier.
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Key Benefits
- Strong adhesion to prepared concrete and gunite
- Effective for localized leak repair and full relines
- 3 mm and 4 mm membranes for depth and traffic loads
- Heat-welded laps reduce seam failure risk
- 15–20 year service life on well-prepared substrates
- Suitable for canals, rigid tanks and cement dams
Specifications
- Membrane thickness
- 3 mm and 4 mm torch-on
- Best applications
- Cement dams, canals, rigid reservoirs
- Typical lifespan
- 15–20 years
- Application
- Torch-bonded to primed substrate
- Related service
- Roof and foundation waterproofing
Torch-On vs HDPE for Dams
Earth dams with soil batters are lined with HDPE or PVC sheet geomembrane. Cement or gunite structures — including some farm dams, irrigation canals and process reservoirs — are better served by torch-on bitumen that bonds directly to the rigid surface. We inspect first and recommend the system that matches structure type, not habit.
Application and Safety
Torch-on work is carried out by trained technicians with fire precautions and hot-work planning around active farms and industrial yards. Surfaces are cleaned, primed and dried before membrane runs; overlaps and penetrations are torched to full bond. For roofs and foundations using the same technology, see our bitumen waterproofing service.
Torch-On Dam Lining projects
View all projects →Compare all liner types on our dam liners overview.