Bridges are continuously exposed to dynamic loads, structural movements and extreme environmental conditions. Constant exposure to water, de-icing salts, chemicals and thermal cycles can lead to the progressive deterioration of the bridge deck, compromising the long-term durability of the structure.
An effective waterproofing system acts as the primary protective barrier against these aggressive agents, preventing water ingress that can cause reinforcement corrosion, concrete cracking and increased maintenance costs.
Why choose a polyurea system?
Spray-applied polyurea membranes represent a significant advancement over traditional preformed sheet membranes. By creating a seamless, fully bonded membrane, they eliminate the weak points where water infiltration typically occurs.
Their key benefits include:
- Seamless waterproofing with no joints.
- Outstanding mechanical and chemical resistance.
- High elasticity and excellent crack-bridging capability.
- Extremely fast curing.
- Excellent resistance to hot asphalt application.
- Enhanced durability and reduced maintenance requirements.
Rayston Proof PUA H BRIDGE: a complete system for bridge deck waterproofing
Krypton Chemical has developed Rayston Proof PUA H BRIDGE, a complete system specifically designed for the waterproofing of bridges and viaducts.
The system consists of:
- Rayston Epoxy 100, a high-adhesion epoxy primer.
- Impermax Polyurea H Flex, a hot spray-applied polyurea membrane that forms the core of the waterproofing system.
- Porosity Sealer Flex, a sealing and bonding coat designed to ensure optimum adhesion of the subsequent asphalt layer.
The compatibility of all system components ensures a continuous, durable waterproofing solution capable of meeting the demanding requirements of modern transport infrastructure.
Impermax Polyurea H Flex: the key component of the system
Impermax Polyurea H Flex is a hybrid polyurea membrane applied by hot-spray, which provides high-performance protection against water and aggressive agents.
Its main features include:
- Seamless membrane with no joints.
- Excellent adhesion to the substrate.
- High elasticity.
- Outstanding mechanical and chemical resistance.
- Resistance to temperatures of up to 250°C during hot asphalt application.
- Cure time of just a few seconds, significantly reducing installation time.
In addition, the system holds a European Technical Assessment (ETA) and CE marking for bridge deck waterproofing, confirming its suitability for this type of infrastructure application.
Successful project: Grand Faw Port (Iraq)
The performance of the system was demonstrated during the waterproofing of the access bridge to Grand Faw Port, one of the largest port infrastructure developments in the Middle East.
A total of 25,000 m² of bridge deck was waterproofed using the Rayston Proof PUA H BRIDGE system, comprising Rayston Epoxy 100, Impermax Polyurea H Flex and Porosity Sealer Flex. The result was a seamless, high-performance waterproofing membrane capable of withstanding the demanding service conditions of this major infrastructure project.
Solutions for more durable infrastructure
With Rayston Proof PUA H BRIDGE, Krypton Chemical offers a complete waterproofing solution for bridges and viaducts that combines rapid installation, maximum watertightness and outstanding mechanical and chemical resistance.
The result is better protected infrastructure with an extended service life and reduced maintenance requirements, making it the ideal solution for both new construction and refurbishment projects.
