Polyprufe HA (Hand Applied) is an alternative to Polyprufe spray applied roof and deck waterproofing, and is ideal for smaller contracts where it is not practical or economical to take all the spray equipment to site.

The Polyprufe HA has all of the properties of the spray applied POLYPRUFE but cannot be applied as quickly or to vertical surfaces.  Like POLYPRUFE spray applied,  polyprufe HA is the ultimate seamless roof and deck waterproofing system and can be applied over concrete, timber, metal, and insulation. 

It is also very cost effective compared to other systems.  Find out more here: Hand applied flex 

The worlds longest bridge, the Jiaozhou Bay Bridge in north-eastern Shandong Province, China made the Forbes list of the worlds 11 most incredible bridges in 2011.

Construction of the Jiaozhou Bay Bridge (also known as Qingdao Haiwan Bridge) officially started on June 30th 2007.  At 26.4 miles long the bridge is the longest sea spanning bridge in the world, connecting Qingdao and Huangdao.  Chinese officials said the bridge was designed to be strong enough to withstand a magnitude 8 earthquake, typhoons, or the impact of a 300,000 ton vessel and according to the judges, 'Construction of the bridge is a technological miracle', hailing China's advanced level of architecture and technological development.

The bridge was completed on June 28th 2011.  The design lifetime is 100 years, which requires not only durable concrete technology but also high performance protective coatings.  After a long period of survey and investigation, pure polyurea became the best choice for this protective aim.  The bridge was actually coated with polyurea coating during construction.  The polyurea was provided by Qingdao Shamu International Trade Co. Ltd.

The application was completed successfully under the supervision of Dr Weibo Huan, a professor at Qingdao Technological University, who is a pathfinder of polyurea technology and the chief scientist on the Beijing - Shanghai High Speed Railway polyurea protective project.  

The Jiaozhou Bay Bridge is located in North China, where there are 50-60 days of frozen-thawed time per year.  The bridge required:

• A versatile coating with fast cure against high humidity.
• High thick film building, high tensile strength.
• High elongation at break.
• High impact resistance.
• High abrasion resistance.
• UV stable with 100 years durability.

All of the above criteria were achieved with the use of polyurea

MacLennan have carried out another Polyurea tank lining installation this one in Salisbury , Wiltshire. The GRP Tank was leaking. The Polyurea tank lining system was chosen under advice from Maclennan THE Polyprufe Polyurea can completely replace the existing tank without having to remove it.

The MacLennan team are all trained in working in confined spaces. The tank was accessed through lifting gear and ventilated with extraction units. The join between the tank and the concrete base was lined. The tank was primed and then sprayed with the Polyprufe Polyurea tank lining system.

The system was dried in 10 seconds and could be filled with water almost immediately

The system is more durable and flexible than epoxy tank lining systems  and GRP Tank liners and can be installed in one day meaning very little down time.

The result was a tank lining installed in a day and guaranteed for 10 years.

Yet another very professional Polyprufe installation by MacLennan