That’s why it’s important to choose a waterproofing membrane that has been proven effective, of high quality and durable enough to guarantee the moisture integrity of a building. At Projex Group, we only specify waterproofing solutions that have been tried and tested in the Australian climate with a proven track record of 20 years or more.
Residential, Commercial, Industrial, Civil, and Marine Waterproofing
Choose from two of the very best German-manufactured waterproofing solutions

Wolfin
The Australian standard in waterproofing
AS 4654.1 Compliance
First introduced in 1963, Wolfin polymeric PVC is considered the leading waterproofing system in the industry and has been successfully used throughout the world, in all climates and weather conditions.
Wolfin can be loose laid or bonded and is a flexible polyester PVC sheet membrane, which has outstanding mechanical, chemical & elongation properties.
Due to its high quality composition & inspection regime, Wolfin is the ideal waterproofing system for an extensive range of residential, commercial, civil, industrial, marine, education and health projects.
Wolfin membranes are compatible with and can be installed directly over bitumens, asphalt, failed sheet & liquid membranes and is suitable for most finishes.
Key benefits at a
glance
- Warranty offered on both labour and materials
- Superior German manufacturing
- Clean application with waste that can be recycled
- Effectiveness across a wide range of temperatures
- Extremely high tear and puncture resistance
- Speed of application and weather tolerance
- Long service life reducing life cycle costs
- Comply to Australian Standards (AS 4654.1)
Plus, as part of our commitment to providing exceptional customer service, the team at Projex will provide on-going customer service, and technical support for any Wolfin applications. What’s more, we also conduct Quality Assurance inspections to ensure the high standards of Wolfin have been achieved.
Find Out MoreCosmofin
Delivering proven high quality waterproofing
AS 4654.1 Compliance
Known for it’s reliable, long-term performance, Cosmofin is manufactured by extrusion and comes factory-finished with a homogeneous (capillary-free) membrane edge.
The product is a UV stable PVC waterproof membrane equipped with a central glass non-woven inlay.
Due to its high-quality formulation it’s the perfect waterproofing solution for a diverse range of residential, commercial, civil, industrial, and marine construction projects.
In the past our customers have used Cosmofin in the construction of flat roofs, balconies, terraces, podium slabs, under tile applications, retaining walls and planter boxes.
Key benefits at a
glance
- Warranty offered on materials
- Superior German manufacturing
- Clean application with waste that can be recycled
- Effectiveness across a wide range of temperatures
- Extremely high tear and puncture resistance
- Speed of application and weather tolerance
- Long service life reducing life cycle costs
- Comply to Australian Standards (AS 4654.1)
Plus, as part of our commitment to providing exceptional customer service. Projex Group P/L offer a full & comprehensive back up service for all Cosmofin installations.
Find Out More