Industry Overview
The roofing industry depends on resins that improve adhesion, durability and processing in bitumen-based membranes and coatings.
Velrez hydrocarbon resins enhance the performance of roofing materials by improving flow, flexibility, long-term stability and compatibility with polymer-modified bitumen systems.
Role of Hydrocarbon Resins in This Industry
Hydrocarbon resins are used in roofing because they provide:
- Better adhesion to aggregates, fillers and reinforcement layers
- Improved flow and workability during application
- Enhanced aging and oxidation resistance
- Increased flexibility and cohesion of the membrane
- Compatibility with SBS, APP and polymer-modified bitumen
- Improved softening point adjustment and stability
Key Benefits for This Industry
- Enhanced durability in extreme weather conditions
- Improved adhesion to mineral surfaces and reinforcement fabrics
- Better processing behavior for roll roofing and waterproofing membranes
- Compatibility with SBS, APP and PMB formulations
- Grades suitable for high-performance roofing compounds
Recommended Resin Types
For roofing membranes and bitumen systems, the following Velrez resin families are typically used:
- C9 Aromatic Resins – adhesion, cohesion, bitumen compatibility
- MA-Modified C9 Resins – improved bonding and polarity
- C5/C9 Modified Resins – balanced flexibility and softening point control
- Cycloaliphatic/Aromatic Resins – enhanced aging resistance and hardness
- DCPD-based Resins – improved UV stability and oxidation resistance
Recommended Velrez Grades
| Grade | Type | Softening Point | Key Benefit | Typical Use |
| Velrez 9Z4-110 | C9 Aromatic | 105–115°C | improved adhesion | polymer-modified bitumen (PMB) |
| Velrez 9Z4-120 | C9 Aromatic | 115–125°C | cohesion & stability | SBS/APP roofing compounds |
| Velrez 9YMA4-140 | MA-Modified C9 | 135–145°C | polarity for bonding | PMB roofing and waterproofing |
| Velrez TP9Q12-115 | Cycloaliphatic/Aromatic | 110–120°C | aging resistance | bitumen membranes and coatings |
| Velrez TP9Q12-135 | Cycloaliphatic/Aromatic | 130–140°C | hardness & durability | roofing membranes |
(Additional grades can be added depending on the formulation focus.)
How Mardan Supports the Industry
Mardan BV provides:
- Technical support for selecting the right resin for bitumen and PMB formulations
- Reliable supply through Velrez manufacturing partnerships
- Assistance with softening point control, adhesion and membrane performance
- A complete resin portfolio for roofing, road applications, coatings and adhesives