Bitumen cap sheet membranes are the exposed upper layer of a multi-layer bituminous roofing system, providing the primary defence against UV exposure, weathering and environmental conditions. SikaShield® cap sheet membranes are available in a range of torch-applied and self-adhesive options, incorporating both APAO and SBS modified bitumen technologies to suit different project requirements. The range includes solutions offering enhanced flexibility, fire performance, Safe2Torch compatibility and specialised surface finishes.
Comparison of Sika's Bitumen Cap Sheets
SikaShield® HB79 MG 4 mm is a torch-applied SBS and APAO modified bitumen membrane designed as a highly durable exposed cap sheet for flat roof waterproofing systems. The mineral granule finish provides permanent UV protection and helps protect the membrane from damage from mechanical impact. The membrane has an exposed strip without granules allows secure sealing of overlaps during installation.
Key features:
- SBS and APAO modified hybrid bitumen technology
- Mineral granule finish for exposed applications
- Highly durable
- Highly flexible in cold temperatures
- FM Approved
- Torch-applied installation
SikaShield® E79 MG SA 4 mm is a self-adhesive cap sheet membrane developed for use in Safe2Torch areas where flame-free installation is preferred. It has the same properties as SikaShield® HB79 Tex 4 mm but features a self-adhesive underside for bonding.
Key features:
- Self-adhesive installation
- Suitable for Safe2Torch applications
- Flame-free application
- Mineral granule finish for exposed applications
- Highly durable
SikaShield® HB79 Tex 4 mm is an SBS and APAO modified bitumen membrane with its top surface coated with texflamina – a propylene non-woven fleece. It combines durability, flexibility and easy installation, and is suitable for a wide range of flat roof and inverted roof applications.
Key features:
- SBS and APAO modified hybrid bitumen technology
- Suitable for use as a cap sheet for inverted roof applications
- Highly durable
- Highly flexible in cold temperatures
- Torch-applied installation
SikaShield® E75 MG Pure-Air 5 kg/m² is an SBS modified bitumen membrane with an additive that improves air quality. The catalytic slates on its top surface help reduce pollution caused by NOx compounds.
Key features:
- SBS modified bitumen membrane
- Improves air quality
- Good solar reflectance
- Mineral granule finish for exposed applications
- Highly flexible in cold temperatures
- Torch-applied installation
SikaShield® E75 MG 4.5 mm is an SBS modified bitumen cap sheet membrane with enhanced fire resistance. Reinforced with non-woven polyester fabric stabilised with glass fibre, it is designed for exposed roof applications where durability and performance in varying weather conditions are required.
Key features:
- SBS modified bitumen technology
- Increased fire resistance
- Highly flexible in cold temperatures
- Mineral granule surface for UV protection in exposed applications
- Polyester and glass fibre reinforcement
- Torch-applied installation
