Waterproofing system
Bitumen Membrane Waterproofing Systems
Bitumen membrane systems use prefabricated APP or SBS modified sheets torch-welded at laps to form a continuous waterproof barrier. Petroseal manufactures PetroGrip APP and SBS membranes in Pakistan and specifies them by exposure: APP for heat/UV-exposed roofs, SBS for flexible below-grade and movement-prone detailing.
System build-up
- Prepared concrete or approved substrate
- Bituminous primer
- PetroGrip APP or SBS membrane (single or multi-layer as designed)
- Protection screed, insulation, or UV-stable surfacing as required
Substrate
- —Sound concrete
- —Compatible existing bituminous substrates when refurbishing
Critical details
- —Side and end laps fully torched
- —Upstands and terminations
- —Penetrations flashed
Limitations
- —Plain film finishes are not permanent UV exposure surfaces
Installation sequence
- Prime
- Align rolls
- Torch-bond
- Seal details
- Protect
Related applications
- Roof Waterproofing Pakistan
Roof waterproofing in Pakistan must resist high UV, summer temperatures, monsoon wetting, and follow-on traffic during m…
- Basement Waterproofing Pakistan
Basement waterproofing in Pakistan typically requires a positive-side membrane system designed for hydrostatic pressure,…
- Foundation Waterproofing Pakistan
Foundation waterproofing protects structural concrete against ground moisture and hydrostatic pressure. Petroseal uses b…
- Industrial Waterproofing Pakistan
Industrial waterproofing covers plant roofs, process floors, bunds, and containment where chemical exposure, abrasion, o…
Related products
- PetroGrip APP
APP-modified torch membrane—2mm to 4mm with plain, aluminum, or granular surfacing.
- PetroGrip SBS
SBS-modified torch membrane—3mm and 4mm with plain, aluminum, or granular surfacing.
Related projects
- Allama Iqbal International Airport
Lahore
- Honda Car Plant
Multan Road, Lahore
Technical downloads
- PetroGrip APP Polyester Fiberglass Membrane TDS
APP-modified torch-applied membrane with composite polyester + fiberglass reinforcement — 3 mm and 4 mm plain PE film finish.
- PetroGrip SBS Waterproofing Membrane TDS
Polyester-reinforced SBS-modified torch-applied bitumen membrane — 3 mm nominal thickness, 60/70 bitumen base.
Technical guides
- APP vs SBS Bitumen Membrane: Which PetroGrip System Fits Your Project?
Compare PetroGrip APP and SBS torch-applied membranes—modifier chemistry, surfacing options, and where each system belongs in roof and below-grade build-ups across Pakistan.
- Torch-Applied Waterproofing: PetroGrip Site Practice
How PetroGrip torch-applied bitumen membranes are specified, primed, and welded on roofs and podiums—with quality checks that protect your warranty.
- 3mm vs 4mm Waterproofing Membrane: When to Specify Each in Pakistan
Thickness selection for PetroGrip APP and SBS torch membranes—substrate condition, traffic, double-layer basements, and what 3mm or 4mm actually changes on site.
- Sheet Membrane vs Liquid Waterproofing: Selection for Pakistani Sites
When PetroGrip torch sheets win on laps and thickness control—and when polyurethane or polyurea liquids suit complex geometry, tanks, and details.
FAQ
- APP vs SBS in a bitumen system?
- APP suits exposed roof cap sheets in hot climates. SBS suits basements and details needing higher flexibility. Petroseal produces both.