Description
Characteristics & Advantages
• Excellent stability when exposed to stresses such as movement and temperature extremes.
• Reinforced polyester allows the sheet to be flexible, durable and resistant to heat, aging and puncture.
• Uniform thickness of 3-4 mm.
• Easily installed using flame torch methods.
• Good chemical resistance.
• Water and vapour proof.
Features
• Standard thickness
• Exposable to UV
• Trafficable
• High tensile strenght
• Puncture resistant
• Good bonding
• Best for maintenance work
Application Area
• Kitchen area
• RC flat roof
• Balcony
• Car porch roof
• Driveway
• RC gutter
• Planter box
• Toilet / Bathroom
Application Tools
• Torch gun
• Roller (For Primer)
Uses
• Used as a waterproofing membrane on flat or pitched roofs (as an exposed or concealed system), foundations and basements, terraces and balconies, cut and cover tunnels, and subways.
• Can be applied in single layer or multi layer applications.
Surface Preparation
Clean the dusty surface, remove cement ash and trashed, ensure the surface is good to receive waterproofing.
Application
For repairing work, remove any existing waterproofing systems such as torch-on membrane, acrylic coating, or PU coating on top of the screed. Verify that concrete or screed surfaces are sound, clean, and compatible with the new waterproofing treatment. Repair defects like honeycomb, water ponding points, and cracks using cement grout, patching mortar, or epoxy grout. Apply a thin bitumen primer coat at 0.25kg/m². After priming, apply the Obaproof TO-1000 torch-on membrane, starting with the gutter/scupper drain, then the floor (from low to high gradient), and lastly the skirting. Use a torch gun to torch the Obaproof TO-1000 evenly to make sure all surfaces are torched and stick on the floor, especially the overlapping area that must be fully torched to create the best bonding on the joint. Conduct a 24 to 48-hour water ponding test (depending on consultant approval and site conditions) after applying the waterproofing membrane, and check the soffit on the second day to ensure there are no watermarks or leaks.
Curing Time
Bitumen primer curing time at 4-hours depend on weather condition.
Dosage
• Minimum at 1 layer
• Overlap: 75mm
• Vertical height: 300mm upturn and above
Note
• A thin layer of primer by bitumen coating is required.
Cleaning of Tools
Any bitumen primer can be cleaned by clean water or thinner.
Others
Material selection: There are two types of Obaproof TO-1000 torch-on membrane: The mineral surface is usually for an exposed system and the sand surface needs a cement screed.
Protection: During curing time and water ponding test, the prevention of human traffic into the area is required.
Technical Data
• Dimension: 1m × 10m
• Weight (mineral type): 4.5kgs/m²
• Crack bridging: > 2mm
• Tensile Strength: > 5.4 Mpa
• Elongation at break: 63%
Safety
Prevent bitumen primer from coming into contact with the eye. During torch on work, suggest to fully cover with non-flammable material and work carefully, especially during the heavy wind.