MasterTop® P 650
Two-component solvent free epoxy surface sealer and primer
For use with MasterSeal M860 & M861 Polyurea
MasterSeal M860 and M861 are hand applied, nonsolvented, 2-component, elastomeric polyurea coatings.
MasterSeal M860 is self-levelling.
MasterSeal M861 is thixotropic for applications to steeply sloping and vertical surfaces.
FIELD OF APPLICATION
MasterSeal M860 and M861 are used in a variety of concrete waterproofing applications including roofing, balconies, terraces, podium decks, car park decks and water industry applications.
Two-part, hand-applied, rapid-curing, hydrophobic and chemically resistant polyurea waterproofing membrane
When you have essential waterproofing requirements or repairs and need to get facilities back into service as quickly as possible, a fast-track waterproofing membrane can save money. MasterSeal is a two-part, hand-applied, rapid-curing polyurea membrane that enables structures to be recommissioned with minimal downtime. It provides long lasting waterproofing with high elasticity for thermal movement. As a seamless coating (no joints or overlaps) there is no risk of leaky joints with excellent crack-bridging and chemical resistance.
MasterSeal - Polyurea can be easily and seamlessly applied by brush, roller or squeegee.
FEATURES AND BENEFITS
- Monolithic – no laps, welds or seams
- Fully bonded
- High water vapour permeability
- Excellent mechanical properties
- Excellent crack bridging capability
- Resistant to puncture
- Resistant to standing water
- Mhermoset – does not soften at high temperatures
- Remains elastic at low temperatures eg approx. - 45ºC
- Rapid curing: accepts light foot traffic after 4 hours at 20ºC
- Hydrophobic material, so waterproofs the roof instantly
- Highly elastic, can bridge cracks
- Non-slip top coat available
- High tensile and tear strength, meaning the membrane remains durable where others tear
MasterSeal M860 Typically 1.35kg/m² per mm thickness. Minimum membrane thickness: 1.5mm.
MasterSeal M861 Typically 1.05 kg/m² per mm thickness. Minimum membrane thickness: 1.5mm
Application - Brief Guide (always refer to an up to date datasheet)
The preparation of the substrate and the use of the appropriate primer are of paramount importance. All surfaces to which MasterSeal M 860 is applied should be sound, clean and dry and free from oil or grease, loose particles and any other substances which may impair adhesion. For substrate pre-treatment prior to the primer application see primer technical data sheet.
Concrete and cementitious screed
Concrete and other cementitious substrates must have a minimum pull off strength of 1.5N/mm². Any laitance present on the surface must be removed mechanically. Shot blasting is the preferred method. Release oil and other contaminants which may impair adhesion must be removed prior to the application of the primer.
In roofing applications, the asphalt should be cleaned by high pressure water jetting. In mechanically stressed applications the load bearing capacity of the asphalt should be suitable for the intended use and should be shot blasted so that at least 60% of the surface aggregate is ex-posed (min. quality e.g. AS-IC10). Blisters should be warmed, redressed and a de-bond tape applied over. Bituminous felts Blisters should be opened, dried out and repaired. Major cracks should be repaired and taped with de-bond tape.
Warning: MasterSeal M 860 will not bond to black APP modified bitumen felts nor is a suitable primer available.
All joints should be flush and taped prior to the application of the primer. All fittings must be flush with or sunk lower than the surface.
Iron and steel
Should be sand blasted to SA 2½ finish prior to application of the primer
MasterTop P 650 is a high grade; low-viscosity, two-component epoxy primer and surface sealer. MasterTop P 650 is used as a sealer or scratch coat with, and without, the addition of quartz sand.
Suitable for the sealing of concrete surfaces, as well as for the filling of fissures and joints. T o improve adhesion MasterTop P 650 is sprinkled with quartz sand while still wet to create a mechanical key for subsequent coatings.
May be mixed with sand to the desired consistency to repair patches or form covings. In either case the mixed mortar must be applied to a surface previously coated with MasterTop P 650 resin and whilst still tacky. Consult your Master Builders Solutions representative.
Note: Refer to the Method Statement for Thin Section Epoxy Repairs if required using MasterTop P 650.
MasterTop P 650 is available in 15 kg units and is colourless.
Cement bound substrates:
The surface to be coated must be clean and required free of dust, oil and grease; it must be capable of bearing loads. Laitance must be removed by means of captive blasting, grinding or other suitable method.
- Cured at 7 days @20°C
- Pot Life (25°C): 20 min
- Density: 1.09 Bonding strength
- Greater than cohesive strength of typical good quality concrete substrate
- Application time approx. 20 min. at approx. 25°C
- Application temperature 10°C to 40°C substrate temp
- Recoatable after approx. 6 h at 30°C approx. 12 h at 20°C
Bitumen felt - MasterTop P 698
Concrete cementitious / screed - MasterTop P 617 or MasterTop P 650
Asphalt screed (mind. AS-IR10) - MasterSeal P 660 or MasterTop BC 375 N
Plywood (preliminary tests are recommended) - MasterSeal P 660 or MasterTop P 691 GRP / GFK MasterTop P 691
Iron and Steel - MasterTop P 681 Non-ferrous metals (e.g. aluminum, zinc) MasterTop P 684 Aged MasterSeal membrane MasterTop P 691