wedi 520 Waterproofing Membrane is a flexible, two-component waterproofing sealant for sealing all joints and cracks in wedi Tile Backer Board installations in wet rooms, showers and all other areas. It comes in two parts as a 30kg unit – a 20kg powder component and a 10kg liquid additive, in the correct size for the optimal mixing ratio.
wedi 520 is waterproof and frost-resistant, for universal indoor and outdoor use on walls and floors in both humid and wet areas, such as balconies, wash rooms, as well as in toilet and shower facilities. wedi 520 is ageing-resistant, not susceptible to environmental influences. It is also suitable for crack-bridging, provides good protection in the case of subsequent surface cracking.
For all uses, a minimum dry layer thickness of 2 mm is required. 2.4 mm wet layer thickness corresponds to 2 mm dry layer thickness. wedi 520 must be applied in at least two applications, each with full area coverage.
Use wedi 520 with wedi Sealing Tape, Corners and Sealing Gaskets for sealing joints between boards and shower trays, corner junctions, pipe and drain outlets.
Consumption per m² (for surface sealing):
wedi 520 component A (powder) at 2 mm dry layer thickness (approx. 2.4 mm wet layer thickness): approx. 2.8 kg/m².
wedi 520 component B (fluid) at 2 mm dry layer thickness (approx. 2.4 mm wet layer thickness): approx. 1.4 kg/m².
Therefore a single 30kg unit will cover 7.1m².
Consumption per linear metre (for joint sealing):
wedi 520 component A (powder) at 2 mm dry layer thickness (approx. 2.4 mm wet layer thickness): approx. 0.28 kg/linear metre.
wedi 520 component B (fluid) at 2 mm dry layer thickness (approx. 2.4 mm wet layer thickness): approx. 0.14 kg/linear metre.
Therefore a single 30kg unit will cover 76 linear metres.
Composition: Powder component: Special cement mortar with selected admixtures and additives. Fluid component: modified acrylate dispersion
Mixing ratio: 10 kg liquid component to 20 kg powder component
Density of mixed material: ca. 1,36 kg / l
Curing time: approx. 3 minutes
Processing time (at +20 °C / 50 % relative humidity): approx. 45 mins
Processing temperature: +5 °C to +25 °C
Number of work days: at least two
Drying time: approx. 3 hours per layer applied
Rain resistance: at 5 °C approx. 6 hours, at 20 °C approx. 3 hours
Load-bearing capacity (at + 20 °C and 50 % relative humidity): Can be walked on after approx. 6 hours*. Ceramic covers can be applied after approx. 12 hours*, can be exposed to contact with water after approx. 3 days*. * Higher temperatures and humidity will reduce the specified times, lower temperatures will extend them.