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wedi sealant 620 Sealant for the waterproof adhesion of wedi sealing tapes, sealing corners, sealing gaiters, sealing membranes and wedi building boards with vapor membrane barrier applied in the factory.
Sealant for the waterproof adhesion of wedi sealing tapes, sealing corners, sealing gaiters, sealing membranes and wedi building boards with vapor membrane barrier applied in the factory.
Applications: wedi sealant 620 is used for the waterproof and vaporproof adhesion of wedi Subliner Dry, wedi sealing tapes, sealing corners, sealing gaiters, sealing membranes within the wedi Subliner Dry sheet membrane system, or where wedi sealing tape is used over wedi Vapor 85 building panel seams and fastener penetrations.
Surface requirements: The adhesive surfaces/ wedi product surfaces must be dry and free of grease and dust. Any contaminants such as separating agents, preservatives, grease, oil, dust, water, old adhesives/sealants and any other materials that could impair adhesion must be removed. Installation:
wedi sealant 620 should be applied to the bonding surface with no air bubbles/enclosures and with good full adhesion area surface coverage (thickness max. 1/8 in. / 3 mm). For surface bonding, wedi sealant 620 should be thinly spread on the surface with a fine grooved spatula or similar. The sealant is applied to the surface approx. ½ inch mm beyond the border areas of the sealing tape or area that would overlap with a Subliner Dry or sealing tape.
Sealing tape corners, sealing tapes or Subliner Dry overlapping sheets are inserted into the fresh adhesive layer and pressed on (e.g. with a trowel or pressure roller) so that the sealant is pushed out of the sides. The excess material is smoothly removed with a smoothing trowel or putty knife.
Folds and distortions should be smoothed out and pressed flat. Once the wedi sealant 620 has cured, tiling can begin. The cure time will be extended by the water/vapor proof enclosure of the sealant beneath a wedi sealing tape or Subliner Dry sheet. Higher temperature and higher humidity on the installation site speed up the curing process ( reverse conditions slow the curing process). Initial curing may take 24-48 hours. The sealant should be fully cured and ready for water and vapor exposure through the application after 96 hours.