Description
wedi 620 Sealant is a single-component, ready-to-use, polymer sealant. It is used as a system component for wedi building boards with vapour membrane barrier applied in the factory and across the entire range of wedi sealing membranes. Comes in 290ml tubes.
wedi 620 Sealant is for the waterproof adhesion of wedi sealing tapes, corners & gaiters, combined with the wedi Subliner Dry/Subliner Dry & Flex sealing membranes and the wedi Vapor 85 / wedi Vapor 85 N building boards.
In addition, the joint areas of the wedi Subliner Dry and wedi Subliner Dry & Flex sealing membranes can be bonded and sealed with wedi 620. For wedi Subliner Dry, the joint connections can be realised as overlaps or with a sealing tape. The joint areas for wedi Subliner Dry & Flex are always butt jointed and bonded with wedi sealing tapes and wedi 620 Sealant.
wedi 620 Sealant is water-resistant and reacts to form an elastic adhesive in the presence of humidity. It has excellent weather and chemical resistance. wedi 620 Sealant is free of solvents, silicon and PCPs and has low shrinkage.
Application:
wedi 620 Sealant should be applied to the bonding surface with no bubbles and with good coverage (thickness max. 3 mm). For surface bonding, wedi 620 Sealant should be thinly spread on the surface with a fine grooved spatula or similar. The sealant is applied to the surface approx. 10 mm beyond the border areas of the sealing tape, moulded part or sealing sheet.
wedi Sealing corners, sealing tapes or moulded parts 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. Folds and distortions should be smoothed out and pressed down. The hardening time can be reduced by moistening slightly with water and high temperatures. Once the wedi 620 Sealant has hardened, tiling can begin.
If wedi sealing membranes are applied with an overlap (wedi Subliner Dry), wedi 620 Sealant is applied to the overlapping area (min. 5 cm) and spread with a suitable smoothing trowel. The overlapping sealing membrane is then pressed into the adhesive bed (e.g. with a trowel or pressure roller). Material which escapes is smoothly removed with a smoothing trowel.
If wedi sealing membranes are butt jointed (wedi Subliner Dry or wedi Subliner Dry & Flex), they are bonded to one another and sealed at the joint with sealing tape. wedi 620 Sealant is applied to both sides of the joint area with a suitable smoothing trowel. The sealing tape is then pressed into the adhesive bed (e.g. with a trowel or pressure roller). Material which escapes is smoothly removed with a smoothing trowel.
Sealant which has not hardened can be removed while wet using rubbing alcohol or white spirit. Once hardened, it can only be removed mechanically.
Technical Data:
Colour: anthracite
Basic raw material: silane-modified polymer (SMP)
Hardening system: through air humidity
Density: ca. 1.45 g/ml
Solvent content: 0 %
Isocyanate content: 0 %
Drying agent content: ca. 100 %
Elongation at break: ca. 250 %
Skin formation: after approx. 15 minutes
Through-hardening (+23°C / 50% RH): approx. 3 mm per 24 hours
Permissible total movement: ca. 20 %
Processing temperature: do not use at below +5°C
Temperature resistance: -40°C to +100°C up to +180°C for a short time (max. 30 minutes)
Frost stability: not frost-sensitive
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Impressive adhesive/sealant as part off the Wedi system.