wedi 620 Vapor Sealant - single component sealant

wedi 620 is a single-component, ready-to-use, polymer sealant. It is indispensable to use in combination with wedi Vapor 85 building boards in areas with high-level of humidity and alongside wedi sealing tapes, sealing corners, sealing gaiters, sealing membranes. Its spreadable consistency makes joint sealing a breeze.

Features and benefits:

• Its versatility makes it suitable for one-step bonding and sealing the joints of; wedi Subliner sealing membranes, wedi Vapor 85 building boards with vapour membrane barrier applied in the factory.
• Reacts to form an elastic adhesive in the presence of humidity.
• It has excellent weather and chemical resistance.
• The product is free of solvents, silicon and PCPs and has low shrinkage.

Application details:

wedi 620 should be applied to the bonding surface with no

bubbles and with good coverage (thickness maximum 3 mm). For surface bonding, wedi 620 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.

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 has hardened, tiling can begin.

If wedi sealing membranes are applied with an overlap (wedi Subliner Dry), wedi 620 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 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.