SikaSeal®-250 Migrating

Cement based, selected aggregates and active chemicals

12 months from date of production

Product must be stored in original, unopened and undamaged sealed packaging in dry conditions at temperatures between +5 °C and +35 °C.

~0.3 mm

~7 L of water for 25 kg of powder

~2.0 kg/l

≥ 1.0 mm (in two layers)

+10 °C min. / +35 °C max.

+10 °C min. / +35 °C max.

~30 min (+23 °C)

Apply 2^nd layer while 1^st layer is still fresh (wet on wet, 1–2 hours at 20 °C)

~2 kg/m²/mm

This figure is theoretical and does not allow for any additional material due to surface porosity, surface profile, variations in level or wastage, etc.

Substrate preparation

• Mechanical or very high pressure water blasting

Mixing

• Low speed (< 500 rpm) hand drill mixer
• Mixing container

Application

• Hand applied - slurry brush
• Wet spray - low pressure spraying machine

Curing

• Water spray equipment, moist geotextile membrane, polyethylene sheet

Pour the minimum recommended clean water quantity in a suitable mixing container. While stirring slowly, add the full bag of powder continuously to the water. Once a consistent mix has been achieved, continue mixing for 3 minutes. The consistency must be checked after every mix.

Thoroughly saturate the prepared substrate before application with clean water to achieve a saturated surface dry (SSD) surface. Before application remove excess water, e.g. with a clean sponge.

General

SikaSeal®-250 Migrating must be applied to the full surface area at the required layer thickness.

Hand Application

Apply mixed material onto the prepared pre-wet substrate by suitable slurry brush by working the slurry well into the substrate and without the formation of voids. A 2^nd layer should be applied ‘wet on wet’ after allowing 1^st layer to slightly stiffen to ensure full coverage of the surface and avoid ‘pin-holes’.

Sprayed Application - Wet Spray
The wet mixed SikaSeal®-250 Migrating shall be placed into the spraying equipment and applied onto the prepared pre-wet substrate. A 2^nd layer should be applied ‘wet on wet’ after allowing 1^st layer to slightly stiffen to ensure full coverage of the surface and avoid ‘pin-holes’.

Protect fresh mortar immediately from premature drying using an appropriate curing method, e.g. water spray, moist geotextile membrane, polyethylene sheet, etc. Cure at least for 5 days after application.

Clean all tools and application equipment with water immediately after use. Hardened material can only be mechanically removed.