Sika® Tite Undertile

AS/NZS 4858: Wet area membranes - Class III

12 months from date of manufacture in original, sealed containers, if the storage conditions are met.

Store in dry environment, protected from direct sunlight at temperatures between +5˚C and +25˚C

Allow a minimum of 8 hours curing prior to applying finished covering, and a minimum of 5 days to cure before flood testing. Allow longer in cool or cold weather conditions.

Apply two coats to achieve a minimum dry film thickness of 1.0mm.

Application rate of 0.75mm wet film thickness per coat.

SUBSTRATE PREPARATION

All surfaces to be waterproofed must be firm, clean, dry, structurally sound and smooth. All grease, oil, wax, curing compounds, dust, loose material, laitance and other contaminants must be removed. All projections and rough spots should be dressed off to achieve a level surface. The substrate surface must be continuous and not pond water. 

Concrete

Allow at least 28 days for the concrete to cure. Concrete should be left with an open surface – standard wood float or broom finish. All traces of curing compounds or sealers should be removed prior to application. Old concrete must be thoroughly cleaned and washed and allowed to dry. The surface should be even unless falls are incorporated where required, imperfections to be repaired with a suitable Sika^® Mono- Top repair mortar.

Sand / Cement Screeds and Renders

The screeds and / or renders must conform to the appropriate standard and should be left with a wood float finish and left to cure for at least cure for 7 days.

Building Boards

Water resistant plasterboard, fibrous cement sheeting, marine ply must be solidly fixed in accordance with the manufacturer's instructions specifically for tiling. The area must be primed with ECO SYSTEMS^® Eco Prime WB, particularly where a jointing compound has been used.

Particleboard

Particleboard must be fixed in accordance with the manufacturer's instructions specifically for tiling and meet minimum deflection standards for tiling. Secure floor with additional fixings and wedges, sand any surface contamination after initial preparation. The area must be primed with ECO SYSTEMS^® Prep 'N' Prime.

Static Crack & Sheet Joint Treatment

For static cracks 0.5 – 3mm wide rout out and clean thoroughly before filling with Sika^® Neutral Cure silicone to form a Bond Breaker, For all sheet joints and seams clean thoroughly and fill with Sika® Neutral Cure silicone to form a Bond Breaker, apply a liberal coat of Sika® Tite Undertile extending 100mm either side of the crack and place Aqua Blök^® reinforcing bandage into the wet membrane, press down firmly to ensure good contact, apply another liberal coat of Sika® Tite Undertile to the entire surface to embed the bandage. For dynamic cracks, expansion joints and control joints contact Sika^® technical service for advice.

BOND BREAKER  / CONNECTOR SEALANT

Suitable bond breaker: Any Sika neutral cure silicone sealant

Suitable connector sealant: SikaFlex Fillet or SikaFlex construction AP

Sika® Tite Undertile is a membrane with high extensibility and is designed for use with a 12mm Bond Breaker, a bead of Sika® Neutral Cure silicone must be tooled off to form a 12mm wide bond breaker. A bond breaker must be installed at areas subject to movement, wall/wall junction, wall/floor junction, sheet joints and seams, penetrations and where there is a change in the direction or substrate type.

Clean tools and equipment with clean water while the material is still wet. Cured coating can only be removed mechanically.