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SikeTite UnderTile Rapid:  


SikaTite UnderTile Rapid

Water based synthetic rubber waterproofing membrane for under-tile, and protected applications.  

Product Description

SikaTite UnderTile Rapid is a very fast curing, single component, waterproofing membrane.  

Uses

Under-tile, or protected waterproofing for use on most building substrates including; concrete, render, screeds, wet area wall sheets, fibre cement sheets, brick and MDF.  

Characteristics / Advantages

  • Excellent adhesion to most substrates
  • Can be used on green or damp substrates*
  • Very fast curing - can be over-coated in 1 hour, and over-tiled in 4 hours*
  • Pink when applied. Red when cured
  • Permanently flexible
  • Recommended for CTA tile adhesives, and levelling systems (polymer modified adhesive acceptable)
  • Anti-Microbial protection
  • Low VOC
  • Easy clean-up with water and detergent prior to curing 

Approvals / Standards Complies with Green Building Council of Australia VOC limit requirements (<250g/L)  

Product Data Form

Appearance / Colour Thixotropic liquid / Pink when wet. Dries Red  

Packaging 1, 4, & 15L pails  

Storage Storage Conditions / Shelf Life Store in original, unopened and undamaged, in dry conditions at temperature between +10oC and 35oC. A shelf life of 12 months from the date of production is achieved when stored in accordance with the above recommendations.  

Technical Data

  • Chemical Base One component, moisture triggered synthetic rubber
  • Solid Content ~ 67% by weight (+23oC / 50% r.h.)  

System Information System Structure Consumption  

Build-up

Minimum of two coats at >/= 750ml / m2 applied, with second coat at 900 to the first coat

Wet Film Build

~ 0.75mm per coat

Dry Film Thickness

For 1.0mm DFT (minimum)

*) consumption figures are theoretical and do not allow for any additional material due to surface porosity, surface profile, variations in level and wastage etc.  

Priming  

Substrate

Primer

Overcoat time

Normal

Normally not required *)

N/A

Non-porous

SikaTite Non-Porous Primer

30 minutes

note: times are based upon ambient / substrate temperature and relative humidity of 18oC & 50%  

Application Conditions / Limits

  • Substrate Temperature min. +10oC; max. 35oC
  • Ambient Temperature min. +10oC; max. 35oC
  • Ambient Humidity max. 85% r.h.
Dew Point Beware of condensation! The substrate and uncured membrane temperature must be at least 3oC above the dew point to reduce the risk of condensation or blooming on the membrane finish.  

Application Instructions /  Application Method  

SikaTite UnderTile Rapid can be easily applied by brush or roller. Care is to be taken to ensure that minimum material consumption is met per the Consumption table.

Floor Wall Joints

Joints must be treated either using SikaTite ElastoJoint bandage using SikaSil Pro, or other Sika neutral cure silicon. If SikaSil is used it must be left for minimum 24 hours at 180 C before it can be overcoated with SikaTite UnderTile membrane.

Terminations

Where a terminating sealant is required, such as around windows, Sikaflex Clear should be used.  

Application Tools

  • By brush: with a soft bristle brush
  • By roller: with a solvent resistant, non-shedding synthetic nylon roller

Cleaning of Tools

Clean all tolls and application equipment with water and detergent immediately after use. Hardened and/or cured material can only be removed mechanically  

Curing Details

Overcoating Window Time*

  • Overcoat, 1 hour
  • Tile, 5 hours

*~23oC / 50% r.h. ** recommended for use with CTA tiling adhesives  

Notes on Application / Limitations

SikaTite Non-Porous Primer should be used on metal substrates SikaTite Elastojoint bandages, corners, and tap flanges recommended for detailing Not to be used on substrates with rising damp Contact Sika Technical Support team for further advice as required   


 

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