Product Data Sheet Show all documents

Sikalastic®-488 (au)

Moisture-curing single-pack elastomeric polyurethane waterproofing membrane

Sikalastic®-488 is a high performance, hand-applied, low VOC, moisture-curing single-pack elastomeric polyurethane waterproofing membrane. Sikalastic®-488 is directly foot-trafficable. Sikalastic®-488 is the base coat membrane used within the SikaRoof® MTC-UV systems.

  • Seamless membrane
  • High resistance to puncture and standing water
  • Quick tack-free surface
  • Low VOC
  • High elongation
  • Class III membrane 
  • Crack bridging capability, no reinforcement needed
  • Elastomeric behaviour
  • Single pack, ready to use
Product Data Sheet Show all documents

Usage

It is designed for diverse waterproofing including:
  • Balconies
  • Terraces
  • Podium decks
  • Plant room floors
  • Inverted roofs
  • Under tile beds
  • Under paver-pad systems
 

Advantages

  • Seamless membrane
  • High resistance to puncture and standing water
  • Quick tack-free surface
  • Low VOC
  • High elongation
  • Class III membrane 
  • Crack bridging capability, no reinforcement needed
  • Elastomeric behaviour
  • Single pack, ready to use

Packaging

15 Litres

Colour

Light Grey

Product Details

Sustainability / Certifications / Approvals

APPROVALS / CERTIFICATES

AS / NZS 4654.1:2012 Waterproofing membranes for

external above-ground (CSIRO approved)
Product Information

Composition

Single-Pack moisture curing Polyurethane

Shelf life

9 months

 

Storage conditions

From date of production if stored properly in original, unopened and undamaged sealed packaging in dry conditions at temperatures between +5°C and +30°C.

Density

1.30-1.35 (g/cm3)

Viscosity

10,000-18000cP @30 RPM

Volatile organic compound (VOC) content

250g/L
Technical Information

Shore A hardness

70 Shore A

Tensile strength

6 MPa

Tear strength

20 kg/cm

Service temperature

-20 to +80 oC

Dry film thickness

SikaRoof® MTC-12 UV 

1.2mm DFT system- 2x coats of 750 micron wet film thickness required 

SikaRoof® MTC-14 UV 

1.4mm DFT system- 2x coats of 870 micron wet film thickness required

SikaRoof® MTC-20 UV

2.0mm DFT system- 3x coats of 830 micron wet film thickness required

Application

Application Information

Relative air humidity

Between 20 and 90%

Substrate temperature

+5 to +35 oC

Substrate moisture content

Up to 5%

Waiting time to overcoating

In normal conditions, Sikalastic®-488 can be recoated with another layer of Sikalastic®-488 after one night and within 2 days. In case of rain or if the recoating interval was exceeded, light abrasion and reactivate this with Sika Thinner C, come back to the substrate by grinding.
Consumption

Consumption

SikaRoof® MTC-12 UV

1.2mm DFT system- 10m2 per 15L pail

SikaRoof® MTC-14 UV

1.4mm DFT system- 8.6m2 per 15L pail

SikaRoof® MTC-20 UV

2.0mm DFT system- 6m2 per 15L pail
Application steps

SUBSTRATE PREPARATION

Surface must be clean, sound, smooth and dust-free as well as oil-free. Please refer to the 'SikaRoof® MTC-UV systems' method statement for further information.

MIXING

Ready-to-use pails. Mix until homogenous.

APPLICATION

  • Sikalastic®-488 can be applied with a brush or a roller to the desired thickness.
  • Apply Sikalastic®-488 (au) at the recommended coverage rates for the specific SikaRoof® MTC-UV system that is being installed. The dry film thickness for each coat is mentioned on this PDS.
  • Allow Sikalastic®-488 (au) to cure for a minimum 16 hours or until tack free before applying the following layer.
  • Do not allow more than 48 hours between coats of Sikalastic®-488 (au) otherwise abrasion and reactivation will be required before proceeding.
  • Sikalastic®-488 can be subject to foot traffic after 24 hours.

CLEANING OF EQUIPMENT

Reusable tools should be cleaned carefully with Sika Thinner C before curing.

 

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