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UV Protection Polyurethane membrane :


Sikalastic-488/488SL

Single-Pack Waterproofing membrane 

Description

Sikalastic -488/488SL is a high performance, hand-applied, low VOC, moisture curing single-pack elastomeric polyurethane waterproofing membrane. Sikalastic - 488/488SL is directly foot-trafficable. 

Uses

It is designed for waterproofing diverse parts of a building including: Balconies Terraces Podium decks Bathrooms and wet areas Plant room floors Inverted roofs Under tile beds 

Characteristics / Advantages

UV resistance Seamless membrane High resistance to puncture and standing water Quick tack-free surface Low VOC High elongation, class III membrane according to AS/NZS 4858 Crack bridging capability, no reinforcement needed Elastomeric behaviour Single pack, ready to use Available in various colours 

Product Data

Appearance / Colours RAL 7004 - Signal Grey

Packaging 15 Litres 

Storage

Storage Conditions / Shelf Life 9 months From date of production if stored properly in original, unopened and undamaged sealed packaging in dry conditions at temperatures between +5oC and +30oC. 

Mechanical / Physical Properties

  • Composition Single-Pack moisture curing Polyurethane
  • Specific Gravity 1.30-1.35 (g/cm3 ) Service Temperature -20 to +80oC
  • Curing Time Cured overnight
  • VOC Content 130g/L
  • Odour Low smell Tensile Strength 6 MPa Elongation 300% Hardness 70 Shore A
  • Angle Tear Strength 20 kg/cm
  • UV Resistance Excellent
  • Re-coating interval Maximum 48 hours after application
  • Recommended substrate temperature +5 to +35oC
  • Recommended substrate moisture Up to 5%
  • Recommended relative humidity Between 20 and 90% 

Application Details

Preparation

Surface must be clean, sound, smooth and dust-free as well as oil-free. A layer of diluted Sikalastic -488/488SL membrane (with 10% Thinner C) can be used as a primer for dry and contaminants-free concrete. In the case of high porosity, it is recommended to use an epoxy primer. Sikafloor-160 epoxy primer in accordance to the current product datasheet. For damp substrates SikaTite Moisture Seal 2K should be used. 

Application

Sikalastic -488/488SL can be applied with a brush or a roller to the desired thickness. 2 coats of 0.5 - 0.6 litres /m2 are required to achieve a dry film thickness of 1 mm. Sikalastic -488/488SL can be subject to light traffic after 24 hours. Sikalastic -488/488SL can be directly trafficable due to its high resistance to puncture and hardness. Vehicle traffic is not permitted on Sikalastic -488/488SL.

Note: Sikalastic 488/488SL performance is not compromised when exposed to UV light, however it may discolour and some chalking of the surface may occur. Sikalastic ExcelTop is recommended as a top coat where these affects are to be prevented. 

Mixing

  • Ready-to-use pails. Mix until homogenous. 
  • Recoating Instructions
  • In normal conditions, Sikalastic -488/488SL can be recoated with another layer of Sikalastic -488/488SL 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. 

Diluting

Sikalastic -488/488SL should only be diluted with Thinner C. Other solvents are not permitted 

Coverage

2 coats of a minimum of 0.5 - 0.6 litres /m2 each are required to achieve a 1 mm dry film thickness 

Clean-up

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

 

 

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