Single-Pack Waterproofing membrane
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.
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
Appearance / Colours RAL 7004 - Signal Grey
Packaging 15 Litres
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%
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.
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.
Ready-to-use pails. Mix until homogenous.
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
Sikalastic -488/488SL should only be diluted with Thinner
C. Other solvents are not permitted
2 coats of a minimum of 0.5 - 0.6 litres /m2 each are
required to achieve a 1 mm dry film thickness
Reusable tools should be cleaned carefully with
Sika Thinner C before curing.