Sikalastic®-701
Polyurethane hybrid elastic top coat for liquid applied membrane waterproofing systems
Sikalastic®-701 is a 2-part, polyurethane hybrid, gloss finish top coat for Sika® Liquid Applied Membrane waterproofing systems. Sikalastic®-701 is commonly used in conjunction with SikaRoof® MTC-UV systems and can also be used with Sikalastic® polyurea systems.
- Aliphatic polyurethane providing UV and yellowing resistance
- Good long term weathering performance
- Good colour stability and gloss retention
- Good chemical resistance
- Low soiling and easily cleanable
- Suitable for cool roofs by providing a high Solar Reflective Index
- Resistant to ponding water
Usage
A gloss finish top coat for:- Sika® Liquid Applied Membrane systems
- Sika® 2-C spray applied PU/PUA systems
- Newly applied or renovating existing membranes
- Flat and pitched roof structures
- Communal walkways
- Podium decks
- Terrace roofs
- For exterior use only
Advantages
- Aliphatic polyurethane providing UV and yellowing resistance
- Good long term weathering performance
- Good colour stability and gloss retention
- Good chemical resistance
- Low soiling and easily cleanable
- Suitable for cool roofs by providing a high Solar Reflective Index
- Resistant to ponding water
Packaging
| Part A | 10kg container |
| Part B | 2.5kg container |
| Part A + B | 12.5kg ready to mix unit |
Colour
Light Grey (RAL 7035)
White (RAL 9016)
Product Details
APPROVALS / CERTIFICATES
- CE Marking and Declaration of Performance to European Technical Assessment ETA-20/0248, based on ETAG 005 Part 1 and Part 6 — Liquid applied roof waterproofing kits. Part 1: General. Part 6: Specific stipulations for Kits based on Polyurethane
- Fire Testing EN 13501-1, Sikalastic®-701, Sikalastic®-702, warringtonfire, Report No.19896B
- Abrasion resistance AR0.5(Special), Sikalastic®-701, Sikalastic®-702, FACE, Test report No. FC/18/8048
- AS4654.1:2012 Waterproofing membranes for external above-ground use (BRANZ)
Composition
Elastomeric Polyurethane/Hybrid
Shelf life
24 months from date of production
Storage conditions
Store properly in original, unopened and undamaged packaging, in dry conditions at temperatures between +5 °C and +30 °C. Always refer to packaging.
Density
| ~1.25 kg/l (mixed A+B) | (DIN EN ISO 2811-11) |
Value at +23 °C
Solid content by mass
| Part A | ~67 % |
| Part B | ~100 % |
Solid content by volume
| Part A | ~55 % |
| Part B | ~100 % |
System structure
Sikalastic®-701 can be used with the following:
1-Part PU cold applied Systems
- Sikalastic®-488/SL
- Sikalastic®-888
2-Part PU/PUA hot spray applied Systems
- Sikalastic®-851 R
- Sikalastic®-888
- Sikalastic®-888 Hybrid
Refer to the following System Data Sheets:
- SikaRoof® MTC- UV
Tensile strength
| Temperature | Value |
| +23 °C | ~10 MPa |
| -20 °C | ~20 MPa |
Solar reflectance
| Initial Solar Reflectance | 0,88 |
Thermal emittance
| Initial Thermal Emittance | 0,86 |
Solar reflectance index
| Initial SRI (Convective Coefficient, Medium Wind) | ~112 |
Chemical resistance
Resistant to many chemicals. Contact Sika Technical Service for additional information.
External fire performance
| Broof T1 / Broof T4 | (prEN 1187) |
Reaction to fire
| Euroclass E | (EN 13501-1) |
Dry film thickness
Dry film thickness (DFT): 220 micron
Application
Mixing ratio
Part A : Part B = 80 : 20 (by volume)
Ambient air temperature
+2 °C min. / +40 °C max.
Relative air humidity
| Above +20 °C | 35 % min / 80 % max. |
| Below +20 °C | 45 % min. / 80 % max. |
Dew point
Beware of condensation.
The substrate and uncured applied membrane must be at least +3 °C above dew point to reduce the risk of condensation or blooming on the membrane finish.
Substrate temperature
+2 °C min. / +40 °C max.
Substrate moisture content
Refer to Product Data Sheet of the appropriate base layers
Pot Life
1 hour at +20 °C
Pot life will decrease at higher temperatures and increase at lower temperatures.
Tack free time
| Condition | Property | Value |
| 20 °C / 50 % RH | Tack free time | ~45 minutes |
| 20 °C / 50 % RH | Hard drying time | ~60 minutes |
| 20 °C / 50 % RH | Final drying time | ~90 minutes |
| Condition | Property | Value |
| 5 °C / 50 % RH | Tack free time | ~75 minutes |
| 5 °C / 50 % RH | Hard drying time | ~105 minutes |
| 5 °C / 50 % RH | Final drying time | ~135 minutes |
Times are approximate and will be affected by changing ambient conditions particularly temperature and relative humidity.
Applied product ready for use
| Temperature | Relative Humidity | Rain Resistant | Foot Traffic | Full Cure |
| +10 °C | 50 % | ~75 minutes | ~150 minutes | ~1 day |
| +20 °C | 50 % | ~60 minutes | ~120 minutes | ~1 day |
| +30 °C | 50 % | ~45 minutes | ~90 minutes | ~16 hours |
Times are approximate and will be affected by changing ambient conditions particularly temperature and relative humidity.
Consumption
Wet film thickness (WFT): 280 micron
Approximately 35m2 per 12.5kg pail
Yield
~0.35 kg/m2 applied in a single coat
SUBSTRATE PREPARATION
Confirm waiting /overcoating time has been achieved on the previously applied system base layer. The base layer must be clean, dry and free of all contaminants such as dirt, oil, grease, coatings and loose material. If dust exists on the surface, it must be completely removed before application of the product, preferably by vacuum extraction equipment.
If the maximum overcoating time of the base layer is exceeded, the surface must be lightly abraded using light abrasive manual tools or mechanical equipment to roughen the surface. Depending on the type of base layer, a solvent wipe may also be required. Finally, completely remove all the dust by vacuum extraction equipment.
MIXING
Prior to mixing all parts, mix separately Part A (resin) using an electric single or double paddle mixer and stirrer (300 to 400 rpm) or other suitable equipment. Mix liquid and all the coloured pigment until a uniform colour / mix has been achieved. Add Part B (hardener) to Part A and mix Part A + B continuously for 3,0 minutes until a uniformly coloured mix has been achieved. Mix full units only. Mixing time for A+B = ~3,0 minutes.
APPLICATION
Apply mixed product in 1 coat by roller, brush or spray equipment to achieve a consistent thickness and required surface finish.
CLEANING OF EQUIPMENT
Clean all tools and application equipment with water immediately after use. Hardened material can only be removed mechanically or with a proprietary paint stripper.