Sikalastic®-702
ELASTIC POLYUREA HYBRID LIQUID APPLIED MEMBRANE FOR ROOF WATERPROOFING
Sikalastic®-702 is a 2-part, elastic, polyurea based liquid applied roof waterproofing membrane. It is part of the SikaRoof® PUR liquid applied roofing solutions range of products.
- Cold applied - requires no heat or flame
- One layer application
- High elasticity and elongation at break
- No reinforcement required
- Self-smoothing
- Applied by notched rubber or metal squeegees
- Good adhesion to many substrates with the appropriate primers
- Can be covered with an Aliphatic top coat
- Resistant to ponding water
Usage
Sikalastic®-702 may only be used by experienced professionals. Designed for the following roof waterproofing applications:- Flat fully exposed roof structures
- New construction and refurbishment projects
- Roofs with numerous details such as penetrations, drains, roof lights and complex geometry
- Balcony and terrace decks underneath a protective layer (i.e. ballast, paving slabs, tiles)
- Alternative option for small projects where application machinery is not practical
Advantages
- Cold applied - requires no heat or flame
- One layer application
- High elasticity and elongation at break
- No reinforcement required
- Self-smoothing
- Applied by notched rubber or metal squeegees
- Good adhesion to many substrates with the appropriate primers
- Can be covered with an Aliphatic top coat
- Resistant to ponding water
Packaging
Parts A+B: 20.2 L (25 kg)
| Part A | 4.7 L ( 9.2 kg) |
| Part B | 15.5 L (15.8 kg) |
Refer to current price list for packaging variations
Colour
Dark grey
When product is exposed to direct sunlight (UV), there may be some discolouration.
Additional UV protection can be achieved by application of a topcoat: Sikalastic®-701. This must be applied within 7 days over Sikalastic®-702 otherwise the performance may be affected.
Product Details
APPROVALS / STANDARDS
-
Root Resistance DIN CEN/TS 14416, Sikalastic®-702, kiwa, Test report No. 0078.0.1-2019e
- CE Marking and Declaration of Performance to ETAG 005-1-6:2004, Liquid-applied roof waterproofing using kits based on polyurethane
-
Fire Testing EN 13501-5, Sikalastic®-701, Warringtonfire, Report No. 19895B, 19895C
- Fire Testing EN 13501-1, Sikalastic®-701 Warringtonfire, Report No.19896B
Chemical Base
Elastomeric Aromatic PUA hybrid
Shelf Life
12 months from date of production
Storage Conditions
Product must be stored in original, unopened and undamaged packaging in dry conditions at temperatures between +5 °C and +30 °C. Always refer to packaging.
Density
| ~1.24 kg/L (Mixed A+B) | (DIN EN ISO 2811-11) |
Solid content by weight
~100 % (Part A & B)
Solid content by volume
~100 % (Part A & B)
Volatile organic compound (VOC) content
~0.07 g/L
Overall Thickness
| Application | System | Thickness |
| Buried under tiles, concealed roofs | SikaRoof® PUR-10 | ~1.5 mm |
| Exposed roofs, Economical system | SikaRoof® PUR-15 | ~1.8 mm |
| Exposed roofs, Advanced system | SikaRoof® PUR-18 | ~2.3 mm |
Refer to the System Data Sheet: SikaRoof® PUR Systems
System Structure
System
- Sikalastic®-702
- Refer to the System Data Sheet: SikaRoof® PUR Systems
- Primers
| Substrate | Primer |
| Cementitious substrates | Sika® Concrete Primer LO or Sikafloor®-161 lightly broadcast with quartz sand, 0.3 – 0.8 mm |
| Ceramic tiles (unglazed), and concrete slabs | Sika® Concrete Primer LO |
| Bituminous felt | Sikalastic® Metal Primer |
| Bituminous coatings | Sikalastic® Metal Primer |
| Metals & Ferrous or galvanised metals, lead, copper, aluminium, brass or stainless steel | Sikalastic® Metal Primer |
For the primer consumption rates and waiting time / overcoating, refer to the appropriate Product Data Sheet. Other substrates must be tested for their compatibility. If in doubt, apply a test area first.
Shore A Hardness
| ~75 | (ISO 7619) |
Tensile Strength
| ~10.0 N/mm2 | (DIN EN ISO 527-3) |
Tensile Adhesion Strength
| ~2.5 N/mm2 | (DIN EN ISO 4624) |
Value measured using Sika® Concrete Primer LO
Tear Strength
| ~13.8 N/mm2 | (ISO 6383-2) |
Resistance to Root Penetration
| Root resistant | (DIN CEN/TS 14416) |
External Fire Performance
| Broof T1 / Broof T4 | (ENV 1187) |
Reaction to Fire
| Euroclass E | (EN 13501-1) |
Chemical Resistance
Resistant to many chemical based cleaners. Contact Sika Technical Services for additional information.
Dry film thickness
Refer to the System Data Sheet: SikaRoof® PUR Systems
Application
Mixing Ratio
Part A : Part B = 1 : 1.72 (by weight)
Product Temperature
+10 °C min. / +25 °C max.
Ambient Air Temperature
+2 °C min. / +40 °C max.
Relative Air Humidity
35 % min / 80 % max.
Substrate Temperature
+2 °C min. / +40 °C 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 Moisture Content
≤ 4 % parts by weight.
The following test methods can be used:
- Sika®-Tramex meter
- CM-measurement
- Oven-dry-method. No rising moisture according to ASTM (Polyethylene-sheet).
Pot Life
~25 minutes at +20 °C
Pot life will decrease at higher temperatures and increase at lower temperatures.
Applied Product Ready for Use
| Temperature | Relative Humidity | Rain Resistant | Foot Traffic/Overcoating | Full Cure |
| +10 °C | ~50 % | ~3 hours | ~10 hours | ~28 hours |
| +20 °C | ~50 % | ~2 hours | ~6 hours | ~24 hours |
| +30 °C | ~50 % | ~1 hour | ~4 hours | ~20 hours |
SUBSTRATE PREPARATION
- The supporting structure must be of sufficient structural strength to apply all new and existing layers of the roof build-up. Complete roof system must be designed and secured against wind uplift loadings.
- Refer to the Sika Method Statement: SikaRoof® PUR roof waterproofing systems
- Suitable substrates: Concrete, bituminous felts and coatings, metal, brickwork, asbestos cement, ceramic tiles.
MIXING
Refer to the Sika Method Statement: SikaRoof® PUR roof waterproofing systems
APPLICATION
Strictly follow installation procedures as defined in method statements, application manuals and working instructions which must always be adjusted to the actual site conditions.
Refer to the Sika Method Statement: SikaRoof® PUR roof waterproofing systems
CLEANING OF TOOLS
Clean all tools and application equipment with Thinner C or similar, immediately after use. Hardened material can only be removed mechanically.