Sikalastic®-702
Elastic polyurea hybrid liquid applied membrane for roof waterproofing
Sikalastic®-702 is a 2-part, elastic, hybrid 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: 20.1 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
Light 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/Sikalastic®-701 SF. 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 PU/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)
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
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 N |
Bituminous coatings | Sikalastic® Metal Primer N |
Metals & Ferrous or galvanised metals, lead, copper, aluminium, brass or stainless steel | Sikalastic® Metal Primer N |
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
Resistance to Root Penetration
Root resistant
Tensile Strength
~10.0 N/mm2
Tensile Adhesion Strength
~2.5 N/mm2
Value measured using Sika® Concrete Primer LO
Tear Strength
~13.8 N/mm2
Chemical Resistance
Resistant to many chemical based cleaners. Contact Sika Technical Services for additional information.
External Fire Performance
Broof T1 / Broof T4 | (ENV 1187) |
Reaction to Fire
Euroclass E | (EN 13501-1) |
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 % r.h. min / 80 % r.h. 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
The product can be applied on substrates with a moisture content of ≤ 4 % part by weight. The substrate must be visibly dry with no standing water.
The following test methods can be used to determine the substrate moisture content:
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.