Sikalastic®-702 THX
Liquid 2-component, cold applied, thixotropic, elastic polyurea hybrid for detailing liquid applied membrane roofing/waterproofing
Sikalastic®-702 THX is a two componant, elastic, thixotropic, hand applied, polyurea based liquid membrane for roofing/waterproofing detail work.
- Seamless finish
- Easily detailed around complex geometries
- Cold applied - requires no heat or flame
- Horizontal and vertical one-layer application
- High elasticity and elongation at break
- Reinforced or unreinforced systems, as required
- Applied by brush, roller or trowel
- Good adhesion to many substrates with the appropriate primers
- Resistant to ponding water
Usage
The product can be used for the following roof or deck waterproofing applications:- Horizontal and vertical detailing around penetrations, drains, roof lights, parapets and complex geometries
- Aluminium
- Fibre cement
- Cementitious
- Concrete
- Concrete slabs
- Bitumen sheet membranes
- Bituminous coatings
- Bricks
- Galvanised steel
- Lead
- Metal
- Stainless steel
- If used in areas exposed to permanent UV-light, the Product must be overcoated with UV resistant top coat of Sikalastic® 701SF
Advantages
- Seamless finish
- Easily detailed around complex geometries
- Cold applied - requires no heat or flame
- Horizontal and vertical one-layer application
- High elasticity and elongation at break
- Reinforced or unreinforced systems, as required
- Applied by brush, roller or trowel
- Good adhesion to many substrates with the appropriate primers
- Resistant to ponding water
Packaging
| Part A | .47 gal (1.8 L) |
| Part B | 1.53 gal (6.3 L) |
| Part A + B | 2 gal (8.0 L) |
Colour
Dark Grey
Product Details
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 +41°F (+5°C) and +86°F (+30°C). Always refer to packaging.
Density
| ~1,26 kg/l (Mixed A+B) | (DIN EN ISO 2811-11) |
Volatile organic compound (VOC) content
3.66 g/L
Solid content by mass
~100 % (Part A+B)
Solid content by volume
~100 % (Part A+B)
System Structure
System
- Substrate
- Primer
- Sikalastic®-702 THX
- UV Protection - Sikalastic® 701SF
| Substrate | Primer |
| Cementitious substrates | Sika® Concrete Primer lightly broadcast with quartz sand, 0,3–0,8 mm |
| Concrete slabs | Sika® Concrete Primer lightly broadcast with quartz sand, 0,3–0,8 mm |
| Bitumen sheet membrane | Sikalastic® EP Primer/Sealer |
| Bituminous coatings | Sikalastic® EP Primer/Sealer |
| Aluminium, Brass, Copper, Galvanised steel, Lead, Metal, Stainless steel, Untreated steel | Sikalastic® EP Primer/Sealer |
Other substrates or primers must be tested for their compatibility.
If in doubt, apply a test area first.
Testing
| 75 | (BS ISO 7619) |
Tensile Strength
| 7,0 N/mm2 | (DIN EN ISO 527-3) |
Tensile Adhesion Strength
| ~2,5 N/mm2 | (DIN EN ISO 4624) |
Value measured over Sika® Concrete Primer LO (UK) applied to concrete.
Chemical Resistance
Resistant to many chemicals. Contact Sika Technical Services for additional information.
Behavior after Artificial Weathering
- Limited resistance to UV-induced degradation (7 days)
- Additional color stability from UV exposure can be achieved by application of a Top coat: Sikalastic®-701SF
Dry film thickness
40 mils (dft). Multiple layer application is possible.
Application
Mixing Ratio
Part A:Part B = 1:1,78 (by weight)
Ambient Air Temperature
35.6°F (+2°C) min. / 104°F (+40°C) max.
Relative Air Humidity
35 % min. / 80 % max.
Dew Point
Beware of condensation. The substrate and uncured applied membrane must be at least 35.6°F(+2°C) and 5°F above the dew point (air and substrate) to reduce risk of condensation or blooming on the membrane finish.
Substrate Temperature
35.6°F (+2°C) min. / 140°F (+40°C) max.
Substrate Moisture Content
Can be applied on substrates with a moisture content of ≤ 4 %. 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
Pot Life
~35 minutes at +68°F (+20°C)
Note:Pot life will decrease at higher temperatures and increase at lower temperatures.
Tack Free Time
~3 hours at 68°F (+20°C)
Note:Time is approximate and will be affected by changing ambient conditions particularly temperature and relative humidity.
Test Results
| Temperature | Relative Humidity | Rain Resistant | Foot Traffic/Overcoating | Full Cure |
| +10 °C | 50 % | ~2 hours | ~8 hours | ~28 hours |
| +20 °C | 50 % | ~1 hours | ~5 hours | ~24 hours |
| +30 °C | 50 % | ~1 hours | ~4 hours | ~20 hours |
Coverage
~1,0 kg/m2 for 0,8 mm DFT
This figure is theoretical and does not allow for any additional material due to surface porosity, surface profile, variations in level, wastage or any other variations. Apply product to a test area to calculate the exact consumption for the specific substrate conditions and proposed application equipment.
SUBSTRATE QUALITY
- 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
- Suitable substrates: Concrete Slabs, Concrete, Cementitious, Metals, Asphaltic BUR's, bituminous felts and coatings, brickwork, asbestos cement
- All existing surfaces must be sound, well addered and/or completely attached to stucture.
- All deleterious materials must be removed and replaced with like in kind
SUBSTRATE PREPARATION
IMPORTANT
The supporting structure must be of sufficient structural strength to support the new and existing layers of the roof build-up. The complete roof system including existing layers must be designed and secured against wind uplift loadings.
MIXING
IMPORTANT Do not dilute.
MIXING PROCEDURE
1. Mix Part A (resin) with a mechanical mixer (Jiffy) at slow speed until the colored pigment is dispersed and a uniform color is achieved.
2. Add Part B (hardener) to Part A.
3. Using a mechanical mixer (Jiffy) at slow speed, mix Part A + B continuously for ~3 minutes until a uniformly colored mix is achieved. IMPORTANT Do not mix excessively.
4. During the final mixing stage, scrape down the sides and bottom of the mixing container with a flat or straight edge trowel at least once to ensure complete mixing
APPLICATION
Detailing
Sloped & Vertical Surfaces
Apply Sikalastic 702 THX as the base resin.
Non-Structural Cracks Up To 1/16''
Detail application not necessary. Apply embedment/base resin layer per instruction.
Non-Structural Cracks Between 1/16'' and 1/4''
Rout and seal with Sikaflex® sealant. Apply 3'' Sika® Joint Tape SA centered over the crack. Apply embedment/base resin layer per instruction.
Cracks and Joints Between 1/4" and 1'' and Above
Consult Sika
Transitions Between Dissimilar Materials Apply
Sika® Joint Tape SA centered over edge or PAREX Synergy Reinforcing Mesh 355 set in a base coat of Sikalastic 702 THX. Apply embedment/base resin layer per instruction
CLEANING OF TOOLS
Clean all tools and application equipment with Thinner C, immediately after use. Hardened material can only be removed mechanically.