UsageSikaHyflex®-140 Construction is designed for movement and connection joints in concrete facades as well as other construction sealing applications.
- Movement capability of ±25 % (ASTM C 719)
- Bubble-free curing
- Good workability
- Good adhesion to many substrates
600 ml foil pack, 20 foil packs per box
Colour range to be defined by local sales organization.
- EMICODE EC1 PLUS R
- LEED v2009 IEQc 4.1: Low-Emitting Materials - Adhesives and Sealants
APPROVALS / CERTIFICATES
- ASTM C 920, class 25
i-Cure® Technology polyurethane
SikaHyflex®-140 Construction has a shelf life of 12 months from the date of production, if it is stored in undamaged, original, sealed packaging, and if the storage conditions are met.
SikaHyflex®-140 Construction shall be stored in dry conditions, where it is protected from direct sunlight and at temperatures between +5 °C and +25 °C.
|~1,45 kg/l|| |
Shore A hardness
|~36 (after 28 days)|| |
Secant tensile modulus
|~0.30 N/mm2 at 60% elongation (23 °C)|
Tear propagation resistance
|~6,0 N/mm|| |
|± 25 %||(ASTM C 719)|
−40 °C min. / +70 °C max.
The joint width must be designed to suit the joint movement required and the movement capability of the sealant. The joint width shall be ≥ 10 mm and ≤ 35 mm. A width to depth ratio of 2:1 must be maintained (for exceptions, see table below).
Standard joint widths for joints between concrete elements
|Joint distance [m]|
Min. joint width [mm]
Min. joint depth [mm]
All joints must be properly designed and dimensioned in accordance with the relevant standards, before construction. Basis for calculation of the necessary joint width are the technical values of the joint sealant and the adjacent building materials, as well as the exposure of the building, type of construction and its dimensions.
For larger joints please contact Sika Technical Service.
Use closed cell, polyethylene foam backing rods.
~2 mm (20 mm profile, 50 °C)
Ambient air temperature
+5 °C min. / +40 °C max.
+5 °C min. / +40 °C max., min. 3 °C above dew point temperature
~2 mm/24 hours (23 °C / 50 % r.h.)
~120 minutes (23 °C / 50 % r.h.)
~100 minutes (23 °C / 50 % r.h.)
Joint width [mm]
Joint depth [mm]
Joint length [m] per 600 ml foil pack
The substrate must be clean, dry, sound and homogeneous, free from oils, grease, dust and loose or friable particles. SikaHyflex®-140 Construction adheres without primers and/or activators. However, for optimum adhesion and critical, high performance applications, such as on multi-story buildings, highly stressed joints, extreme weather exposure or water immersion, the following priming and/or pre-treatment procedures shall be followed:
Non-porous substratesAluminium, anodised aluminium, stainless steel, galvanised steel, powder coated metals or glazed tiles have to be cleaned and pre-treated using Sika® Aktivator-205, wiped on with a clean towel. Before sealing, allow a flash-off time of > 15 minutes (< 6 hours).Other metals, such as copper, brass and titanium-zinc, also have to be cleaned and pre-treated using Sika® Aktivator-205,wiped on with a clean towel. After the necessary flash-off time, use a brush to apply Sika® Primer-3 N and allow a further flash-off time of > 30 minutes (< 8 hours) before sealing the joints.PVC has to be cleaned and pre-treated using Sika® Primer-215 applied with a brush. Before sealing, allow a flash-off time of > 30 minutes (< 8 hours).
Porous substratesConcrete, aerated concrete and cement based renders, mortars and bricks shall be primed using Sika® Primer-3 N applied with a brush. Before sealing, allow a flash-off time of > 30 minutes (< 8 hours).
For more detailed advice and instructions please contact the local Sika Technical Services Department.
Note: Primers are adhesion promoters. They are neither a substitute for the correct cleaning of a surface, nor do they improve the strength of the surface significantly.
CLEANING OF EQUIPMENT
Clean all tools and application equipment immediately after use with Sika® Remover-208. Once cured, resi- dual material can only be removed mechanically. For cleaning skin use Sika® Cleaning Wipes-100.