SikaHyflex®-402 Connection
SikaHyflex®-402 Connection is a 1-part, moisture-curing, elastic joint sealant for sealing many types of joint configurations. It has a primerless application and good adhesion to most construction materials. Provides a waterproof seal with good mechanical properties, remains elastic over a wide range of temperatures and is over-paintable. Movement capability ±25 %. Internal and External use.
- Internal and external use
- Movement capability ±25 %
- Over-paintable
- Bubble-free curing
- Good resistance to weathering and ageing
- Good adhesion ot many construction materials
- Suitable for use in most global conditions
- Elastic over a wide range of temperatures
- 1-part ready to use
- Available in many colors
- Waterproof
- Phthalate free formulation
Usage
Sealing joints for:- Movement and connection joints
- Facade elements
- Balconies
- Window and door frames
- Pre-cast elements
- Retaining walls
- Partition walls
- Parapets
Advantages
- Internal and external use
- Movement capability ±25 %
- Over-paintable
- Bubble-free curing
- Good resistance to weathering and ageing
- Good adhesion ot many construction materials
- Suitable for use in most global conditions
- Elastic over a wide range of temperatures
- 1-part ready to use
- Available in many colors
- Waterproof
- Phthalate free formulation
Packaging
290 ml cartridges, 12 cartridges per box
600 ml cylindrical foil pack, 20 foil packs per box
Colour
Colour range to be defined by local sales organization.
Other colours on request.
Product Details
ENVIRONMENTAL INFORMATION
- Conformity with LEED v4 EQc 2: Low-Emitting Materials
- VOC emission classification GEV-Emicode EC1PLUS
- VOC emission classification of building materials RTS M1
APPROVALS / STANDARDS
- CE Marking and Declaration of Performance to EN 1565-1 - Sealants for non-structural use in joints - Facade elements
- EN ISO 11600: Building construction - Jointing products - Classification and requirements for sealants.
Chemical Base
Silane terminated polymer
Shelf Life
12 months from the date of production
Storage Conditions
The product must be stored in original, unopened and undamaged sealed packaging in dry conditions at temperatures between +5 °C and +25 °C. Always refer to packaging.
Density
~1,25 kg/l | (ISO 1183-1) |
Product Declaration
- EN 1565-1: F EXT-INT CC 25 LM
- EN ISO 11600: F 25 LM
Shore A Hardness
~20 (after 28 days) | (ISO 868) |
Secant Tensile Modulus
~0,40 N/mm2 at 100 % elongation (23 °C) | (ISO 8339) |
~0,50 N/mm2 at 100 % elongation (-20 °C) |
Elastic Recovery
~70 % | (ISO 37) |
Tear Propagation Resistance
~4,0 N/mm | (ISO 34) |
Movement Capability
±25 % | (ISO 9047) |
Resistance to Weathering
8 | (ISO / DIS 19862) |
Service Temperature
−40 °C to +70 °C
Joint Design
The joint width must be designed to suit 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.
Standard joint widths for joints between concrete elements
Joint distance [m] | Min. joint width [mm] | Min. joint depth [mm] |
2 | 10 | 10 |
4 | 15 | 10 |
6 | 20 | 10 |
8 | 30 | 15 |
10 | 35 | 17 |
All joints must be correctly designed and dimensioned in accordance with the relevant standards and codes of practice. The basis for calculation of the necessary joint widths are the type of structure, dimensions, technical values of the adjacent building materials, joint sealing material, and the specific exposure of the building and the joints.
For larger joints contact Sika Technical Services for additional information.
Application
Backing Material
Use closed cell, polyethylene foam backing rods.
Sag Flow
0 mm (20 mm profile, 50 °C) | (ISO 7390) |
Ambient Air Temperature
+5 °C to +40 °C
Substrate Temperature
+5 °C to +40 °C | ≥ 3 °C above dew point temperature |
Curing Rate
~2 mm/24 hours (23 °C / 50 % r.h.) | Sika Corporate Quality Procedure |
Skin Time
~60 minutes (23 °C / 50 % r.h.) | (CQP 019-1) |
Tooling Time
~50 minutes (23 °C / 50 % r.h.) | (CQP 019-2) |
Consumption
Joint width [mm] | Joint depth [mm] | Joint length [m] per 600 ml foil pack |
8 | 8 | 12 |
15 | 8 | 6 |
20 | 10 | 3 |
25 | 12 | 2 |
30 | 15 | 1.3 |
SUBSTRATE PREPARATION
The substrate must be sound, clean, dry and free of all contaminants such as dirt, oil, grease, cement laitance, old sealants and poorly bonded coatings which could affect adhesion of the sealant.
The substrate should be of sufficient strength to cope with the stresses induced by the sealant during movement.
Removal techniques such as wire brushing, grinding, grit blasting or other suitable mechanical tools can be used.
All dust, loose and friable material must be completely removed from all surfaces before application of any activators, primers or sealant. Where joints in substrate are saw cut. After sawing, all slurry material must be flushed away and joint surfaces allowed to dry.
SikaHyflex®-402 Connection adheres without primers and/or activators.
For optimum adhesion, joint durability and critical, high performance applications such as joints on multi-storey buildings, highly stressed joints, extreme weather exposure. The following priming and/or pre-treatment procedures shall be followed:
Non-porous substrates
Aluminium, anodised aluminium, stainless steel, PVC, galvanised steel, powder coated metals or glazed tiles. Slightly roughen surface with a fine abrasive pad. Clean and pre-treat using Sika® Aktivator-205 applied with a clean cloth.
Before sealing, allow a waiting time of > 15 minutes (< 6 hours).
Other metals, such as copper, brass and titanium-zinc, cleaned and pre-treat using Sika® Aktivator-205 applied with a clean cloth. After a waiting time of > 15 minutes (< 6 hours). Apply Sika® Primer-3 N applied by brush. Allow a further waiting time of > 30 minutes (< 8 hours) before sealing.
Porous substrates
Concrete, aerated concrete and cement based renders, mortars and bricks. Prime surface using Sika® Primer-3 N applied by brush.
Before sealing, allow a waiting time of > 30 minutes (< 8 hours).
For more detailed advice contact Sika Technical Services for additional information.
Note: Primers are adhesion promoters and not an alternative to improve poor preparation / cleaning of the joint surface. Primers also improve the long term adhesion performance of the sealed joint.
CLEANING OF TOOLS
Clean all tools and application equipment immediately after use with Sika® Remover-208. Once cured, hardened material can only be removed mechanically.
For cleaning skin use Sika® Cleaning Wipes-100.