Sikaflex®-555
Isocyanate-free windshield and high-strength assembly adhesive
Sikaflex®-555 is a cold-applied, isocyanate and solvent-free windshield and assembly adhesive. It meets the standards for original factory glazing and aftermarket applications. Sikaflex®-555 is based on Sika's Silane Terminated Polymer (STP) technology that cures on exposure to atmospheric humidity.
- Solvent- and Isocyanate-free
- Meets Automotive OEM specifications
- Black-primerless application
- Cold applied
- Easy to apply with any standard piston-type cartridge gun
PRODUCT BENEFITS
- Solvent- and Isocyanate-free
- Meets Automotive OEM specifications
- Black-primerless application
- Cold applied
- Easy to apply with any standard piston-type cartridge gun
Usage
Sikaflex®-555 is suitable for vehicle glass bonding, industrial assembly applications and auto glass replacement. Suitable substrate materials are metals, particularly aluminum, metal primers, paint coatings, sheet steel, ceramic materials and plastics. Seek manufacturer’s advice and perform tests on original substrates before using Sikaflex®-555 on materials prone to stress cracking. This product is suitable for professional experienced users only. Tests with actual substrates and conditions have to be performed ensuring adhesion and material compatibility.Packaging
| Cartridge | 300 ml |
| Unipack | 400 ml 600 ml |
| Pail | 23 l |
| Drum | 195 l |
Product Details
| Chemical base | Silane Terminated Polymer | |
| Colour (CQP001-1) | Black | |
| Cure mechanism | Moisture-curing | |
| Density (uncured) | 1.2 kg/l | |
| Non-sag properties | Good | |
| Application temperature | 5 ─ 40 °C | |
| Open time (CQP526-1) | 10 minutes A | |
| Curing speed (CQP049-1) | see diagram | |
| Shrinkage (CQP014-1) | 2 % | |
| Shore A hardness (CQP023-1 / ISO 48-4) | 50 | |
| Tensile strength (CQP036-1 / ISO 527) | 5 MPa | |
| Elongation at break (CQP036-1 / ISO 527) | 300 % | |
| Tear propagation resistance (CQP045-1 / ISO 34) | 10 N/mm | |
| Tensile lap-shear strength (CQP046-1 / ISO 4587) | 3.5 MPa | |
| Minimum Drive Away Time (cars) according FMVSS 212 (CQP511-1) | with airbags without airbags | 6 hours A, B 2 hours A, B |
| Service temperature (CQP509-1 / CQP513-1) | -40 ─ 90 °C | |
| Shelf life | cartridge, unipack | 9 months C |
| CQP = Corporate Quality Procedure | A) 23 °C / 50 % r. h. | B) details about MDAT contact Sika | C) stored below 25 °C |
CURE MECHANISM
Sikaflex®-555 cures by reaction with atmospheric moisture. At low temperatures the water content of the air is generally lower and the curing reaction proceeds somewhat slower (see diagram 1).
Diagram 1: Curing speed Sikaflex®-555
CHEMICAL RESISTANCE
Sikaflex®-555 is generally resistant to fresh water, seawater, diluted acids and diluted caustic solutions; temporarily resistant to fuels, mineral oils, vegetable and animal fats and oils; not resistant to organic acids, glycolic alcohol, concentrated mineral acids and caustic solutions or solvents.
Application
Surface Preparation
Surfaces must be clean, dry and free from grease, oil, dust and contaminants.
Surface treatment depends on the specific nature of the substrates and is crucial for a long lasting bond. Suggestions for surface preparation may be found on the current edition of the appropriate Sika® Pre-treatment Chart. Consider that these suggestions are based on experience and have in any case to be verified by tests on original substrates.
Windshields without ceramic coatings need proper UV protection.
Application
Sikaflex®-555 can be processed between 5 °C and 40 °C (climate and product) but changes in reactivity and application properties have to be considered. The optimum temperature for substrate and sealant is between 15 °C and 25 °C.
Consider that the viscosity will increase at low temperature. For easy application, condition the adhesive at ambient temperature prior to use.
To ensure a uniform thickness of the bondline it is recommended to apply the adhesive in form of a triangular bead (see figure 1).
Figure 1: Recommended bead configuration
Sikaflex®-555 can be processed with manual, pneumatic or electric driven piston guns as well as pump equipment.
The open time is significantly shorter in hot and humid climate. The glass must always be installed within the open time. Never install a glass after the adhesive has built a skin.
For advice on selecting and setting up a suitable pump system, contact the System Engineering Department of Sika Industry.
Tooling and finishing
Tooling and finishing must be carried out within the skin time of the product. It is recommended using Sika® Tooling Agent N. Other finishing agents must be tested for suitability and compatibility prior the use.
Removal
Uncured Sikaflex®-555 may be removed from tools and equipment with Sika® Remover-208 or another suitable solvent. Once cured, the material can only be removed mechanically.
Hands and exposed skin have to be washed immediately using hand wipes such as Sika® Cleaner-350H cleaning towels or a suitable industrial hand cleaner and water.
Do not use solvents on skin.