Sikaflex-296 Glass Bonding
At a glance
- 1-component glass bonding
- PVC and solvent free
- Wheelmark-approved
Product description
Sikaflex-296 is an elastic one-component polyurethane windscreen adhesive with excellent gap-filling properties. This professional adhesive has been specially developed for almost all mineral glazing applications in the marine industry and cures by reacting with moisture in the air. It complies with the stringent international marine regulations of the International Maritime Organization (IMO) and is Wheelmark certified.
Benefits of Sikaflex-296 Glass Bonding
- Suitable for bonding glass in marine applications.
- Resistant to weathering and ageing.
- Very good workability.
- Low odour and solvent-free.
- Suitable for manual and machine application.
- Can be applied without a black primer.
- Wheelmark-certified.
Directions for use
Sikaflex-296 can be applied at temperatures between 10°C and 35°C (for both the ambient temperature and the product temperature). However, changes in curing behaviour and application properties should be taken into account. The optimum temperature for both the substrate and the adhesive is between 15°C and 25°C. Please note that the viscosity increases at lower temperatures. For easier application, allow the adhesive to reach ambient temperature before use.
Specifications
Packaging: 600 ml
Colour: black
Chemical base: 1-component polyurethane
Cure mechanism: moisture-curing
Specific gravity: 1.2 kg/L
Non-sag properties: very good
Application temperature: 10 °C to 35 °C
Skin time: 45 minutes
Open time: 30 minutes
Hardness: Shore A 45
Tensile strength: 6 MPa
Elongation at break: 450 %
Temperature resistance: -40 °C to + 90°C
Shelf life: 9 months
Application gun: cartridge sealant gun
Product properties
The key technical properties clearly listed in one place.
- Article number
- LIJ001967
-
The recommended application temperature range indicates the conditions under which the product can generally be applied and cured properly. Three temperatures matter:
- Air: the temperature in the workshop or outdoors.
- Substrate: the temperature of the surface being treated.
- Product: the temperature of the resin, adhesive or coating itself.
A cold substrate can cause condensation and affect adhesion. At higher temperatures, two-component products may react faster, reducing their working time. Check the dew point and follow the product instructions.
- 10-35 °C
-
The chemical base describes the chemistry of an adhesive, sealant, resin or coating, such as epoxy, polyester, polyurethane, (methyl)methacrylate or a hybrid polymer. It affects curing, flexibility and adhesion. Products with the same chemical base are not necessarily suitable for the same applications.
- One-component polyurethane (PU)
-
Density describes the mass of a material per unit volume. Values may be given in g/cm³, kg/L or kg/m³; 1 g/cm³ equals 1 kg/L. For example, one litre of a liquid with a density of 1.2 kg/L weighs approximately 1.2 kg. Density helps convert between weight and volume, but it can vary with temperature.
- 1.2 kg/L
-
Hardness describes a material's resistance to indentation. For silicone rubber and other elastomers, the Shore A scale is commonly used: Shore A 15, for example, is softer than Shore A 40. Harder plastics may be rated on the Shore D scale. The number belongs to its Shore scale and is not a unit like MPa; values on different scales cannot be directly compared.
- Shore A 45
-
The period for which an unopened product remains usable under the specified storage conditions. Check whether the period starts from the manufacturing date or another date. Shelf life may be shorter after opening, especially for products sensitive to air or moisture.
- 9 months
-
The time after application during which a skin forms on the surface of a sealant. Tool the joint before the skin develops, as adjusting it afterwards can affect the finish or adhesion. Temperature and humidity influence this time.
- 45 minutes
-
Open time is the period during which an applied adhesive, sealant or mortar can still be assembled, positioned or adjusted. It is usually given in minutes under specified conditions, often around 20 or 23 °C. Open time generally starts at application and may differ from the working time after mixing.
- 30 minutes
-
Elongation at break indicates how much a material can stretch during a tensile test before it breaks. It is expressed as a percentage (%) of the original length. At 100% elongation, the material has doubled in length just before breaking. A high value indicates a high ability to deform, but not how much force is needed.
- 450%
-
Sag resistance describes how well a paste, sealant or coating stays in place after application without running or slumping. It matters on vertical surfaces, in thick adhesive joints and for overhead repairs.
A product may be thixotropic: it becomes easier to work when stirred or spread, then thickens again at rest. This makes application easier without the material immediately running down the surface. Sag resistance is not the same as viscosity; behaviour after application also matters.
- Very good
-
Tensile strength is the maximum tensile stress a material can withstand during a tensile test before failure. It is usually expressed in MPa (megapascals) or N/mm² (newtons per square millimetre); 1 MPa = 1 N/mm². Under comparable test conditions, a higher value means greater resistance to tension. In composites, fibre orientation also affects the result.
- 6 MPa
-
The curing mechanism explains how a product develops its final strength or shape. The main mechanisms are:
- Two-component reaction (2K): a chemical reaction begins once components A and B are mixed. Mixing ratio and working time are important.
- Moisture curing (often 1K): the product reacts with moisture in the surrounding air. Temperature, humidity and film thickness affect the process.
- UV curing: light of the appropriate wavelength triggers the reaction. Areas that are not exposed to the light may not cure fully.
- Physical drying: water or solvent evaporates. This is different from chemical curing.
Some products use more than one mechanism, so the correct application conditions depend on the particular system.
- Moisture-curing
- Net contents
- 600 ml
-
Heat resistance describes the temperature a material can withstand after correct processing and curing, usually expressed in degrees Celsius (°C). Continuous exposure is different from a brief temperature peak, and mechanical loading may also affect the limit. Heat resistance is not the same as the temperature at which the product can be applied.
- -40 to 90 °C