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Sikaflex-298 FC
At a glance
- PU adhesive sealant
- Suitable for teak decks
- Rapid skin formation
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Full-surface adhesive for teak decking.
Sikaflex-298 FC is a slightly thixotropic fast-skinning bedding compound for marine applications. This PU adhesive cures into a durable elastomer under the influence of atmospheric moisture. Sikaflex-298 FC is used for bedding or bonding decks made of teak, marine plywood or iroko wood on fibreglass, steel or wood; also for bonding indoor flooring (wood, marble, laminated).
Sikaflex-298 FC meets the regulations set out by the International Maritime Organization (IMO).
Benefits of Sikaflex-298 FC
- Fast skin formation.
- 1-component formulation.
- Slightly thixotropic.
- Dampens noise and vibration.
- Elastic behaviour.
- Contains no flammable solvents.
Applications
Sikaflex-298 FC is suitable for bonding deck covering materials made from synthetic resins (except polyethylene and polypropylene) and for bedding teak plank decking laid on top of the subdeck surface. Suitable substrates include GRP, marine plywood (WBP), steel and aluminium sealed with an anti-corrosion coating (epoxy or polyurethane-acrylic-based) and stainless steel. Please note that higher temperatures and/or higher humidity reduce the skin formation time.
Specifications
Packaging: 600 ml (sausage)
Chemical base: 1-component polyurethane
Colour: black
Cure mechanism: moisture-curing
Non-sag properties: slightly thixotropic
Application temperature: 10-35 °C
Service temperature: -50 °C to +90 °C
Consumption: approx. 1,200 ml/m2
Skin time: 50 minutes
Open time: 45 minutes
Shrinkage: 6%
Hardness: Shore A 25
Tensile strength: 1.2 MPa
Elongation at break: 400%
Shelf life: 12 months (stored at temperatures below 25 °C)
Please refer to the technical documentation for Sikaflex-298 FC for additional technical properties and application instructions.
Product properties
The key technical properties clearly listed in one place.
- Article number
- LIJ001420
-
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)
-
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.
- 12 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.
- 50 minutes
-
Cure shrinkage describes how much a resin, adhesive or rubber becomes smaller as it cures. The value is usually given as a percentage (%) and may refer to volume shrinkage or shrinkage along one dimension; these are not the same. Shrinkage matters for casting accuracy and for limiting stress or distortion.
- 6%
-
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.
- 45 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.
- 400%
-
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.
- Slightly thixotropic
-
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.
- 1.2 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
-
Consumption or coverage describes how much product is needed for a given surface area. Consumption may be stated in g/m² or kg/m², while coverage is often given in m²/L or m²/kg. A consumption of 0.2 kg/m² means a theoretical 200 grams per square metre. Actual use depends on film thickness, substrate absorbency, application method and waste.
- Approximately 1.200 ml/m²
- 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.
- -50 to 90 °C
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