SikaSeal®-178
Acrylic sealant with very low VOC emission for bridging interior wall cracks
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SikaSeal®-178 is a water-based acrylic sealant. It is used for bridging cracks on interior walls.
- Can be painted with most waterborne paints
- Easy to apply, tool and clean
- Low stress on substrate due to plastic behaviour of the sealant
- Very low VOC emissions
- Good adhesion to many construction materials
- Transportable at −10 °C (max. 24 hours)
Uso
The Product is used for sealing the following types of joints:- Connection joints
- Window frames, door frames, and windowsills
- Joints between walls and ceiling
- Holes and cracks in walls
- Concrete
- Bricks
- Plastered surfaces
- Plasterboards
Ventajas
- Can be painted with most waterborne paints
- Easy to apply, tool and clean
- Low stress on substrate due to plastic behaviour of the sealant
- Very low VOC emissions
- Good adhesion to many construction materials
- Transportable at −10 °C (max. 24 hours)
Packaging
300 ml cartridges
Refer to the current price list for available packaging variations.
Color
Available in a range of colours, refer to the price list for further information.
Detalle de producto
INFORMACIÓN AMBIENTAL
VOC emission classification GEV Emicode EC1plus
CERTIFICADOS / NORMAS
CE marking and declaration of performance based on EN 15651-1:2012 Sealants for non-structural use in joints in buildings and pedestrian walkways — Part 1: Sealants for facade elements
Declaración de Producto
EN 15651-1:2012 | F INT |
Base Química
Acrylic dispersion
Vida Útil
18 months from date of production
Condiciones de Almacenamiento
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.
The Product can be exposed once to a temperature of -10 °C for a maximum period of 24 hours. Before use test the Product to confirm suitability.
Refer to the current Safety Data Sheet for information on safe handling and storage.
Densidad
1.60 kg/l | (ISO 1183-1) |
Dureza Shore A
50 (after 28 days) | (ISO 868) |
Temperatura de Servicio
Maximum | +70 °C |
Minimum | -25 °C |
Aplicación
Tixotropía
20 mm profile at +23 °C | < 1 mm |
Temperatura del Producto
Maximum | +35 °C |
Minimum | +5 °C |
Temperatura del Ambiente
Maximum | +35 °C |
Minimum | +5 °C |
Temperatura del Sustrato
Maximum | +35 °C |
Minimum | +5 °C |
Beware of condensation. Substrate temperature during application must be at least +3 °C above dew point.
Velocidad de Curado
+23 °C at 50 % r.h. | 4 mm per 24 hours |
Tiempo de Formación de Piel
+23 °C at 50 % r.h. | 30 minutes |
CALIDAD DEL SUSTRATO
The Product must not be used on the following substrates:
-
Bitumen, natural rubber or EPDM
-
XPS and EPS insulation boards
-
Corrosion sensitive metals such as iron and steel
On the following substrates, the Product may exhibit poor adhesion:
-
Polyethylene (PE)
-
Polypropylene (PP)
-
PTFE (Teflon®)
Perform a preliminary adhesion test on the above substrates before full application.
Contact Sika Technical Services for additional information.
PREPARACIÓN DEL SUSTRATO
Substrate testing
Note: Adhesion tests on project specific substrates must be performed and procedures agreed with all parties before full project application. For more detailed advice and instructions contact Sika Technical Services.
The substrate must be sound, clean, dry and free of contaminants such as dirt, oil, grease, cement laitance, sealant residues and poorly bonded coatings which could affect adhesion of the primer and sealant.
The substrate must be of sufficient strength to cope with the stresses induced by the sealant during movement.
- Use techniques such as wire brushing, grinding, grit blasting or other suitable mechanical tools to remove all weak substrate material.
- Repair all damaged joint edges with suitable Sika repair products.
- Remove all dust, loose and friable material from all surfaces before application of the sealant.
For more details of the primer or pre-treatment products refer to the individual Product Data Sheet. Contact Sika Technical Services for additional information.
APLICACIÓN
IMPORTANT
Strictly follow installation procedures
Strictly follow installation procedures as defined in Method Statements, application manuals and working instructions which must always be adjusted to the actual site conditions.
IMPORTANT
Environmental conditions during application and cure
Changes in the environmental conditions can affect product performance. Skin formation and drying time can be significantly delayed by high humidity, low temperature and large joint dimensions.
- Protect the Product from leaching, do not expose to water until a solid skin has formed
- Apply masking tape where neat or exact joint lines are required.
- Open the seal on the top of the cartridge, or open the end of the foil pack. Fit the nozzle and cut it to the desired size. Insert the product into the caulking gun.
- Apply the Product into the joint ensuring that it comes into full contact with the sides of the joint and avoiding any air entrapment.
- IMPORTANT Do not use tooling products containing solvents. As soon as possible after application, tool the sealant firmly against the joint sides to ensure adequate adhesion and a smooth finish. Use a compatible tooling agent such as clean water to smooth the joint surface.
- Remove the tape within the skinning time of the Product after finishing.
OVER-PAINTING THE SEALANT
IMPORTANT
Tacky paint over the sealant
Some paint systems may exhibit plasticiser migration that will cause the painted surface to be tacky.
- Trial the paint system with the Product prior to undertaking the project.
The Product can be over-painted with most conventional paint coating systems. Prior to application test the paint system for compatibility.
- Allow the Product to fully cure before over-painting.
- Carry out preliminary trials to test the paint for compatibility in accordance with ISO/TR 20436:2017 - Buildings and civil engineering works — Sealants — Paintability and paint compatibility of sealants
The use of non-flexible paint systems may lead to cracking of the paint coating depending on the movement of the joint.
Colour variation
Note: Colour variations may occur due to the exposure in service to chemicals, high temperatures or UV-radiation, especially with white colour shade. This effect is aesthetic and does not adversely influence the technical performance or durability of the product.
LIMPIEZA DE HERRAMIENTAS
Clean all tools and application equipment with water immediately after use. Hardened material can only be removed mechanically.