Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Product Type
- Technologies
- Product Families
Features & Benefits
- Ready-to-Use Product Features
- Specific Features
- Long shelf life
- Non-sag
- Excellent tooling characteristics for professional use
- Readily gunnable both at low (+5 °C) and high (+40 °C) temperatures
- Flexible at low (-40 °C) and high temperatures (+150 °C) following cure
- Acetic acid crosslinking system
- Rapid crosslinking: quickly becomes tack-free and crack resistant
- Adheres excellently to glass, vitrified surfaces, ceramic tiles, many plastics and most paints
- Maintains elastic properties at continuous temperatures of up to 250 °C
- Short-term resistance up to 275 °C
Applications & Uses
- Cure Method
- Applications
- Food & High Temperature
- Sealing of connecting and expansion joints exposed to high temperatures
- Sealing of joints exposed to constant temperatures of 250 °C (e.g. industrial ovens and chimney constructions)
- Application Details
Processing
- The substrate areas that will be in contact with the sealant must be clean, dry and free of all loose material such as dust, dirt, rust, oil and other contaminants. Non-porous substrates should be cleaned with a solvent and clean, lint-free, cotton cloth. Remove residual solvent before it evaporates with a fresh clean, dry cloth. For application from cartridges cut thread open, fix nozzle on top and cut to required bead size. The sealant can be applied in beads or layers. It requires moisture in order to cure.
- The curing time can take longer at lower temperatures, lower humidity or by low volume of air exchange.
Adhesion
- WACKER 180 - HIGH TEMPERATURE exhibits excellent primerless adhesion to most non-porous siliceous materials (e.g. glass, tiles, ceramics, enamel, glazed tiles); metals (e.g. aluminum, steel); impregnated, varnished or painted wood; and some plastics.
- Users must carry out own tests due to the great variety of substrates.
- The adhesion can be improved in many cases by pretreatment of the substrate with a primer.
Properties
- Cured Properties
- Uncured Properties
| Value | Units | Test Method / Conditions | |
| Modulus (at 100 % elongation, joint) | 0.45 | N/mm² | ISO 8339 |
| Modulus (at 100 % elongation, S2-dumbbell) | 0.46 | N/mm² | ISO 37 |
| Shore Hardness A | 25 | — | ISO 868 |
| Tensile Strength (joint) | 0.7 | N/mm² | — |
| Tensile Strength (S2-dumbbell) | 1.2 | N/mm² | ISO 37 Type 1 |
| Ultimate Elongation (joint) | 250 | % | — |
| Ultimate Elongation (S2-dumbbell) | 370 | % | — |
| Value | Units | Test Method / Conditions | |
| Consistency | Non-sag | — | ISO 7390, Profile U 20 |
| Density (at 23°C, 1013 hPa) | 1.02 | g/cm³ | ISO 1183-1 A |
| Extrusion Mass Flow Rate (at 6 bar) | 200 - 700 | g/min | — |
| Skin Formating Time | approx. 20 | minutes | Internal method |
Regulatory & Compliance
- Restrictions on Use
- Restrictions on use WACKER 180 - HIGH TEMPERATURE should not be used on substrates such as marble, concrete, fibrous cement and mortar, as the product releases acetic acid during curing. WACKER® 180 - HIGH TEMPERATURE should not be used in contact with metals such as lead, copper, brass or zinc due to corrosion.
- WACKER® 180 - HIGH TEMPERATURE may be discolored in contact with some organic elastomers, e.g. EPDM and neoprene.
- WACKER® 180 - HIGH TEMPERATURE is not suitable for applications involving contact with natural stone, such as marble, granite, quartzite, as it can cause staining.
- WACKER® 180 - HIGH TEMPERATURE is not recommended for sealing of aquarium or for long term use under water.
- WACKER® 121 - AQUARIUM has been specifically developed for aquarium applications.
- WACKER® 180 - HIGH TEMPERATURE must not be used for structural glazing bonding.
- WACKER® 180 - HIGH TEMPERATURE is not suitable as cylinder head gasket or for parts that are constantly exposed to fuels (petrol).
- It is the responsibility of the user to test the compatibility of the sealant with the adjoining materials. Incompatible substances like coatings or organic plasticizers can lead to discoloration of the sealant. Cleaning agents and gaseous emissions can damage the sealant in its function or change its appearance.
Safety & Health
- Safety Notes
- During vulcanization acetic acid is released. These vapors should not be inhaled for long periods or in high concentration. Hence, good ventilation of the work place is necessary. Should uncured silicone rubber come into contact with eyes or mucous membranes, the affected area must be rinsed thoroughly with water as irritation will otherwise be caused. Avoid prolonged contact of uncured sealant with the skin, use a dry cloth or paper to remove it.
- Keep out of reach of children.
- Cured silicone rubber, however, can be handled
Packaging & Availability
- Country Availability
- Packaging Type
- Regional Availability
- Packaging Information
WACKER® 180 - HIGH TEMPERATURE is usually supplied in standard size cartridges that fit all standard caulking guns.