Knowde Enhanced TDS
Identification & Functionality
- Carrier
- Chemical Family
- Technologies
- Product Families
Features & Benefits
- Labeling Claims
Applications & Uses
- Applications
- Application Area
- Compatible Substrates & Surfaces
- Cure Method
- Applications
- Perimeter Sealing
- Sealing of connecting and expansion joints in the building industry
- Suitable for fenestration applications
- Especially suitable for perimeter sealing
- Sealing of joints between glazing and supporting structure (frames, transoms, mullions)
- Industrial application as sealant in the automotive, aircraft and shipbuilding industries
- 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 a 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.
- It is the responsibility of the user to test the compatibility of the sealant with the adjoining materials. Incompatible substances like coating materials (paints, varnishes and glazes) or organic plasticizer containing rubbers (EPDM, butyl and neoprene) can lead to discoloration or other impairments like loss of adhesion of the sealant. Materials in direct contact with the applied sealant like cleaning agents and materials in indirect contact like gaseous emissions can damage the sealant in its function or change its appearance.
- Because of the multitude of these materials, Wacker cannot make a general statement to the compatibility of materials with the sealant. In case of doubt the user shall conduct appropriate preliminary tests.
- The use of tooling agents should be avoided if possible. Otherwise, water or a diluted solution of a little neutral soap or alcohol in water should be sparingly applied.
Adhesion
- WACKER® 405 exhibits excellent primerless adhesion to many non-porous siliceous materials, e.g. glass, tiles, ceramics, enamel, glazed tiles and clinker, concrete and cement, metals e.g. aluminum, zinc, steel, copper, varnished or painted wood as well as many plastics.
- Users must carry out their own tests due to the great variety of substrates. The adhesion can be improved in many cases by pretreatment of the substrates with a primer.
Properties
- Cured Properties
- Uncured Properties
- Properties
- 100% silicone
- Excellent weatherability
- Excellent tooling characteristics for professional use
- Non-corrosive to metals
- Suitable for alkaline substrates such as concrete, mortar, fibrous cement
- Matt finish
- Excellent adhesion on most substrates without primer
- Solvent-free, thus featuring low volume shrinkage during vulcanization
- Ready gunnability at low (+ 5 °C) and high (+ 40 °C) temperatures
- Flexible at low (-40 °C) and high temperatures (+150 °C)
- Almost odorless
- Non-sag
| Value | Units | Test Method / Conditions | |
| Elongation (at break) | 250 | % | ISO 8339 |
| Elongation (at break) | 560 | % | ISO 37 |
| Modulus (at 100 % elongation) | 0.38 | N/mm² | ISO 37 |
| Modulus (at 100 % elongation) | 0.4 | N/mm² | ISO 8339 |
| Movement Capability | 25 | % | ISO 11600 |
| Movement Capability | 50 | % | ASTM C920 |
| Shore Hardness A | 22 | — | ISO 868 |
| Tensile Strength | 0.5 | N/mm² | ISO 8339-A |
| Tensile Strength | 1.7 | N/mm² | ISO 37 |
| Value | Units | Test Method / Conditions | |
| Consistency (at 23°C) | Non-sag | — | ISO 7390, Profile U 20 |
| Density (at 23°C) | 1.4 | g/cm³ | ISO 1183-1 A |
| Extrusion Mass Flow Rate (at 6 bar, 23°C) | 130 | g/min | — |
| Skin Formating Time (at 23°C, 50% r.h) | 15 - 25 | minutes | — |
Regulatory & Compliance
- Certifications & Compliance
- Chemical Inventories
- Quality Standards
- Restrictions on Use
- WACKER® 405 must not be used as a secondary sealant in insulating glass units.
- WACKER® 405 must not be used for structural glazing bonding.
- WACKER® 405 is not recommended for use on natural stones, such as marble, granite, quartzite, as it can cause staining.
- In this case use an alternative grade such as WACKER® 460 – NATURAL STONE.
- WACKER® 405 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® 405 is not suitable for food grade applications where the joints are likely to come in contact with food. For this application please use WACKER® 120 – FOOD CONTACT.
- WACKER® 405 is not recommended for application in permanently wet areas where the joint is strongly or permanently exposed to water, e.g. in swimming pools or public sanitary facilities.
- WACKER® 405 is not suitable for use as a mirror adhesive. For this application please use WACKER® HS - HYBRID SEALANT.
Safety & Health
- Safety Notes
- During vulcanization ethanol 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 without any risk to health.
Packaging & Availability
- Country Availability
- Packaging Type
- Regional Availability
- Packaging Information
WACKER® 405 is usually supplied in standard size cartridges that fit all standard caulking guns.