Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Technologies
- Product Families
Features & Benefits
- Labeling Claims
Applications & Uses
- Compatible Substrates & Surfaces
- Cure Method
- Applications
- Food & High Temperature
- Sealing of expansion and connection joints
- Sealing in areas where food and drinking water contact is likely
- Sealant for silo and container construction
- Application Details
Processing
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.
Adhesion
WACKER® 120 - FOOD CONTACT adheres to most non-porous siliceous material, e.g. glass, tiles, ceramics, enamel, glazed tiles and clinker, impregnated, varnished or painted wood and selected plastics. The adhesion on critical substrates can be improved in many cases by pretreatment of the substrates with a suitable primer.
Properties
- Cured Properties
- Uncured Properties
- Properties
- 100% silicone
- Especially adapted for food and drinking water contact
- Suitable for food contact per US Food and Drug Administration Regulations No. 21 CFR 177.1210 and 177.2600
- Non-sag
- Good gunability at low (+5 °C) and high (+40 °C) temperatures
- Low-shrinkage during vulcanization
- Remains flexible at low (-40 °C) and high temperatures (+180 °C)
- Rapid crosslinking: quickly becomes tack-free
- Long shelf life
- Excellent adhesion to glass, vitrified surfaces, ceramic tiles, selected plastics and coatings
| Value | Units | Test Method / Conditions | |
| Elongation (at break) | 250 | % | ISO 8339-A |
| Elongation (at break) | 450 | % | ISO 37 |
| Modulus (at 100 % elongation, joint) | 0.4 | N/mm² | — |
| Modulus (at 100 % elongation, S2-dumbbell) | 0.35 | N/mm² | ISO 37 |
| Movement Capability | 25 | % | ISO 9047 |
| Shore Hardness A | 18 | — | ISO 868 |
| Tensile Strength (Joint) | 0.5 | N/mm² | ISO 8339-A |
| Tensile Strength (S2-dumbbell) | 1.2 | N/mm² | ISO 37 |
| Value | Units | Test Method / Conditions | |
| Consistency (at 23°C) | 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, 23°C) | 200 - 700 | g/min | — |
| Skin Formating Time (at 23°C, 50% r.h) | 15 | minutes | — |
Regulatory & Compliance
- Certifications & Compliance
- Chemical Inventories
- Quality Standards
- Restrictions on Use
It is the user's responsibility 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.
- WACKER 120 - FOOD CONTACT must not be used for insulating glass applications.
- WACKER® 120 - FOOD CONTACT should not be used on substrates such as concrete, fibrous cement, and mortar, as the product releases acetic acid during vulcanization.
- WACKER® 120 - FOOD CONTACT should not be used in contact with metals such as lead, copper, brass or zinc due to corrosion.
- WACKER® 120 - FOOD CONTACT may be discolored in contact with some organic elastomers, e.g. EPDM, APTK and neoprene.
- WACKER® 120 - FOOD CONTACT is not suitable for applications involving contact with natural stone, such as marble, granite, quartzite as it can cause staining. WACKER® 460 - NATURAL STONE has been specifically developed for this applications.
- WACKER® 120 - FOOD CONTACT is not recommended for structural glazing applications.
- WACKER® 120 - FOOD CONTACTis not recommended for sealing of aquaria or for longer-term use under water. WACKER ® 121 - AQUARIUM has been specifically developed for aquarium applications.
- WACKER® 120 - FOOD CONTACT is not suitable for use as a mirror adhesive.
- The time until complete curing may be extended at lower temperature, lower humidity, increasing film thickness or by low volume of air exchange.
- 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.
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. Cured silicone rubber, however, can be handled without any risk to health.
- Keep away from children.
Packaging & Availability
- Country Availability
- Packaging Type
- Regional Availability
- Packaging Information
WACKER® 120 - FOOD CONTACT is usually supplied in standard size cartridges that fit all standard caulking guns.