Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Product Type
- Technologies
- Product Families
Features & Benefits
- Ready-to-Use Product Features
- Key Information
- Single Component
- Fast Cure
- Good resistance to tear and to weather
- Elastic compound which accepts movement
- Long service life (> 20 years)
Applications & Uses
- Applications
- Cure Method
- Typical Applications
Alphaseal 121 is suitable for sealing in the following applications:
- Sanitary ware and ceramic tiling in kitchens and bathrooms.
- Infill, cladding panels and curtain walling.
- All forms of glazing systems.
- Caravans, boats, containers, refrigerated buildings and freezers.
- Air conditioning and duct work.
- In-situ gaskets for automotive and aircraft industries.
- Draft proofing casement windows and doors.
- Handling & Applications
The general application information presented here is based upon typical conditions determined by Alpha Adhesives & Sealants testing. Our recommendations on the use of this product are based on methods believed to be reliable. It is advised that users conduct their own tests to determine the suitability of the product for their specific application.
Surface Preparation
All substrate surfaces should be cleaned of any dust, grit, loose material, wax, grease and oil using Alpha Cleaner T559 TF.
Sealant Application
Application Method:
- Joint edges should be protected using masking tape.
- Cut the tip of the nozzle at a 45° angle to give a slightly larger hole than the gap that has to be filled.
- Alphaseal 121 can be applied by a pneumatic or hand gun under a uniform pressure to extrude a continuous smooth bead.
- After application, the sealant can be finished by using a wet spatula within 5 to 10 minutes of application. The tape should be removed as soon as possible before formation of a skin.
Curing
The rate of cure in the joint is dependent on the ambient conditions, the assembled joint arrangement and the depth of the sealant between the joint faces.
Cleaning
Clean tools immediately after use with Alpha Cleaner T559 TF. Clean hands with a proprietary hand cleaner.
Properties
- Physical Form
- Base
- Acetoxy-Cure Silicone
- Consistency
- Thixotropic Paste
- Typical Properties
| Value | Units | Test Method / Conditions | |
| Specific Gravity (20°C) | 1.04 | — | — |
| Drying Time (23°C and 50% RH) | 10 - 20 | Minutes | — |
| Cure Rate (23°C and 50% RH) | min. 3 | mm/24 hours | — |
| Temperature Resistance | -40 to 80 | °C | — |
| Application Temperature | 5 - 30 | °C | — |
| Coverage (Per 310ml cartridge, 5mm bead) | 15.0 | metres | — |
| Coverage (Per 310ml cartridge, 10mm bead) | 3.0 | metres | — |
Regulatory & Compliance
- Certifications & Compliance
Technical Details & Test Data
- Product Performance
The performance data presented here has been determined by Alpha Adhesives & Sealants Limited standard test methods and are average values that should not be used for specification purposes. Our recommendations on the use of this product are based on tests believed to be reliable. It is advised that users conduct their own tests to determine the suitability of the product for their specific application. Please note this product is not recommended for substrates like PE, PP, Teflon.
Test Substrates Results/Observations
Modulus at 100% Elongation (ISO 37) N/A 44 N/cm2 Elongation at Break (ISO 37) N/A > 200 % Tear Strength (ISO 34) N/A 60 N/cm2 Shore Hardness N/A Type A: ≥ 20 Sagging (ISO 7390) N/A < 3mm Chemical Resistance N/A Excellent resistance to dilute acids, dilute alkalis and other chemicals normally encountered
UV Resistance N/A Excellent
Safety & Health
- Health & Safety Information
Alphaseal 121 is not classified as hazardous according to Directive EC 1272/2008. Please refer to the Alphaseal 121 Safety Data Sheet for further health & safety information.
Packaging & Availability
- Packaging Type
- Product Availability
Product Reference Pack Size Container Box Quantity Alphaseal 121 310 ml Cartridge 25
Storage & Handling
- Storage
Alphaseal 121 should be stored in its original container, in dry conditions and at temperatures between 5°C and 20°C. Alphaseal 121 will keep satisfactorily for up to 18 months from date of manufacture if stored according to the recommended conditions.