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
- Excellent resistance to chemicals & seawater
- Can be over painted when fully cured
Applications & Uses
- Applications
- Application Area
- Compatible Substrates & Surfaces
- Cure Method
- Typical Applications
Alphaseal 121 is suitable for sealing in the following applications:
- Boat / ship building (decks, floors, panels etc.)
- Automotive industry (car body assembly, busses, containers etc.)
- Vehicle conversion, caravans.
- Window and door frame perimeter joints.
- Construction and building joints including floor and concrete joints.
- Bonding applications in metal constructions and for mounting vibrating parts.
- 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
- Base
- Moisture-Curing Polyurethane
- Consistency
- Thixotropic Paste
- Typical Properties
| Value | Units | Test Method / Conditions | |
| Specific Gravity (20°C) | 1.17 | — | — |
| Drying Time (23°C and 50% RH, Skin Formation) | 60.0 | Minutes | — |
| Cure Rate (23°C and 50% RH) | min. 4 | mm/24 hours | — |
| Temperature Resistance | -40 to 80 | °C | — |
| Application Temperature | 5 - 35 | °C | — |
| Coverage (Per 300ml cartridge, 5mm bead) | 15.0 | metres | — |
| Coverage (Per 300ml cartridge, 10mm bead) | 3.0 | metres | — |
| Compatibility with Water base Paint (After curing) | Yes | — | — |
| Compatibility with Solvent based Paint (After curing) | Testing required | — | — |
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 Approx. 0.5 MPa Modulus at Break (ISO 37) N/A > 1.4 MPa Elongation at Break (ISO 37) N/A > 600% Tear Strength (ISO 34) N/A Approx. 10 N/mm Shore Hardness N/A Type A: ≥ 45 Sagging (ISO 7390) N/A < 3mm Chemical Resistance N/A Excellent
UV Resistance N/A Good
Safety & Health
- Health & Safety Information
Alpha 132 is classified as hazardous according to Directive EC 1272/2008. Please refer to the Alpha 132 Safety Data Sheet for further health & safety information.
Packaging & Availability
- Product Availability
Product Reference Pack Size Container Box Quantity Alpha 132 300 ml Cartridge 12
Storage & Handling
- Storage
Alpha 132 should be stored in its original container, in dry conditions and at temperatures between 5°C and 20°C. Alpha 132 will keep satisfactorily for up to 12 months from date of manufacture if stored according to the recommended conditions.