DESCRIPTION
Dow Corning 201 is a one part polysulphide sealant based on thiokol LP liquid Polymer. It has excellent adhesive and weathering properties and cures to a tough flexible sealant. It is ideal for sealing agaisnt pre-cast facing and cladding panels, wall ties, granite, metal or timber window frames, masonary and certain glazing systems.
BENEFITS
|
Conforms to BS 5215
|
| Large colour range available |
| Excellent adhesion to both porous and non porous surfaces |
| Joint movement capacity +/- 17.5% |
| Easy to apply, one component sealant |
| No maintenance required |
| Unaffected by extremes in climatic conditions |
| Non slump |
MAIN USES
Dow Corning 201 is ideal for the sealing of expansion joints in brick or masonary. It is also suitable for external perimeter pointing of door and window frames.
JOINT DESIGN
When designing joints using Dow Corning 201 the minimum joint width should be 6mm. For joints between 6mm to 12mm wide a width to depth ratio of 2:1 should be used. In situations where shallow joints are needed a minimum of 6mm sealant bite to each substrate is recommended.
JOINT PREPARATION
Ensure that all surfaces are clean, dry, sound and free from frost. Clean all joints of release agents, water repellents, dust, dirt, old sealants, and other contaminants which could impair adhesion. Metal surfaces should be cleaned and degreased by wiping with a solvent on an oil and lint free cloth. Suitable solvents include Dow Corning silicone cleaner or methylated spirits.
MASKING
Areas adjacent to the joint should be masked with tape to prevent contamination of substrates and ensure a neat sealant line. Masking tape should be removed immediatley after tooling.
LIMITATIONS
Dow Corning 201 should not be applied to building materials that bleed oil, plasticisers, or solvents. It is not recommended for use with certain plastics generally of the flexible plasticised type. Dow Corning 201 should not be used if the substructure undergoes excessive thermal movement eg PVC U.
TYPICAL PROPERTIES
* The following values are not intended for use in preparing specifications
| Slump |
nil |
| Tack free time@ 25'C and 50% RH |
24 Hours |
|
Cure time @ 25'C and 50% RH
|
|
| 2.5mm thickness |
10 days |
| 6.0mm thickness |
20 days |
| Specific gravity |
16 |
| Joint movement capacity |
+/- 17.5% |
| Application Temp range |
-5 to +40'C |
| Service Temp range |
-40 to +90'C |
ESTIMATING SEALANT REQUIREMENTS (for 380ml cartridge)
| depth/width |
6 |
10 |
15 |
20 |
25 |
| 6 |
10.5 |
6.3 |
4.2 |
|
|
| 8 |
|
4.7 |
3.1 |
2.3 |
|
| 10 |
|
|
2.5 |
1.9 |
1.5 |
| 12 |
|
|
|
1.5 |
1.2 |
