Sikasil® WT-120 LUM
Fast, neutral cure, silicone assembly sealant with luminescent pigment
Sikasil® WT-120 LUM is a fast curing, 1-component, non-sag, neutral cure silicone sealant. Sikasil® WT-120 LUM is especially suitable for window fabrication. It contains a luminescent pigment that aids in identifying the presence of the sealant using UV light.
- Meets the requirements of AMAA 802.3 and AMAA 805.2
- Luminescent pigment included for UV tracing
- Faster production capability in assembly processes
- High early green strength, fast cure
- Designed for flexibility in dynamic joint movement
- Superior UV and weathering resistance
- Bonds to most substrates without priming
- Compatible with IG sealants
Sikasil® WT-120 LUM
LUMINESCENT SILICONE SEALANT FOR WINDOW & DOOR
Especially suitable for window fabrication, Sikasil® WT-120 LUM contains a luminescent pigment that aids in identifying the presence of the sealant using UV light. This allows for faster production capability in assembly processes.
PRODUCT BENEFITS
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Meets the requirements of AMAA 802.3 and AMAA 805.2
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Luminescent pigment included for UV tracing
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Faster production capability in assembly processes
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High early green strength, fast cure
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Designed for flexibility in dynamic joint movement
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Superior UV and weathering resistance
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Bonds to most substrates without priming
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Compatible with IG sealants
Usage
Sikasil® WT-120 LUM has a wide adhesion range on many substrates such as glass, (coated) metal, wood, PVC and many other substrates. Sikasil® WT-120 LUM is suitable to be used as a sealant for window / door fabrication, back-bedding, cap, toe, heel, and general component assembly applications. This product is suitable for experienced professional users only. Tests with actual substrates and conditions have to be performed ensuring adhesion and material compatibility.Packaging
| Drum | 52 gal |
Product Details
| Chemical base | 1-component silicone | |
| Color (CQP001-1) | Translucent | |
| Cure mechanism | Moisture-curing | |
| Cure type | Neutral | |
| Density | 0.95 kg/l | |
| Non-sag properties (CQP061-4 / ISO 7390) | Non-sag | |
| Application temperature | Ambient | 5 ─ 40 °C (41 ─ 104 °F) |
| Skin time (CQP019-1) | 12 minutes A | |
| Tack free time (CQP019-3) | 25 minutes A | |
| Curing speed (CQP049-1) | See diagram 1 | |
| Shore A hardness (CQP023-1 / ISO 48-4) | 7 days curing at 23 °C (73 °F) / 50 % r.h. | 10 |
| Tensile strength (ASTM D412) | 1.1 MPa (160 psi) | |
| Elongation at break (ASTM D412) | 600 % | |
| Service temperature | -40 ─ 150 °C (-40 ─ 302 °F) | |
| Shelf life | 12 months B |
| CQP = Corporate Quality Procedure | A) 23 °C (73 °F) / 50 % r.h. | B) Stored below 25 °C (77 °F) |
CURE MECHANISM
Sikasil® WT-120 LUM cures by reaction with atmospheric moisture. At low temperatures the water content of the air is generally lower and the curing reaction proceeds somewhat slower (see diagram 1).
Diagram 1: Curing Speed of Sikasil® WT-120 LUM
Application
Surface Preparation
Surfaces must be clean, dry and free from grease, oil and dust. Surface treatment depends on the specific nature of the substrates and is crucial for a long lasting bond.
Application
The optimum temperature for substrate and sealant is between 15 °C and 25 °C (59 °F and 77 °F).
Sikasil® WT-120 LUM can be processed with pump equipment. For advice on selecting and setting up a suitable pump system, contact the System Engineering Department of Sika Industry.
Joints must be properly dimensioned.
Basis for calculation of the necessary joint dimensions are the technical values of the adhesive and the adjacent building materials, the exposure of the building elements, their construction and size as well as external loads.
Joints deeper than 15 mm (9/16 in.) must be avoided.
Tooling and finishing
Tooling and finishing must be carried out within the skin time of the sealant or adhesive. When tooling freshly applied Sikasil® WT-120 LUM press the adhesive to the joint flanks to get a good wetting of the bonding surface. No tooling agents to be used.
Removal
Uncured Sikasil® WT-120 LUM may be removed from tools and equipment with Sika® Remover-208 or another suitable solvent. Once cured, the material can only be removed mechanically.
Hands and exposed skin have to be washed immediately using hand wipes or a suitable industrial hand cleaner and water.
Do not use solvents on skin.
Overpainting
Sikasil® WT-120 LUM cannot be overpainted.
Application Limits
Recommended solution from Sika for structural glazing and window bonding are usually compatible to each other. These solutions consist of products such as Sikasil® SG, IG, WS and WT series. For specific information regarding compatibility between various Sikasil® products and other Sika products contact the Technical Department of Sika Industry.
To exclude materials influencing Sikasil® WT-120 LUM, all materials such as gaskets, tapes, setting blocks, sealants, etc., in direct and indirect contact have to be approved by Sika in advance.
Where two or more different reactive sealants are used, allow the first to cure completely before applying the next one.
Do not use Sikasil® WT-120 LUM on PMMA and PC elements as it may cause environmental stress cracking (crazing).