Sikasil® IG-25 UV resistant insulating glass sealant
Features &Benefits
- Meets requirements of EN 1279, EOTA ETAG 002 and EN 15434,
- CEKAL and SNJF VI-VEC recognized
- European Technical Approval (ETA) based on ETAG 002
- CE-marked
Technical Product Data
| Properties | Component A Sikasil® IG-25 A | Component B Sikasil® IG-25 B |
| Chemical base |
2-C silicone |
|
| Colour (CQP1 001-1)
Colour mixed |
White / Light grey | Black / Dark grey |
|
Black / Grey S6 (special colors are available on request) |
||
| Cure mechanism | Polycondensation | |
| Cure type |
Neutral |
|
| Density (CQP 006-4)
Density mixed |
1.5 kg/l approx. | 1.1 kg/l approx. |
| 1.37 kg/l approx. | ||
|
Mixing ratio A:B by volume A:B by weight |
10:1 (OC version: 7.5:1)
13:1 (OC version: 10:1) |
|
| Viscosity (CQP 029-5) | 1’100 Pa·s approx. | 300 Pa·s approx. |
| Consistency |
Paste |
|
| Application temperature | 5 - 40°C (40 - 105°F) | |
| Snap time2 (CQP 536-3) | 45 min (OC version: 60 min) approx. | |
| Tack-free time2 (CQP 019-1) |
180 min approx. |
|
| Shore A-hardness (CQP 023-1 / ISO 868) |
45 approx. |
|
| Tensile strength (CQP 036-1 / ISO 37) | 2.3 N/mm2 approx. | |
| Elongation at break (CQP 036-1 / ISO 37) |
200% approx. |
|
| Tear propagation resistance (CQP 045-1 / ISO 34) | 6.0 N/mm approx. | |
| 100% modulus (CQP 036-1 / ISO 37) | 1.4 N/mm2 approx. | |
| 12.5% modulus (CQP 036-1 / ISO 37) | 0.3 N/mm2 approx. | |
| Movement accommodation capability (ASTM C 719) |
±12.5% |
|
| Water vapor permeability (EN 1279-4) | 18 g H2O / m2·24 h·2 mm approx. | |
| Thermal resistance (CQP 513-1)
Short term 4 hours 1 hour |
180°C (356°F) approx. 200°C (392°F) approx. 220°C (428°F) approx. |
|
| Service temperature | -40 - 150°C approx. (-40 - 302°F) | |
| Shelf life (storage below 25°C) (CQP 016-1) | 15 months | 12 months |
1)CQP = Corporate Quality Procedure 2) 23°C (73°F) / 50% r.h.
Applications
Sikasil® IG-25 is ideal as a secon- dary edge seal for insulating glass in structural glazing applications.This product is suitable for pro- fessional experienced users only. Tests with actual substrates and conditions have to be performed to ensure adhesion and material compatibility.
Cure Mechanism
Sikasil® IG-25 starts to cure imme- diately after mixing the two com- ponents.
The speed of the reaction depends mainly on the temperature, i.e. the higher the temperature the faster the curing process.
Heating above 50°C is not advis- able as it may lead to bubble for- mation.
The mixer open time, i. e. the time the material can remain in the mixer without flushing or extrusion of product is significantly shorter than the snap time indicated above. For more information please contact the Technical Ser- vice Department of Sika Industry.
Application Limits
Most Sikasil® WS, FS, SG, IG, WT, AS and other engineering silicone sealants manufactured by Sika are compatible with each other and with SikaGlaze® IG sealants. For specific information regarding compatibility between various Sikasil® and SikaGlaze® products please contact the Technical Service Department of Sika Industry. All other sealants have to be approved by Sika before using them in combination with Sikasil® IG-25. Where two or more different reactive sealants are used, allow the first to cure completely before applying the next.
Sikasil® SG, IG and WT sealants and adhesives may only be used in structural glazing or window bonding applications by experienced professionals and after a detailed examination and written approval of the corresponding project details by the Technical Service Department of Sika Industry.
The compatibility of gaskets, backer rods, setting blocks and other accessory materials with Sikasil® IG-25 must be tested in advance. The above information is offered for general guidance only. Advice on specific applications will be given on request
Method of Application
Surface preparation
Surfaces must be clean, dry and free from oil, grease and dust.
Advice on specific applications and surface pretreatment methods is available from the Technical Ser- vice Department of Sika Industry.
Application
Before processing of Sikasil® IG-25 both components have to be mixed homogeneously and air-bubble- free in the correct ratio as indicated with an accuracy of ±10%. Most commercially available metering and mixing equipments are suit- able. Please contact the System Engineering of Sika Industry for specific advice.
While the A-part of Sikasil® IG-25 is stable in air, the B-part is mois- ture-sensitive and must only be exposed briefly to air.
Joints must be properly dimen- sioned as changes are no longer possible after construction. 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. For more infor- mation please contact the Techni- cal Service Department of Sika Industry.
Tooling and finishing
Tooling and finishing must be carried out within the snap time of the adhesive.
Removal
Uncured Sikasil® IG-25 may be removed from tools and equipment with Sika® Remover-208 or an- other suitable solvent. The static mixer of the metering and mixing equipment can be cleaned with Sikasil® Mixer Cleaner. Hands and exposed skin should be washed immediately using Sika® Hand- clean Towel or a suitable industrial hand cleaner and water. Do not use solvents!
Overpainting
Sikasil® IG-25 is an elastic adhe- sive and cannot be over painted.
Further Information
Copies of the following publications are available on request:
- Material Safety Data Sheets
- Different “Application Guidelines”
Packaging Information
| Drum (comp. A) (incl. OC version) |
260 kg |
| Pail (comp. B) |
20 kg |
| Pail (comp. B - OC) |
26 kg |
| Drum (comp. B) (incl. OC version) |
180 kg |
