Product Data Sheet
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Sikasil® IG-25 HM Plus

2-component silicone insulating glass secondary sealant for air-/gas-filled IG units

Sikasil® IG-25 HM Plus is a 2-component, neutral-curing insulating glass secondary sealant with structural capabilities. With its high modulus at short elongation it is especially designed for air- and noble gas-filled IG-units.  

  • Meets requirements of EN 1279-4 and EN 15434 as well as ASTM C1184 and ASTM C1369
  • Structural sealant for use in insulating glass units covered by ETA-11/0391 issued by Technical Assessment Body Österreichisches Institut für Bautetchnik, Declaration of Performance 70119976, certified by notified product certification body 0757, certificate of constancy of performance 0757-CPR-596-7110760-6-5, and provided with the CE marking
  • Design tensile strength for dynamic loads:
    σdes = 0.19 MPa (ETA)
  • CEKAL recognized 
  • Excellent UV and weathering resistance
  • IBU Environmental Product Declaration (EPD) available
  • Contributes to LEED v4/v4.1 EQc 2: Low-Emitting Materials
 
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Product Data Sheet
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PRODUCT BENEFITS

  • Meets requirements of EN 1279-4 and EN 15434 as well as ASTM C1184 and ASTM C1369
  • Structural sealant for use in insulating glass units covered by ETA-11/0391 issued by Technical Assessment Body Österreichisches Institut für Bautetchnik, Declaration of Performance 70119976, certified by notified product certification body 0757, certificate of constancy of performance 0757-CPR-596-7110760-6-5, and provided with the CE marking
  • Design tensile strength for dynamic loads:
    σdes = 0.19 MPa (ETA)
  • CEKAL recognized 
  • Excellent UV and weathering resistance

  • IBU Environmental Product Declaration (EPD) available

  • Contributes to LEED v4/v4.1 EQc 2: Low-Emitting Materials

 

Usage

Sikasil® IG-25 HM Plus is ideal as a secondary edge seal for air and noble gas-filled insulating glass in structural glazing 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

Sikasil® IG-25 HM Plus (A)

Pail

26 kg

Drum

260 kg

Sikasil® IG-25 HM Plus (B)

Pail20 kg

Drum

180 kg

Product Details

Typical Product Data
Properties

Sikasil® IG-25 HM Plus (A)

Sikasil® IG-25 HM Plus (B)

Chemical base

2-component silicone

Colour (CQP001-1)

 

mixed

White, light grey

Black, dark grey

Black, grey S6

Cure mechanism

Polycondensation

Cure type

Neutral

Density (uncured)

mixed

1.41 kg/l

1.08 kg/l

1.38 kg/l

Mixing ratio

A:B by volume

A:B by weight

10:1

13:1

Viscosity (CQP029-6)

900 Pa·s

500 Pa·s

Consistency

Paste

Application temperature

ambient

5 ─ 40 °C

Snap time (CQP554-1)

60 minutes A

Tack free time (CQP019-3)

120 minutes A

Shore A hardness (CQP023-1 / ISO 48-4)

60

Tensile strength (CQP036-1 / ISO 527)

2.5 MPa

100 % modulus (CQP036-1 / ISO 527)

2.1 MPa

Elongation at break (CQP036-1 / ISO 527)

150 %

Tear propagation resistance (CQP045-1 / ISO 34)

3 N/mm

Service temperature (CQP513-1)

-40 ─ 150 °C

Shelf life

15 months B

12 months B

CQP = Corporate Quality Procedure

A) 23 °C / 50 % r. h.

B) stored below 25 °C
Technical Information

CURE MECHANISM

Sikasil® IG-25 HM Plus starts to cure immediately after mixing the two components.
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 could lead to bubble formation and is therefore not allowed.
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.

Application

Application Information

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.

Before processing Sikasil® IG-25 HM Plus 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 equipment are suitable. For advice on selecting and setting up a suitable pump system, contact the System Engineering Department of Sika Industry.

Consider that the B-component is moisture-sensitive and must therefore only be exposed briefly to air.

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.

Tooling and finishing

Tooling and finishing must be carried out within the snap time of the adhesive.

When tooling freshly applied Sikasil® IG-25 HM Plus, press the adhesive to the joint flanks to get a good wetting of the bonding surface. No tooling agents must be used.

 

Removal

Uncured Sikasil® IG-25 HM Plus may be removed from tools and equipment with Sika® Remover-208 or an-other suitable solvent. Once cured, the material can only be removed mechanically.

Re-usable, usually metallic, static mixer can be cleaned with Sika® Mixer Cleaner.

Hands and exposed skin have to be washed immediately using hand wipes such as Sika® Cleaner-350H cleaning towels or a suitable industrial hand cleaner and water. Do not use solvents on skin.

Overpainting

Sikasil® IG-25 HM Plus 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® IG-25 HM Plus, all materials such as gaskets, 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.
The above mentioned Sika process materials may only be used in structural glazing or window bonding applications after a detailed examination and written approval of the corresponding project details by Sika Industry.

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