Sikasil IG-25 HM Plus, 2-Component Silicone IG Secondary Sealant, Exterior

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.

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 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.

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.

Sikasil IG-25 HM Plus cannot be overpainted.

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.