Weathersealing for Facade and Exterior Joints
KEDA S300 is a silicone sealant intended for non-structural exterior joint sealing. It is positioned for facade contractors, installers and distributors reviewing a sealant for weather-exposed joints in the building envelope.
The focus is the weatherseal between adjoining components, not the attachment of glass, cladding or frames to the building. Product selection should consider the complete joint assembly and the project's performance requirements.
Distributor enquiries & qualifying bulk orders
| Application focus | Non-structural facade weathersealing |
|---|---|
| Selection details | Joint movement · substrates · exposure |
| Order requirements | Confirm supplied grade, colour, packaging and quantity |
Request the current product instructions and confirmed supply specifications for your application.
These application categories are not approval for every substrate or facade system. Identify the actual glass, metal finish, coating, masonry or panel surface on both sides of the joint before specifying the product.
Provide the expected movement, joint dimensions and exposure conditions before selection. The word weatherproof does not establish a movement class, and tensile elongation alone is not a joint-movement rating.
Use the confirmed product performance and project design to determine joint geometry and backing requirements. Do not enlarge an application claim solely because another silicone product is approved for a similar-looking joint.
Review materials in contact with the sealant, including coatings, primers, backing materials, gaskets, tapes and adjacent sealants. Carry out the required adhesion and compatibility checks on representative project materials.
Natural stone and other stain-sensitive surfaces need separate non-staining assessment. Insulating-glass edge seals and laminated-glass edges also require specific compatibility review. Neutral cure does not by itself establish suitability for all these materials.
Review the materials and application before choosing the supplied grade.
This overview is for planning. Obtain the actual product's instructions and SDS, together with the relevant project requirements, before application.
S200 is positioned around general window and door sealing. S300 is positioned around exposed facade weathersealing joints. This is an application distinction, not evidence that S300 has a higher movement rating or better performance in every situation. Select using the actual product data and joint requirements.
No. This page covers weathersealing, not the structural bond that secures glass. Structural glazing requires a separately specified adhesive, system design and project assessment.
A verified movement classification is not available in this draft. Submit the project requirement for review. Do not use elongation at break or another manufacturer's classification as S300's movement rating.
Not automatically. Confirm the exact chemistry and relevant safety information for the supplied formulation. Neutral cure is not a substitute for those details.
Only after the relevant compatibility and, where applicable, staining assessment. Include the actual stone, coating, gasket, tape, backing and adjacent sealant materials in the review. Similar color or a generic material name is not enough.
The requirement depends on the supplied product and actual substrate preparation. Follow the confirmed preparation system and test results. Do not advertise primerless adhesion to all surfaces.
Neither is established here. Select the joint appearance before installation. For replacement work, assess and prepare the existing assembly instead of adding a thin bead over failed material.
The packaging illustration shows a 300ml cartridge. Confirm actual capacity, available colors, carton quantity and supply conditions before ordering. A white cartridge does not indicate white sealant, and requesting another package does not establish its availability.
Send KEDA the joint drawing, materials and finishes, expected movement and weather exposure. Include the preferred color, packaging request, estimated quantity and any project-specific evidence requirements so suitability and supply options can be reviewed before quotation.
KEDA S300 Weatherproof Facade Silicone Sealant
