Is this a weather seal, perimeter seal or structural glazing joint?
Only suitable weather/top-sealing applications are described here. Structural glazing requires a specifically qualified system.
Glass, frames and interfaces
Glazing and perimeter sealing
Compare silicone starting points for suitable glazing top seals, window and door perimeters, and glass or metal interfaces.
Selection context
What this pathway helps you decide.
Define the glazing task first
“Glazing sealant” can describe different jobs. This pathway covers suitable top seals and perimeter interfaces; it does not establish suitability for structural glazing, insulated-glass manufacture or other specialist systems.
Two Pereseal starting points
Pereseal 802 is an acetoxy silicone documented for suitable glass, ceramic, fibreglass, metal and other non-porous materials. Pereseal N is a neutral-cure weatherproof silicone documented for a broader range of common building surfaces and sensitive surfaces or coatings. Review both TDS files and confirm the actual substrate combination.
Compatibility is visible only after it matters
Staining, corrosion, poor adhesion and coating interaction may not be obvious at application. Preliminary tests, primers where required and clean joint preparation reduce avoidable risk.
Before you choose
Questions that change the answer
Which materials meet at the joint?
Glass, aluminium, coatings, plastics, porous edges and sensitive metals can change compatibility and cure selection.
Is an acetoxy cure acceptable?
Pereseal 802 is acetoxy; the archived TDS notes limitations including uPVC and some sensitive metals.
What movement and weather exposure are expected?
Confirm the joint design and product capability against the current technical document.
Product starting points
Products to review for this application
This shortlist is not a substitute for project-specific confirmation and the current technical data sheet.
Understand the detail
Practical guidance for this work
Neutral-cure vs acetoxy silicone: what changes?
Compare neutral-cure and acetoxy silicone by cure by-product, substrates, odour, corrosion risk, weather exposure and product limitations.
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Sealant joint design basics: movement, depth and backing
Understand how substrate movement, joint width and depth, two-sided adhesion, backing, installation temperature and access shape a durable seal.
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How to test sealant adhesion and compatibility
Plan substrate identification, small adhesion checks, compatibility screening and formal project testing without overextending the result.
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How to inspect and maintain exterior sealant joints
Learn how to inspect exterior joints safely, recognise failure patterns and decide between local repair and full replacement.
Read the articleConfirm the application
Share the substrates, dimensions and exposure.
We will help narrow the range and locate the relevant technical documents.