Originally published 4 September 2024. Reviewed and updated 16 September 2026.
Window and door silicone sealant is used in selected glazing, frame and perimeter joints, but one cartridge is not suitable for every material or application. Product compatibility, joint design, movement, exposure and manufacturer instructions must be checked before use.
Glazing Sealant and Perimeter Sealant Are Different
A glazing joint, an aluminium frame joint and the perimeter between a frame and the building may have different requirements. The specified sealant needs to suit the substrates, expected movement, joint dimensions and exposure. Do not select a product by colour or price alone.
Check Material Compatibility
Before application, confirm compatibility with the aluminium finish, glass type, coatings, backing materials, membranes, stone, concrete, render or other adjacent surfaces. Some products can stain, react with or fail to adhere to particular materials. Use the current technical data sheet and seek supplier advice where compatibility is unclear.
Neutral-Cure and Other Sealant Types
Neutral-cure silicone is commonly considered around building and glazing components, but the cure type alone does not confirm suitability. The exact product grade, adhesion, movement capability and intended use still need to match the joint and the manufacturer’s instructions.
Joint Preparation and Application
- Confirm the approved sealant and colour before starting.
- Prepare clean, dry and sound surfaces as directed by the sealant manufacturer.
- Use compatible backing material, primer and tooling method where specified.
- Maintain the required joint shape and avoid three-sided adhesion where the design requires movement.
- Protect surrounding finishes and allow the stated curing conditions and time.
Choosing a Sealant Colour
Sealant colour can be coordinated with the powder-coated frame, glass edge, cladding or surrounding finish. Screen colours are not reliable for final approval, so compare a current physical sample where appearance is important. Availability can vary by product and supplier.
Inspection and Maintenance
Sealant joints should be inspected for separation, cracking, loss of adhesion or damage. Do not apply new silicone over a failed joint without first identifying the cause and preparing the surfaces correctly. Water entry can also relate to flashings, drainage or surrounding construction rather than the visible sealant alone.
Information to Confirm Before Ordering
- Where the sealant will be used
- All adjoining substrates and finishes
- Internal or external exposure
- Joint dimensions and expected movement
- Required colour and quantity
- Current technical and safety data sheets
For information relating to a JL aluminium window or door project, email [email protected] or call 0481 818 785. For complete product selection, see JL aluminium windows Melbourne and JL aluminium doors Melbourne.
