Both silicon sealant and rubber gaskets (or wedges) are used to seal window glass, but they have some distinct differences in terms of their application, performance, and aesthetics.

Silicon Sealant:

1. Application:

• Versatility: Silicon can be used to seal gaps and joints of various sizes.
• Skill Required: Applying silicon requires a steady hand and attention to detail to ensure a neat finish.

2. Performance:

• Durability: High-quality silicon sealants can last for many years and offer excellent resistance to weathering.
• Flexibility: Silicon remains flexible over time, which can be beneficial in accommodating minor shifts in the building structure.
• Maintenance: Over time, silicon may discolor or peel and might require reapplication.

3. Aesthetics:

• Finish: If not applied carefully, silicon can be messy and may affect the clean lines of the window.

Rubber Gasket (Rubber Wedge):

1. Application:

• Ease of Use: Gaskets are usually pre-formed to fit and are generally easy to install.
• Limitations: Gaskets may not be suitable for irregular or non-standard window shapes.

2. Performance:

• Durability: Rubber gaskets can degrade over time due to exposure to the elements.
• Sealing Ability: They provide an effective seal against water and air infiltration.
• Maintenance: Replacing a gasket can be simpler than reapplying silicon, but it still requires some effort.

3. Aesthetics:

• Finish: Gaskets provide a clean, consistent look as they are usually designed to fit precisely.

Comparison:

• Cost: Silicon sealants might be less expensive than custom rubber gaskets.
• Weather Resistance: Both materials offer good weather resistance, but silicon might have an edge in terms of longevity.
• Ease of Replacement: Gaskets may be easier to replace as they don’t require the careful application that silicon does.
• Aesthetics: This can be subjective, but gaskets may offer a more uniform appearance compared to silicon, which may be messier if not applied meticulously.

Ultimately, the choice between silicon sealant and a rubber gasket may depend on the specific application, budget, aesthetic preferences, and the level of maintenance the homeowner is willing to undertake.