You should use Tica T500 premium outdoor silicone sealant because windows are exposed to a lot of rain and wind, ensuring durability and stability for your window frame.
Tica T300 silicone sealant provides excellent waterproofing performance. However, if you’re looking for a more cost-effective option, you can use Tica T100 or Tica T200. Keep in mind that their durability and long-term water resistance are not as strong as Tica T300.
Thank You!