I found that one of my exterior doors are leaking cold air from beneath the door sill.
The product installed is Endura Z-Articulating Cap Sillâ„¢ and Sealing System
How can I seal it?
Can I use silicone around the aluminum sill?
Should I only seal from outside?
Best Answer
It looks like the subfloor is concrete. you can use a silicone, urethane, or acrylic caulk.
If silicone be sure to get one that's suited to concrete and aluminium.