用Caulking gun打进写 roof cement。
https://www.homedepot.com/p/Karnak-10-3-oz-Asphalt-Flashing-Roof-Coating-Cement-19-CTG/100257533
用Caulking gun打进写 roof cement。
https://www.homedepot.com/p/Karnak-10-3-oz-Asphalt-Flashing-Roof-Coating-Cement-19-CTG/100257533