In our new assembly challenge we pit the cold shrink-fit method against the hot shrink-fit method.
Both variants have their benefits. The cold shrink sleeve can be assembled without the need for tools. The cold shrink-fit method can only be used outside of buildings, however the sleeve remains permanently elastic. 
The hot shrink-fit method can be used on the outside or inside of buildings. A hot air gun or gas burner is required for assembly. The heat shrink sleeve remains rigid, but is gastight and waterright up to 2.5 bar.