Redgard is probably the most widely used liquid applied waterproofing membrane for tile in showers. This is the best redgard video I have ever seen on the internet. I'm not saying there are not other good Redgard videos out there, but this is the first time I have seen it done right when being used as a shower pan waterproofing membrane. Custom Building Product's own Redgard instructional video is very vague and instructs users to apply 2 coats. No more, no less. It is very difficult to get the correct application rate for using only 2 coats (40 sq.ft. per gallon per coat). It also does not show the details of tying into the drain as this video shows.
To see the original video from @Totally Rad Tile, click the link here:    • How to build a shower pan  .
Drew does a great job explaining, in detail, how to properly waterproof a shower using Redgaurd and a traditional weep type drain system using Hardibacker on the walls. You can also find Drew on instagram @etile.