See this link:
The Best Grease for Polyurethane Bushings
If you're trying to grease polyurethane, the end-game product is Energy Suspension Formula 5... teflon base, marine grade, tacky so it won't wash out. Comes with all ES polyurethane kits and is available in bulk.
9.11104 | Best Polyurethane Bushing Grease - Formula 5 by ES
Lots of companies use ES grease, many of them privately labeled. Even Toyota supplies it with TRD sway bars (such as for the MKIV Supra)
Red bearing grease is generally made to be slick, not tacky. Polyurethane bushings need a tacky grease, otherwise, it will wash out, resulting in squeaking.
If you are using red bearing grease on polyurethane bushings, you'll be pulling it all back apart because they WILL start to squeak - especially if you wheel your rig.