Has anyone used this stuff, it's really inexpensive. I wondering if it's worth trying.
ProMax Outer Casing for Brake Cables
Protect your bike and keep on rolling! The ProMax Outer Casing helps protect your brake cables and help them last longer.
* Outer casing for brake cables
* Fits 1.6-2.0mm brake and derailleur cables
* Slick coating
* Diameter: outer - 5mm, inner - 2.7mm
* Made in Germany