Fluorinated hydrocarbon waxes are a category 4 & have a lower percentage of low-melt point fluoro additive. Used as training waxes or as racing waxes with Cera F as a final layer or alone as a race wax at a very low temp. Yellow 10: 50 F - 32 F (+10 C to 0 C). For very wet conditions and when snow is dirty. Also good for base preparation and to protect the bases while traveling.