UV flux fraction as a function of time for the SNe II in the CSP-I sample with available Swift-UV observations. Blue dots represent our UV extrapolation method to account for the unobserved flux at shorter wavelengths than u band, while red triangles consider red-leak corrected Swift-UV data. For the cases of SN 2006bc and SN 2007od the relative differences between both UV fractions are shown since these two SNe II present the largest differences.