Hi there,
I had 28 days of radiotherapy at Genesis Care Darlinghurst in Sydney after a left mastectomy late last year.
Because of the leftover skin folds I had (reduced from an E cup to a C cup) they could not use the Mepitel on me.
I had to send away to the US for the strata xrt but it was worth it.
I had almost no redness at all, just a bit where the breast meets the upper body which was very minor.
You only need to use a tiny bit, I put it on a couple of hours before each session and washed it off in my nightly shower, then moisturized (Moo Goo) and re applied the next day.
Had a break weekends when I moisturized three times a day.
I have really sensitive skin (get sunburned easily and heat rash when I go to the tropics) so was pleasantly surprised at how effective it was.
I only used one tube.
If you have issues after radiotherapy is finished you can use it as well to help them settle down.