[Support request] what is the flexitank made of? To Parent Forum May 16, 2021 at 12:38 pm #822 RFRFRFRFParticipant What is flexitank made of? can I glue a patch on it? thank you May 16, 2021 at 12:39 pm #827 JoshKeymaster Hi They are made of PVC, try using a bicycle repair kit and apply the patches inside and out. You must be logged in to reply to this topic.