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I don't advise generic superglue , there are ones available specific for plastics/rubbers . Also I use two part polyurethane epoxy (called shower and bath repair (https://www.amazon.co.uk/Shower-Repair-Hupeyna-Bathtub-Scratchs)) unlike superglue it takes longer to cure (24 hour). and it can be used to 'build up' the join , adding extra strength to help prevent reoccurrence