I have not used it but I’ve heard this flowable sealer works very well for sealing minor windshield leaks. Might be worth trying for a temporary repair to hold it awhile.
https://www.amazon.com/gp/product/B000BKEBO0/ref=ox_sc_act_title_1?smid=ATVPDKIKX0DER&th=1
https://www.amazon.com/gp/product/B000BKEBO0/ref=ox_sc_act_title_1?smid=ATVPDKIKX0DER&th=1