depending on the leak , there is a spray that bunnings sells in the plumbing section . maybe suitable if you are chasing a small leak . sorry i don't have a link
Butyl rubber tape over all joins is the only guaranteed way of eliminating water penetration - not the cheapest, just the best. www.ebay.com.au/sch/i.html%20tape&norover=1&mkevt=1&mkrid=705-188178-27959-0&mkcid=2&keyword=butyl%20tape&crlp=_&MT_ID=&geo_id=&rlsatarget=kwd-81638888253890:loc-9&adpos=&device=c&mktype=&loc=122831&poi=&abcId=&cmpgn=373883530&sitelnk=&adgroupid=1306220041642202&network=o&matchtype=e&msclkid=f53b6dab681814c141170fd9217d75a1
__________________
Possum; AKA:- Ali El-Aziz Mohamed Gundawiathan
Sent from my imperial66 typewriter using carrier pigeon, message sticks and smoke signals.