My Mercedes windscreen developed a small leak during the hot dry summer.
Facing the prospect of either windscreen out or a very tricky and messy black sealant job - I researched for any alternative.
I came across Captain tolleys creeping crack cure and had to try it.
Absolutely fantastic and has cured the leak first time.
My advice is to clean the suspected leak area as best you can. Let it dry out thoroughly and then sparingly apply crack cure.
Add drop by drop and watch it seep into the leak. Don't fill the leak. Best to add a little then leave to set for 30 mins and then add more.
Don't rush the job.
As it goes completely clear pon drying, it leaves a perfect job and a lot less hassle compared to the more traditional car sealants.
Would highly recommend for small leaks.