Thread: sikaflex fc11 for breathable wader seam repairs and sealing???

Had plenty of experience with it, not in your application though. Not a product you can dilute, for ease of application keep it warm 20 - 25 degrees will make it far easier to use than if cold. It's a good quality product as sealant/adhesives go. There are some others out there that may work as well if not better as the technology has improved from 11FC (polyurethane) to products like Bostik Safe Fix or Fixall High Tac (MS Based).

Good idea to trial on something cheap, it will be hard to remove if it works.