Chemical Prep Before Caulking?

[Lee Davis]

I read a thread which said that you should do some chemical preparation or cleaning before caulking. I just bought a few tubes of Vulkem 636 to repair a window leak and caulk the top of the Belly band and wondered what type of prep top do other than washing the area. Any suggestions would be appreciated

Thanks

[TomW]

For Vulkem or Parbond, I just washed the area with soap & water before use taking care to rinse thoroughly. Timing helps - wash in the morning, and caulk in the afternoon to let any water which may have seeped into the joint-to-be-caulked evaporate.

Before gluing new window seals on, I wiped the area with acetone before gluing.

Tom