sikaflex (polyurethane) vs. etching chemicals

[rbn14]

First off, hello everybody!

My questions is, does anyone know if etching concrete that already has joints filled with sikaflex will damage the sikaflex?

 

[LegacyIndustrial]

Your best bet is to contact Sika. In theory, it should have no reaction. The only worry would be material getting trapped along side or under it.