Bostik Vapor lock or Mapei UltraBond Eco980?

[curious1234]

Bostik Vapor lock or Mapei UltraBond Eco980?

Which is better for glue down engineered wood installation?
I need both vapor/moisture and adhesive combo.

 

[Ernesto]

Quote Bostik "For substrates that have an MVER of greater than 15 lbs or an RH
greater than 85% or for substrates where a vapor retarder is not
used or is not functioning below slab, use Bostik Ultra-Set® Single-
Step™or Bostik MVP4/Bostik Adhesive System."

I will not use the Mapei, but anything Bostik has always worked for me.