using MBP in place of Redguard?

[craigy]

I have a pail of MBP bonding primer that I decided not use over a smooth surface. I instead covered the surface with Wunderboard. Does the MBP(multisurface bonding primer) waterproof the substrate as Redguard would? Or should I spend the $45 for the Redguard?

 

[Albert]

I don't think it works as a waterproofer, far better spend $45 for the redguard

 

[craigy]

Thanks Albert, I thought so too, also the MBP is almost a year old. I'll just throw it away.

 

[Old Mod]

I’d agree with Albert above,
I would say by the very definition of the word primer it would suggest it’s not a waterproofing agent.