Look for Zinsser B-I-N White Shellac Base Primer or Zinsser B-I-N Advanced Synthetic Shellac.  

What about household chemicals which are considered toxic or flammable , will these be considered a breach of lease?

I guess the worst case scenario with the garage would be someone using noisy power tools or stinky chemicals.  

They manage the cleaning/balancing of the hot tub (we supply chemicals). 

I negotiate the relationships/contracts for one of the largest chemical producers in the world.

We were successful with a new chemical treatment. 

Ask them if they're okay with the smell of the orange natural cleaner (odds are these guys will also be afraid of chemicals). 

Certain chemicals can make the water unpotable. 

The enzyme products work chemically to change the urine into something that is harmless and does not smell bad.  

Before you start singing praises for certain companies and what they sell you might find this interesting....http://saferchemicals.org/newsroom/new-study-finds-toxic-chemicals-widespread-in-flooring-sold-by-top-retailers/