The stuff the pros seem to use in the UK as a top-coat to stop latex getting sticky is Isoflex Special Primer, a transparent roofing sealant:
Note that people always say it’s toxic stuff, need to do outdoors with mask.
Has anyone seen a way to get that product in NZ?
Alternatively, anyone experimented with transparent roofing primers or other products that are available in NZ?
I see Dulex have one, I’m wondering if that would work? Specs are here. Not sure if it comes in other size than 15L, which is too big for experimenting with.
There’s also this Roof Reviver stuff, again in 20L cans.