Adding some cement to Bonding Coat plaster gives an accelerated set.

Does anyone know:

What are the ideal proportions?

What effect does adding the cement have? - is there an adverse effect,
make the coat more prone to crack, or what?


TIA

In article ,
(jim_in_sussex) writes:
Adding some cement to Bonding Coat plaster gives an accelerated set.

So does using an old bag of bonding coat. It's not like it takes
a long time to set anyway.

Does anyone know:

What are the ideal proportions?

What effect does adding the cement have? - is there an adverse effect,
make the coat more prone to crack, or what?

On a plastering course, we added cement to finish coat to make it
a one coat plaster for patching a small area. I've never actually
done it in real life since then though. It was a relatively small
amount of cement verses the amount of plaster, but no one was using
accurate measures.

--
Andrew Gabriel

"jim_in_sussex" wrote in message
om...
Adding some cement to Bonding Coat plaster gives an accelerated set.

Does anyone know:

What are the ideal proportions?

What effect does adding the cement have? - is there an adverse effect,
make the coat more prone to crack, or what?


Don't know. But the cement based plaster I sometimes use in fireplaces
specifically mentions to avoid any contact with gypsum plasters so
presumably there's some incompatibility there.