What does priming mortar contain?

[Alexn72]

Is there anyone who knows what primer mortar contains, I guess it's the same as regular masonry and plaster but with more water.
That is, plaster mortar a with more water = primer mortar a

 

[mexitegel]

Foundation mortar contains low-alkaline cement and lime as well as aggregate, while plaster mortar a contains cement and aggregate.

 

[Alexn72]

Then the question is how important it is to use low-alkali when priming a chimney 6 meters up...

 

[mexitegel]

It doesn't take large amounts, so even if the primer is more expensive, it won't be an economic disaster - so why take the risk?

 

[Alexn72]

Foundation mortar is not in stock and I have bought sand and Murcement.
Then it is more out of curiosity than to save a few kronor.

 

[Claes Sörmland]

The traditional render mix was combined with masonry cement, aggregate, and water. More water and masonry cement and less aggregate were used. EDIT: Googled. A render mix for thin rendering contains 1 part masonry cement to 3 parts aggregate (sand) and water to a porridge-like consistency. Commercial versions contain red pigment powder (some iron oxide?), known as "rödgrund," so you can see where you have thinly rendered and later plastered over.

(Masonry cement is a product based on a mixture of ordinary Portland cement (commercial building cement) and limestone flour.)

 

[Limesmak]

Borrowing a bit. I started finishing my lecablock for the greenhouse yesterday, first just with Murningsbruk A (Finja). Can I add a little more afterwards if I've been stingy in some areas?