mason's lime

building lime, finish lime, mason’s lime

Lime used in plastering or masonry work.
References in periodicals archive ?
Lime is sold as mason's lime, quick-lime or just plain lime in waterproof sacks that hold up to 60 pounds.
A high calcium lime sold in feed stores is perfectly acceptable to use, but Type N builder's or Type S mason's lime are considered better because they must meet ASTM standards for performance in construction.
You'll need an equal number of 50-pound or 80-pound sacks of Portland cement and hydrated mason's lime (not the lime you put on the garden) and two or three times as much fine clean sand as lime or cement.