Hydrated lime mortars, and pre-blended lime putty mortars with
or without a matched sand are commercially available. Custom mortars
are also available with color.
In most instances, pre-blended lime mortars containing sand may
not provide an exact match; however, if the project calls for
total repointing, a pre-blended lime mortar may be worth considering
as long as the mortar is compatible in strength with the masonry.
If the project involves only selected, "spot" repointing,
then it may be better to carry out a mortar analysis which can
provide a custom pre-blended lime mortar with a matching sand.
In either case, if a preblended lime mortar is to be used, it
should contain Type S or SA hydrated lime conforming to ASTM