Stack Mix:  For use between the “layers” of stacked monuments.  However, it’s advisable to instead use monument setting compound, available through many monument sales outlets.

1 part white Portland cement

3 parts hydrated lime

Water as necessary for a dry-ish cake batter consistency.

Directions:  If unable to find monument setting compound, stack mix may be used though not as effective as setting compound.  Mix materials and spread liberally on the bottom-most piece.  Then stack second piece atop it.  Wipe off any excess squeezing out the sides.  Repeat process for each additional “layer”. 

Slot Mix:  Used in bases in which a slot has been cut to receive mostly “tablet” style (thin, usually marble) headstones.  This mortar-style mix is used to reinstall the headstones into their bases.  If the base is broken or otherwise severely damaged, a new base may be fabricated using a common concrete mix.  However, be sure to mold a slot into the newly poured base and DO NOT set the headstone directly into a wet concrete pour.  This can lead to irreversible damage to the headstone.

1 part white Portland cement

4 parts hydrated lime

8 parts clean sand

Water as necessary for a wet pancake batter consistency.

Directions:  Mix components in the slot itself or a bucket if preferred.  Make sure headstone is level in the slot both side to side and front to back using bracing as necessary.  Pour or scoop mixture into slot surrounding stone, making sure to tamp it in to fill all possible air pockets.  Smooth with trowel or spatula, finish with paint brush, and remove any excess on stone by spraying with water. 

Void Mix:  For filling voids and cracks in headstones and mostly after epoxying broken pieces back together.

2 parts white Portland cement

4 parts hydrated lime

7 parts stone dust (note: save any fragments of tombstones not used for repair, such as those left over after cutting off the jagged bottom edge of a headstone, and crush into powder).

4 parts clean sand (white silica sand is best for white marble, regular sand for sandstone and limestone).

Water as necessary for a semi-dry bread dough consistency. 

Directions:  The most aesthetically rewarding step of tombstone restoration is the “voiding” technique and naturally, it’s also the most challenging.  Using spatulas, sticks, fingers or even dental instruments, depending on personal preference, gently pack the mixture into voids or cracks.  Smooth and mold as necessary.  Skillful hands may even recreate lettering, ornamentation and bas-relief components of headstones.  Dampen mixture as needed with sprayed water if drying too rapidly.  Use a cloth or gentle brush and water to remove excess.  An orbital sander may be carefully used after drying to remove excess or add further detail.