Mortar Mixers

Mortar mixers blend mortar, stucco, grout, and plaster into a consistent, workable mix that a drum-style concrete mixer cannot match. The difference is mechanical: a mortar mixer holds the drum stationary and turns internal paddles through the material, shearing sand and cement together instead of tumbling it. Masons, plasterers, and stucco crews rely on that shearing action — it is what produces a smooth, lump-free batch that trowels the way it should.

Steel Drum vs. Poly Drum

Drum material is the first real decision, and both have a legitimate case.

• Steel drum: Maximum durability under abrasive mixes and rough site handling. The traditional choice for high-volume masonry work and crews that are hard on equipment.
• Poly drum: Lighter, will not rust, and cured material releases more easily — which means faster cleanout at the end of the day. Popular with stucco and plaster crews who prize a clean drum between color batches.
• Drum capacity: Rated in cubic feet. Size to the batch your crew can actually place before it sets, not to the biggest number available.
• Paddle design and clearance: Rubber-tipped paddles that sweep close to the drum wall leave less material behind and mix faster.

What to Look For

• Engine or motor power: Stiff mortar and full batches load the drive hard. Underpowered mixers stall and wear belts and bearings early.
• Dump mechanism: A drum that tilts and locks smoothly lets one person discharge into a wheelbarrow or mud board without a fight.
• Towable frame: If the mixer moves between sites, look for a highway-rated or job-site-rated frame with proper tires rather than a bare skid.
• Guarding and access: A hinged grate keeps hands out of the paddles while still allowing you to charge the drum and inspect the mix.

Frequently Asked Questions

What is the difference between a mortar mixer and a concrete mixer?

A concrete mixer rotates the whole drum and lets gravity tumble aggregate — ideal for concrete with stone in it. A mortar mixer keeps the drum still and spins paddles through the material, which shears fine sand and cement into a uniform paste. Use a mortar mixer for mortar, stucco, plaster, and grout; use a concrete mixer for concrete.

What size mortar mixer do I need?

Match drum capacity to how fast your crew places material. A batch that sits and starts to set before it goes on the wall is wasted, so a smaller mixer running more batches often beats a large one for small crews. Larger drums make sense for multi-mason walls and continuous stucco runs.

How do I keep a mortar mixer from seizing up with cured material?

Clean it the same day, every day. Run water and gravel or a stiff brush through the drum before material sets, and keep buildup off the paddles and shaft seals. Cured mortar on a paddle shaft is what kills mixers — not the mixing itself.

Every mortar mixer here ships free to the lower 48 and is backed by our price match guarantee. Tell us what you are mixing and how many masons you are feeding and we will size the drum right the first time — call or text 331-272-5655.