Mortar Belt

Mortar Belt™

Prevents Mortar Build-Up in CMU Walls

MB 3550

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Mortar Belt
  • Mortar Belt
  • Mortar Belt
  • Mortar Belt
  • Mortar Belt
  • Mortar Belt

Mortar Belt Highlights

Mortar BeltTM prevents trash mortar build up in block walls.  It manages trash mortar and prevents weeps from clogging so that moisture can effectively exit the walls.



  • It stops and holds trash mortar away from core sides and bottoms
  • Trash Mortar is caught before it plugs the weeps
  • Easy to install – simply roll out 3.5” by 50’ roll and trim
  • 100% pre-consumer recycled material

Mortar Belt Installation

  • Roll out Mortar Belt and center on block wall
  • Hold in place with a cross web of mortar or a dry masonry unit
  • Center on wall every 4 to 6 courses
  • Caution – Mortar Belt should not be used when masonry unit cells are less than 5”

Mortar Belt Ordering/Shipping

Contact MTI at 1-800-879-3348 for specific cost to your destination.

Mortar Belt Specifications


MB3550 is a 0.024" (0.6 mm) thick high impact polystyrene strip formed with 3/16" (4.8 mm) deep corrugations; 3 3/8" wide, 50'-0" (15 m) long continuous belt. System shall be designed to suspend and trap trash mortar occurring within the cells of CMU.

Product Number MB 3550
Roll Length (Feet) 50
Rolls Per Bundle 4
Linear Feet per Bundle 200
Bundles Per Box 4
Linear Feet per Box 800
Boxes per Pallet 12
Linear Feet per Pallet 9600
Pallet Size 48" x 40" x 49"