Stormdry XR-Mortar is a repointing mortar for walls and should not be used in ground contact. The ready-to-use express repair mortar comes pre-packaged in a 310ml mastic cartridge. Simply apply the mortar directly to cracks and defects of up to 1 cm width using the supplied nozzle and a standard mastic gun.

Once cured, XR-Mortar provides a long-lasting and waterproof repair that will visually blend in with most standard sand and cement mortars. The pre-packaged design allows for quick repairs to small areas without the need to source and mix materials, saving both time and money.

Stormdry XR-Mortar is also fully compatible with Stormdry Masonry Protection Cream, meaning it is the ideal way to prepare walls which need small localised repairs before weatherproofing. XR-Mortar's quick 4-hour drying time also allows for both repairs and Stormdry Masonry Protection Cream treatment to be carried out in 1 day.

  • Ready-to-use straight from the cartridge
  • Easy application using the supplied nozzle
  • Suitable for repairs up to 1 cm in width
  • Repairs are long-lasting and waterproof
  • Blends in visually with sand & cement mortar
  • Fully compatible with Stormdry Masonry Protection Cream

Paint or wall treatments (Stormdry Masonry Protection Cream) can be applied after only 4 hours. 48 hours drying time. 2 weeks full cured depending on conditions.

Not suitable for use below 5°C or when rain is forecast. Not suitable for whole wall repointing.

Stormdry Express Mortar cures by evaporation of moisture. In cold and damp conditions this drying process can be slowed, especially when applied in thick layers. For thick applications, it may be necessary to apply the mortar in two layers to achieve an even cure. When applying the second coat push the mortar into the first coat for a good bond. Always read the technical datasheet before applying.

Application Instructions

wetting crack

opening cartridge

attaching nozzle

Attach to mastic gun

Wet the surface

Clean away debris and wet the area to be repaired.

Cut threaded cap

Cut the threaded cap of the XR mortar cartridge.

Screw nozzle

Screw on the supplied application nozzle.

Attach to mastic gun

Insert the cartridge into a standard size mastic gun.

Fill nozzle

Apply XR Mortar

Smooth over

Match substrate colour

Fill nozzle

Pump the gun trigger until XR-Mortar fills the nozzle.

Apply XR Mortar

Carefully apply XR-Mortar into the crack or defect.

Smooth over

Smooth over the XR-Mortar using a wetted pointing trowel.

Match substrate colour

Match colour by rubbing the mortar with dust from the substrate.

Stormdry XR-Mortar drying times chart
Bend Test

Polymer-modified formulation

During our stress test, Stormdry Express Mortar outperformed other similar repair mortars available on the market, showing enhanced characteristics and maintaining its structure.

Due to its polymer-modified formulation, it remains semi-flexible after drying delivering crack-free, long-lasting, waterproof repairs.

Bend Test

Bend Stress Test

 
C1

Competitor Mortar 1

 
C2

Competitor Mortar 2

 
Stormdry

Stormdry Xr Mortar