A pointing and grouting gun can be filled with cement grout or mortar mixes. Grout is used between tiles and is ready-mixed or available as a powder to which water is added. Mortar is used in pointing external brickwork.
Things to consider
If you are mixing mortar to use in your gun, most professionals advise using sieved builders’ sand as it is finer and will not block the nozzle.
Also, you should avoid using any gravel in mortar mixes as this will not flow through the nozzle smoothly.
It is also advised to add plasticiser to your mortar mix as this will increase its fluidity. Please follow product guidelines.
What is plasticiser?
Plasticiser is an additive that increases the fluidity of materials. It is added to grout mixes to make them flow more smoothly.