Porotherm Mortar

Porotherm Mortar

13.80 Price incl. VAT: 16.97

15KG Bag

thin-joint mortar for building with Porotherm

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Mortar for the Porotherm System








Technical Information

Storage and processing Instructions

Download pdf here

Available as 15kg bag


For a full bag mix add approximately 3.6 litres of clean water to the bucket then add the powder. Stir quickly and vigorously (using an agitator / paddle mixer) until a smooth, lump free consistency is produced. Allow to stand for 10 to 15 minutes and then stir again. The mixed mortar is transferred from the bucket into the special Porotherm mortar roller. Mortar is normally applied to a 5 to 6m length of horizontal joint using the mortar roller. The speed of rolling and the angle of application must be adjusted to ensure that an even mortar layer is applied evenly from the roller and covers the entire surface area of the horizontal joint.


Processing time: Protected mortar; approximately 4 hours at 20°C, but will be extended at lower ambient temperatures and reduced at higher ambient temperatures.

Processing temperature: Use only when the air temperature is at least 0°C and rising. Please be aware that internal situations may be colder than external and any wind chill factor must be taken into consideration. Do not use when blocks or existing work are frozen.


Do not mix with water that is partially frozen or is thawing. Mixing water should always be from a mains tap that has not been frozen. In addition, early strength development will be reduced at low temperatures and therefore the blocks and mortar must be adequately protected at all times, with appropriate insulating covers prior to and after application, so that fresh masonry does not fall below 0°C. Mixing in an insulated bucket with an insulated lid is strongly recommended.


This product contains cement and produces an alkaline reaction when it comes into contact with moisture/water. Therefore, ensure that skin and eyes are protected. If it should come into contact with the skin or eyes, rinse them thoroughly with water. Seek medical assistance immediately if it comes into contact with the eyes. Contains Chromium VI, however a reducing agent ensures that the Cr VI content of the mortar remains below 2ppm during the shelf life of the product. It may produce an allergic reaction. For full information please refer to the Material Safety Data Sheet.


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