Tech-Dry DPC Cream is an innovative silane/siloxane cream which has been specifically formulated as an easy-to-use damp-proof course material to install a durable siloxane polymer damp-course into brickwork or other masonry walls to permanently stop rising damp in masonry walls.
Tec-Dry DPC Cream is designed to be installed into the mortar bed of masonry walls. Once the DPC Cream is injected into the mortar bed, this thixotropic cream can stay in close contact with the mortar bed and slowly release silane/siloxane into the capillaries of the mortar bed until the cream is completely absorbed into the mortar bed. The cream also penetrates the bricks or other masonry substrates above and below the mortar bed. The silane/siloxane reacts with the mortar bed and the bricks forming a permanent polysiloxane damp-course within the treated wall.
Installing DPC Cream is easy. There is no special equipment required to install it. It is suitable for single, double or triple brick walls or any other types of thick masonry walls including brick, block and stone walls which contain mortar beds. DPC Cream can be installed from any one side or both sides of the masonry wall.
Once installed, DPC Cream may take several days to be completely absorbed by the mortar bed. The mortar bed will become water repellent immediately once the cream is absorbed. However, it may take up to 7 days or more for the maximum effectiveness of the water repellency of the mortar bed after the cream is absorbed.
Use Instructions
A hammer drill, a 12mm masonry drill bit, a 23cm caulking gun and a vacuum cleaner is required to install DPC CREAM. The following instructions should be followed when installing DPC CREAM:
It is important that a pilot trial is performed within the masonry wall before application in order to examine the performance and suitability of DPC CREAM for the purpose.
Locate a mortar joint at a position normally 150mm above ground level, or at or just above floor level so both sides of the wall are evident. If installation is undertaken from the inside, carefully remove any skirting boards present to reveal the lowest mortar course above the floor.
Mark holes at approximately 80 mm apart so that 3 holes can be drilled horizontally into the mortar bed of each length of brick of approximately 230 mm. The drilling depth should be approximately 10 mm less than the wall thickness. Avoid drilling holes directly above the vertical mortar joint as shown in Figure 1.
Completely remove the dust from the holes using a vacuum cleaner fitted with a proper adapter that can suck the dust from inside of the holes. It is important that NO drill dust is left in the holes!
When larger installations of the DPC Cream damp proof course is required (that is generally more than 14 lineal metres of single brick wall or 7 lineal metres of double brick work is needed to be treated) Tech-Dry provide a bulk application system. Tech-Dry bulk application system offers either 5 litres or 20 Litres tubs of DPC Cream.
The application of the DPC Cream is achieved by using a manuel hand pressure pump to apply the DPC Cream to the masonry. Tech-Dry can provide two types of pump systems.
Economy Pump (for small one of type applications)
Pro pump (for large and multiple use applications - German made)
To apply the DPC Cream from either the 5 Litre or 20 Litre tubs you simply pour the cream into the pump, and maually presurise the pump and insert the rod to the rear of the hole and squeeze the trigger. Slowly withdraw the pressure pump rod untill the hole is completly back filled with the DPC Cream.
Pumps can be and should be cleaned and rinsed with clean water after each use.
DPC Cream usage rates for different thickness of walls: DPC 5 L DPC 20 L
