Product description
The Joint Casting System TM is Tillman’s solution for the jointing of mosaic pavings and consists of the following products:
- Joint casting mortar TM a cement-bound mortar, capable of flow, to fill the joints of mosaic pavings made of natural stones. It is easy to mix and to apply and gives strength, elasticity, water-impermeability and frost resistance to the paving.
- Pre-casting agent TM VGM a ready-to-use, wax-like emulsion without solvants which prevents the adhesion of the Joint casting mortar TM on neighbouring surfaces.
- Curing compound TM VGM a ready-to-use emulsion with a retarding effect on the top layer of the (natural stone) paving, jointed with Joint casting mortar TM.
Application
Joint casting mortar TM is used to fill the joints of mosaic pavings made of natural stones like porphyry, granite, and so on. The mortar can also be used for jointing burnt materials. Pre-casting agent TM VGM is applied to surfaces which are not to be treated directly with Joint casting mortar TM, but could be stained by cement paste as the cleaning of the surface proceeds. Curing compound TM VGM retards the hardening of the top layer and thus makes the cleaning of the surface easier.
User instructions
Pretreatment: Pre-casting agent TM VGM is evenly sprayed onto the surface using a suitable spraying device. The product is applied to the clean and dry surface in dry weather. Pre-casting agent TM VGM is not sprayed onto surfaces, on which the Joint casting mortar TM is to be applied.
Joint casting: The surface to be treated has to be solid and clean, as well as free of oil and grease ( no difference between new and older pavings). 25 kg of Joint casting mortar TM are prepared with 3.5 litres of water. Mixing time is 5 minutes (use of a concrete mixer is highly recommended). The prepared mortar is applied to the wetted and pre-treated surface and distributed using appropriate tools.
Curing: Immediately after the application of Joint casting mortar TM, Curing agent TM VGM is evenly sprayed onto the treated surface which is then covered with plastic sheets. Depending on ambient temperatures and strength development, but usually after 2 to 3 hours, the sheets are removed to clean the surface using a specially developed spraying device and at low pressure. During this treatment, the thin layer of mortar on top of the stones is removed. After the cleaning, the joints should be some milimetres lower than the stones.
Remarks
The treated surfaces can be slippery after rainfall due to wax-like components. These residues can easily be removed with warm water and a pressure washer. Adherence of further layers, like paints, markings or other toppings, could be limited by possible wax-like residues.