At the earliest 24 hours after installation.

The nora® hot welding rod is suitable for sealing the joints of all floorcoverings from the noraplan® system. The same tools are used as for sealing the joints of plastic floorings.

1. The joints are milled or cut open approx. 3.5 mm wide with the joint milling machine (Figure 1) and/or the special joint cutter. For floorings with a foam underlay, the depth of the joints must not be more than 1.5 mm; please make sure not to mill out or cut open the foam underlay.
2. After the milling chips have been removed, the hot welding rod is fitted using either the hand-operated hot welding gun with plugged-on fast-welding nozzle (Figure 2) or using a welding machine with Teflon roller (Figure 3). The operation temperature of the units is reached when the hot welding rod wells out slightly on the left-hand and right-hand edges of the joint.
   Attention: The welding speed is lower compared with Linoleum or PVC.

   The processing temperature is at 350 °C - 400 °C. When using the welding machine to process the hot welding rod, set the speed to 2 r.m./minute. The operating speed and temperature can be set on most welding machines, or ad-justed to the floor temperature involved. If temperature setting is not possible, adjust the operating speed accordingly.

3. The protruding part of the rod is cut off after cooling down in two worksteps, either with a Saddler's Knife or a narrow spatula, which have been ground to a sharp edge, using a weld spatula guide (Figures 4 and 5).

4. For sealing the joints between floorings and skirtings with a wide base, you must always use the nora® TH two-component joint sealing compound.

Hot-welding noraplan® with the footfall-absorbing underlay: Fix two or three layers of self-adhesive copper tape under the saddlers knife weld spatula guide. Because of this after the first cutting there remains more of the hot welding rod. So the second cut can be done properly.

Small protruding parts of hot welding rod cannot be removed by cutting them off. These parts must be melted off (Figure 6). For this purpose, a non-sharpened spatula is heated up by means of the hand-operated hot welding gun and run along the joint, thus enabling the protruding part of the hot welding rod to be easily removed (instead of cutting it off).

Consumption:
rolls 122 cm wide approx. 0.85 r.m./m²
tiles 610 x 610 mm approx. 3.50 r.m./m²

It is usually not necessary to seal the joints of noraplan® floorcoverings. However, it is advisable to seal the joints in the case of subfloors that are sensitive to damp, and in rooms which are subjected to extensive wet cleaning (e.g. operating theatres and laboratories).

The joints of floorcoverings with a footfall-absorbing underlay must always be sealed, if customary wet cleaning is done. Because of our special installation technique you can forego the joint sealing. But you must bear in mind, that customary wet-cleaning is not possible (neither initial cleaning nor maintenance cleaning). Initial cleaning has to be done in the spray-cleaner-method; maintenance cleaning has to be done as damp wiping. (See cleaning recommendation)

Supplied as:

Article 946:
round, diameter approx. 4.0 mm
rolls of approx. 100 r.m.
weight/roll: approx. 1.3 kg

If floorings are fitted without skirtings to link up directly to exposed concrete, masonry, or similar, any joints can be sealed with permanently resilient one-component joint sealing compound, which is commercially available. Please follow the processing instructions issued by the manufacturers concerned.