ELASTOSIL^® N9189

ELASTOSIL® N 9189 is a is a ready-to-use, one-part silicone rubber which starts curing when exposed to air moisture. Typical curing characteristics are given in the table "Properties Uncured".

As RTV-1 silicones require humidity for curing, free access of air moisture to the silicone rubber is essential. Additionally, the vulcanization time of ELASTOSIL® N 9189 can be greatly reduced by increasing the level of air's relative humidity. Please note that, unlike the initial skin formation, the total curing rate of RTV-1 silicones is limited by moisture's diffusion speed in silicone rubber.

Increasing the curing temperature has just a minor effect both on the skin formation time and on the curing speed. ELASTOSIL® N 9189 therefore is vulcanized typically at room temperature.

After completion of the vulcanization the silicone elastomer may continuously be exposed to constantly changing climatic conditions, sunlight and high temperature without damage. Cured ELASTOSIL® N 9189 usually shows good primerless adhesion to many substrates, e.g. glass, ceramics, metals, plastics, varnishes and powder coatings.

Detailed information about the processing of RTV-1 silicones is given in our brochure “ROOM TEMPERATURE VULCANIZING (RTV) SILICONES - MATERIAL AND PROCESSING GUIDELINES”. We recommend running preliminary tests to optimize conditions for the particular application.

Removal:

If removal of the silicone from machines or dispensing equipment is necessary, white spirit or similar nonpolar solvents are recommended. However, cleaning ideally should take place before the silicone rubber is fully vulcanized. Cured silicone needs to be rubbed off or removed mechanically, if necessary in combination with a swelling agent (solvent) or a chemical silicone remover.