Ceramic Adhesive Cement
Zircosem-1 is a Zircon based inorganic low-expansion cold setting ceramic cement.
Zircosem-1 is an ideal adhesive cement for halogen lamp cap fixing, embedding electrical heating elements, insulating and fixing of thermocouples, lining and maintenance of refractories, coating resistors and coils, sealing and assembling parts, which require high resistance to electricity, chemical and thermal shocks.
Zircosem-1 adheres glass to glass, glass to ceramic, ceramic to ceramic, glass to metal, ceramic to metal etc.
Application
ZIRCOCEM is a two part chemical setting cement consisting part I dry powder and part II liquid which are mixed together to make a cementing paste. The powder should be thoroughly mixed before using. Part I powder 70% to 75% by wt and part II liquid 25% to 30% by wt (i.e. to prepare 100 gms ZIRCOCEM cement paste, take 70% to 75% gms of part I powder, add 25% to 30% gms of part II liquid) Shake thoroughly part II liquid before weighing. Place weighed liquid in a clean mixing container and add powder gradually, mix them thoroughly till smooth uniform (tooth) paste consistancy is obtained. Mixing can be carried out in a mixer at slow speed or by hand with a spatula. ZIRCOCEM can be mixed to thinner consistency by regulating marginal amount of part 11 liquid.
Setting / Curing
ZIRCOCEM-1 cement paste starts internal chemical setting action in 18-24 hrs at ambient temperature. Cement paste working time is approximate 30 minutes at ambient temp. if it is desired to accelerate the cure apply oven drying at (90°C) 194°F Avoid steaming while drying.Before cementing , porous substrates may require dampening. Apply only part II liquid coat on a substrate surface before applying the cement paste.If high humidity resistance is required and if it is impractical to heat the cement, to make surface moisture resistant, suggest apply suitable lacquer or silicone coating on the cured ZIRCOCEM exposed cemented surface.
Cleaning
Equipment and contact parts used for processing ZIRCOCEM cement paste should be thoroughly cleaned with soap and water before ZIRCOCEM cement cures.
Caution
Use of excess quantity of liquid part II will reduce the mechanical strength and effect delay in setting time. Failure of cement to adhere indicates that cement adhesive strength is diminished and it should be discarded. Do not attempt to retemper the cement by adding more amount of liquid
Packaging
ZIRCOCEM-1 adhesive (part I) cement powder is available in strong air tight plastic containers, quantity 1, 5 and 25 Kgs. ZIRCOCEM (part II) liquid supplied in proportionate qty in strong airtight plastic containers
Shelf Life
ZIRCOCEM powder part I and liquid part II have a shelf life of one year, in a closed air tight container, in a dry location at room temperature.
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