(1) Surface dry time
It refers to the time it takes for one-component room temperature vulcanized silicone rubber to lose its viscosity when exposed to the atmosphere during curing. Ordinary refers to the time distance during which the silicone rubber flat sealant is extruded and left in the air under standard conditions without touching the hands.

(2) Curing depth
It refers to the thickness of the adhesive layer that the silicone rubber plane sealant is cured from the outside to the inside within a certain time after the glue is applied in a fixed mold under standardized conditions, such as: 2～3mm/24h , 0.6mm/h, etc.

(3) Extrudability (defined in accordance with ASTMC1183 specifications)
In accordance with the ASTM C1183 specification request, under the specification conditions, using Semco pipes and a specific nozzle (diameter 3.2mm), under specific pressure conditions, the extrusion weight per unit time is called extrudability.

(4) Instant sealing pressure
It means that the silicone rubber plane sealant is glued on the flange plate plane with a certain diameter, and then closed immediately to control the glue layer to have a reasonable thickness, and then apply air pressure at a certain rate. The maximum pressure it accepts is the instant sealing pressure.