RTV Silicone Catalyst 50g lot. A pre-weighed measure to use directly with our half kilo RTV Silicone Kit. Compatible with any of the ACC Silicones range but NOT compatible with Viscolo Addition Cures! Available as either Blue or Red (Slow and Fast respectively) with a small surcharge for fast catalyst, since that is a more expensive version. Simply select from the drop down list if you require Blue or Red. Use the table below to assess which catalyst is better for your job, with detailed potlifes and demould times. Blue is the default option, the slow version. Note times relate to lab conditions where temperature was 20-23 Celsius. Colder temperatures will lengthen times, the reverse for colder conditions.

Note the following information: Potlife relates to the mixing and pouring time, timed from the moment catalyst touches the base silicone, Tack Free Time indicates the time at which the RTV Silicone will have a skin on it and be tack free to touch, Demould Time is the earliest time at which you may demould and 95% Cure Time represents the earliest point at which you should consider using the mould. The longer you can leave silicone to cure the less chance of deformation during demould. If using a portion of the catalyst at one time note the addition ratio is 20:1 or 50g catalyst per kilo base.