Silmate RTV1473 silicone rubber is a black, one-component, ready-to-use sealant designed for formed-in-place gasketing applications where good oil resistance is a design consideration. RTV1473 silicone rubber has a paste-like consistency when initially dispensed and cures on exposure to atmospheric moisture at room temperature to form an elastomeric, resilient silicone rubber gasket.
The paste consistency of RTV1473 silicone rubber allows the product to flow only with external pressure. As a result RTV1473 silicone rubber can be applied to horizontal, vertical or overhead surfaces in thicknesses up to 6mm (1/4 in.).
RTV1473 silicone rubber utilizes a moisture vapor cure system which releases acetic acid vapors from the sealant surface as a by-product of cure. RTV1473 silicone rubber exhibits flow characteristics for rapid dispensing with standard pumping equipment used in assembly line production systems. Two types of formed-in-place gasketing applications can be selected: a wet bead method and a cured bead method. The wet bead method involves mating parts before RTV1473 silicone rubber cure has been completed. This method provides the best seal but makes future disassembly more difficult.
In applications where easy disassembly/reassembly of parts is desired, the cured bead method should be considered. This method involves dispensing the RTV1473 on one surface and allowing the RTV1473 silicone rubber to fully cure before mechanically joining the surfaces. RTV1473 silicone rubber is not for use in delicate electrical and electronic applications in which corrosion of copper, brass or other sensitive metals is undesirable.IMPORTANT : SILMATE SILICONE RUBBER SHOULD NOT BE USED IN APPLICATIONS WHERE IT WILL BE IN CONSTANT CONTACT WITH GASOLINE, AS EXCESSIVE SWELL WILL OCCUR.