Raytech ray rtv rubber potting compound raytech bag rtv 350 n raytechs ray rtv rubber potting compound has the advantage of being non toxic so can be used safely in unventilated areas and has a zero shelf life meaning it can be used according to the amount required for each job reducing wastage reacting quickly at room temperature the two components transform into a rubber with high mechanical thermal and elastic characteristics it sets in less than eight minutes and is fully re