Vital black rtv is the original gasket maker formulated for heavy duty applications it makes reliable ldquoformed in placerdquo gaskets which resist cracking shrinking and migration caused by thermal cycling it is ideal to replace almost any cut gasket also use to coat pre cut gaskets to increase reliability it is permanently flexible and stable at temperature of between 80ordmf to 600ordmf 62ordmf to 315ordmc intermittent it is also highly resistant to auto and shop flui