Water Block Seal – S-20 by Firestone
The Firestone Water Block Seal (S-20) is designed to be used with compression to give a water tight seal.
The water block sealant should only be used on clean surfaces and not have any loose material or other contaminants such as oil, grease, etc. Comes in 10 oz tubes.
* Only ships via ground shipping because this item is classified as a flammable liquid.