I bought this product on Amazon after my old tube of sealant became watery after many years of storage (I am an infrequent user).  I needed a new tube for my hot water heater installation (see video on youtube under redonkilaus) and was very surprised at the excellent price on Amazon.  Also, my tube was Made In USA, and that is a very important attribute so I can support American workers!  Product is nice and pasty in consistency.  Product can be used for gas lines and water lines.  I recommend this product and would buy it again.