Tie Coat Primer 6627 is a general purpose, chlorinated rubber primer for use on metal surfaces and as a tie coat between different types of coatings. This versatile product can be used successfully above and below the waterline. When used over Pettit 6455/044 Metal Primer, it forms an excellent, easy to use system for use on all underwater running gear. It is compatible with all Pettit antifouling bottom paints, and with Easypoxy, vinyl alkyds and conventional alkyds.