Pettit 6627 Specialty Tie Coat Metal Primer Pettits 6627 Tie Coat Primer 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 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 Pettit, ZSpar, and Shipendec topside p