6627 Tie Coat Primer is a general purpose chlorinated rubber type product used as a primer 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 as a primer and over a variety of coatings as a tie coat.
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. 6627 Tie Coat Primer can also be used on new andbare wood on boat bottoms to seal the wood before applying an antifouling paint.
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Can be used as a metal primer or as a tie coat.
Recommended above and below the waterline.
Compatible with all Petit antifouling bottom paints as well as all single component topside paints.
Application Method: Brush, roller, airless or conventional
Number of Coats: One or Two
Dry Film Thickness per coat: 2.0 mils (spray). 2.5 mils (brush or roller).
Application Temp: 5Deg F. Min.,
100Deg F. Max.
Application Humidity: 0% R.H. min.,
90% R.H. max.
Shake or stir the 6627 Tie Coat Primer thoroughly. Apply by
brush, roller or spray. Thinning is not normally required for
brush or roller application, however, small amounts of 97
Epoxy Thinner may be used if necessary to facilitate application.
For spraying, use 97 Epoxy Thinner at levels of 5-10%
by volume to ensure a smooth finish with minimal orange
peel. Wet film thickness unthinned should be 5.7 to 7.1 mils
per coat, which yields 2.0 to 2.5 mils dry film thickness.
Suggested spray application equipment: Conventional Spray:
Binks - No. 29 or No. 62 Gun, 66 Fluid Tip & 66 PB Air Cap
or DeVilbiss - JGA 502 Gun, E Fluid Tip & 78 Air Cap. Airless
Spray: Graco 28-1 Pump with 817-819 Tip.
Coating performance, in general, is proportional to the degree
of surface preparation. Follow recommendations carefully,
avoiding shortcuts. Inadequate preparation of surfaces
will virtually assure inadequate coating performance.
Temperature is the key. At 70 you can recoat in 2 hrs and top coat in 4 so starting early you can get it done in the day. At 50 you have a problem. You might want to do this work just before you get ready to launch.I have to finish priming and painting my deck. I can't do it yet because its not warm enough yet so I'll wait. I have lots of other things to do that aren't temperature sensitive.Good luck.
Thanks for the answer. My concern was not enough hours in the day to do the 6455/044 and several coats of 6627 to get the 10 mils. and then get on a coat of bottom paint. Since the 6455/044 has a 48 hr topcoat time can the 6627 and bottom paint be done the second day?
The can just lists minimum recoat times depending on temperature. There is no mention of a max, so if it's just been a day or two you're probably ok; however, if it's been a long time you might want to check with Pettit.
You have to read the label. If you wait past the time you have to sand it. Instead of worrying about te maximum amount of time you should be more concerned with the minimum, or shortly after. You want both a chemical and mechanical bond. If you wait too long you lose the chemical bond. That being said, it solved my problem of my old finish flaking off and new paint adhered very well.
I want to paint my mast as simply as possible after using alumniprep 33. Does Petit 6455 metal primer followed by petit 6627 tie coat primer, then petit easypoxy sound OK? Jim
I have not used Tie Coat on metal. I did use it under Hydrocoat to prime bare wood. I tried the spec thinner (12097) but it evaporated too fast. I then used alcohol for thinning with good success. Don't panic when you pour in the alcohol and it turns into cottage cheese - just stir well. The Hydorcoat works great at least in New England with just a coat a year and more than a month between application and launching.
Excellent base coat primer
Applied very easily by brush. Coverage was right on the mark from the specs on the can.