Sealant 101:
Return equipment to service immediately when you make leak-proof gaskets in just one minute with the Right Stuff.® This latest elastomeric rubber gasket technology is blowout resistant and outperforms pre-cut gaskets. Specified on production lines by GM, Ford, DaimlerChrysler and Mercedes-Benz. Temperature range -75°F to 450°F (-59°C to 232°C) continuous, 500°F (260°C) intermittent.; resists ATF, coolant, oil and other shop fluids. Protects against leaks caused by vibration and thermal expansion. Sensor-safe.
Suggested Applications: Automotive and marine gaskets, valve covers, gearbox covers, pumps, compressors, oil pans, thermostat housings, water pumps
OEM specified. For dealership warranty requirements, ensures extended drivetrain warranty compliance. Fast-curing formula. Sensor safe, low odor, noncorrosive. Meets performance specs of OE silicone gaskets. Retains high flexibility, oil resistance properties through use of a patented adhesion system. Temperature range -65ºF to 500ºF (-54°C to 260°C) intermittent; resists auto and shop fluids and vibration.
Suggested Applications: Valve covers, oil pans, intake manifold end seals, timing covers, transmission pans
OEM specified. Designed specially for high-torque and high vibration applications, like those common in import engines, this premium RTV gasket maker exceeds manufacturers' performance requirements. Noncorrosive and low-odor. Maximum vibration resistance, with outstanding resistance to oils, cooling and shop fluids. Guaranteed not to leak. Temperature range -65ºF to 500ºF (-54°C to 260°C) intermittent.
Suggested Applications: Valve covers, oil pans, intake manifold end seals, timing covers, water pumps, thermostat housings
OEM specified. Permatex® Ultra silicones were developed to meet today’s technology changes. Sensor-safe, low odor, noncorrosive. Outstanding oil resistance and joint movement values. Eight times more flexible than cork/composite gaskets; three times more oil resistant than conventional silicones. Temperature range -65ºF to 500ºF (-54°C to 260°C) intermittent; resists auto and shop fluids and vibration.
Suggested Applications: Valve covers, oil pans, timing covers, transmission pans, differential covers
Fast-drying, metallic copper sealant helps dissipate heat, prevents gasket burnout and improves heat transfer. Fills minor surface irregularities. Seals instantly. Fills hot spots and surface imperfections. Temperature range -50°F to 500°F (-45°C to 260°C); resists all types of automotive fluids, especially gasoline.
Suggested Applications: Cylinder head gaskets, carburetor gaskets, exhaust manifold gaskets and other high temperature applications
Fast-drying all-purpose sealant dries to a highly tacky, non-brittle film. A reliable general adhesive. Remains effective under temperatures of -65°F to 500°F (-54°C to 260°C). Resists gasoline, oil, antifreeze, axle lube, kerosene, propane and butane.
Suggested Applications: Valve covers, fuel pumps, carburetors, manifold gaskets; seals all felt, cork, metal, paper, rubber and asbestos gaskets
There is a reason for the different suggested applications. It has to so with material properties and density. The reason Ultra Gray is used around the water ports is that it is "thinner" than ultra black. It is more consistent under clamp loads. i.e. torqued intake manifold. Hence when I used Ultra Black, my engine ate oil.
The difference between copper coat and spray tack is the addition of copper. Copper is a high conductor and promotes heat transfer. I do not want to transfer any more heat from my heads to my intake than I have to. Copper coat on headers with copper gaskets would be adventageous due to heat transfer.
The Right Stuff is very dense and high bonding strength compared to Ultra Black. I use Right Stuff on my diff covers due to it's excellent bonding characteristics. I play in the rocks + axle parts are expensive = need for a great seal. When I drain the diff oil I take out all the bolts and literally chisel the cover off with a hammer and putty knife.
I'm not trying to be a dick, just offer some good tech.