Can this be used on a valve cover gasket to get a better seal?

Yes. It is better than OEM gaskets in that it conforms to any warpage, dents, dings, & other incongruities, whereas OEM gaskets are designed for factory new, perfect valve covers without flaws. Withstands 700 degrees.

Can I use this product to seal several non-moving parts of a wood burning stove instead of the standard gasketing material?

This gasketting goop is absolutely incredible for sealing wood stove parts. I’d certainly never use it on the fire box. But it can and will hold to moving parts in high temperatures. It lasts for several years on one application.

can I use this to seal radiator tubes to a heat exchanger in my gas furnace? Gaskets no longer available for it.

Greetings! As I don't know this application, specifically, I can say that say that Ultra Copper is excellent for sealing liquid coolant surfaces in truck/auto repairs. Temperature, up to about 800*F and pressures exceeding 15 psi will remain sealed with this product. U.C. remains a pliant sealing silicone "glue", but it won't harden, as epoxy does. If you need a sealer that also hastens, look elsewhere. If this is for a flange or any flat, secured surface, you're good-to-go. NO acetic acid in this product, if that's a plus for you.

Can I spread this on outside of exhaust manifold leak like you would caulk something or does it have to go between parts? F150 '04 V8

It is too much pressure and heat to use any caulk or rtv. Even muffler cement doesn't work. You might have a lean fuel mixture to cause the problem in he first place. Exhaust bolts rust solid from heat erosion, use the right amount of points on the socket to get bolts out(6 sided bolt--6 sided socket) Copper metal exhaust gaskets work well. Mr. Gasket brand.

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🔥 Seal the deal with the ultimate high-temp gasket maker!

SENSOR SAFE FORMULA - Protects sensitive engine sensors with low odor, non-corrosive silicone
SUPERIOR FLEXIBILITY - Eight times more flexible than cut gaskets, absorbing vibration and movement
EXTREME HEAT RESILIENCE - Handles turbocharger temps up to 700°F without breaking a sweat
UNMATCHED OIL RESISTANCE - Three times more oil resistant than standard silicones for lasting durability
UNIVERSAL FIT EASY APPLICATION - Perfect for exhaust systems and more, with a smooth, reliable bond every time

Permatex Ultra Copper RTV Gasket Maker is a professional-grade, high-temperature silicone sealant designed for turbochargers and exhaust systems. It withstands intermittent temperatures up to 700°F (371°C), offers superior oil resistance and flexibility, and is sensor-safe with low odor and non-corrosive properties, ensuring a durable, reliable seal in demanding automotive environments.

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Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

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Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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Manufacturer	permatex
Part number	81878
Item Weight	85 g
Product Dimensions	20.32 x 10.16 x 5.08 cm; 85 g
Item model number	81878
Size	3 Ounce Tube
Color	Black
Style	Permatex 81878 Ultra Copper Gasket Maker Exhaust - 3.5 oz.
Material	Silicone
Item thickness	1 Inches
Item Package Quantity	1
Special Features	Forms a superior bond on oil contaminated metals and maintains outstanding oil resistance
Included components	silicone
Batteries Included?	No
Batteries Required?	No

PermatexULTRA COPPER RTV GASKET MAKER NET.85g/ 3.OZ

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