Does this epoxy do well in heat? Specifically exhaust/muffler heat?

I used to heat to remove the epoxy when it didn't hold as well as I had hoped. I don't think this would work with a muffler.

What material would be best to mix this on?

I use piece of cardboard. It works, though it’s a pain mixing it. Make sure u mix it well.

will this fill pinholes in welding? I am looking for a product that will easily fill the little pinholes and look (and react) a lot like the steel

Great question. I think it could fill the pinholes, but am unsure if it will look like the steel. You may try painting over with matched color.

Can it be used for a/c aluminum coils repair with 410A refrigerant?

No, It really doesn't work ona lot of items. We tried.

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84109 PermaPoxy 4 Minute Multi-Metal Epoxy, 0.84 oz

Product ID: 279018883

Details

Brand
Permatex
Item form
Paste
Material
Epoxy Resin
Special features
Eliminates or
Specific uses for product
Metal bonding

⏱️4-minute set time

🌡️-60°F to 300°F temp range

🛠️4500 PSI tensile strength

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Bs.285

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Sold byAmazon BoliviaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🛠️ Fix it fast, fix it forever — the ultimate multi-metal epoxy solution!

GAP FILLING POWER - Fills cracks and gaps with zero shrinkage for flawless repairs.
MULTI METAL MASTERY - Seamlessly bonds aluminum, brass, steel, and more—no welding needed.
RAPID 4 MINUTE CURE - Get permanent, high-strength bonds without the wait or clamps.
POST CURE MACHINABILITY - Drill, sand, thread, or file your repairs for a professional finish.
WORKSHOP PROOF RESISTANCE - Water, solvent, and fuel resistant for durable, long-lasting fixes.

Permatex 84109 PermaPoxy is a versatile, dark grey epoxy adhesive that sets in just 4 minutes without clamping. With a tensile strength of 4500 PSI and resistance to water, solvents, and fuels, it bonds and repairs multiple metals including aluminum, brass, and steel. Ideal for complex assemblies, it fills gaps without shrinking and can be machined after curing, making it a professional-grade alternative to welding or brazing.

Specifications

ASIN	B000ALDXV2
Best Sellers Rank	#81,852 in Automotive ( See Top 100 in Automotive ) #292 in Automotive Fillers, Adhesives & Sealants
Brand Name	Permatex
Color	Dark gray
Compatible Material	Aluminum, Brass, Chrome, Copper, Iron, Stainless Steel, Steel
Container Type	Syringe
Customer Reviews	4.4 4.4 out of 5 stars (2,368)
Full Cure Time	4 Hours
Global Trade Identification Number	00686226841094
Included Components	Permatex 84109 PermaPoxy 4 Minute Multi-Metal Epoxy, 0.84 oz.
Item Form	Paste
Item Package Quantity	1
Item Type Name	Adhesives
Item Weight	0.15 Pounds
Manufacturer	Permatex
Material Type	Epoxy Resin
Model	84109
Number of Pieces	1
Other Special Features of the Product	Eliminates welding or brazing, water and solvent resistant, gap filling
Part Number	84109
Specific Uses For Product	Metal bonding, filling, and sealing
Tensile Strength	4500 Pounds Per Square Inch
UPC	686226841094
Unit Count	25 Milliliters
Viscosity Level	High
Volume	0.85 Fluid Ounces
Water Resistance Level	Water Resistant

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