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: 16074678

Details

Brand
Permatex
Color
Grey
Item Form
Paste
Material
Epoxy Resin
Specific Uses For Product
Fleet and

💪4500 PSI strength

⏱️4-minute set time

🌡️-60°F to 300°F range

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Description

⚡ Fix it fast, fix it strong—epoxy that means business.

UNMATCHED STRENGTH - Holds up to 4500 PSI for permanent, reliable repairs.
GAP FILLING FORMULA - Fills cracks and gaps without shrinking—ready to drill or sand.
MULTI METAL MASTERY - Bonds aluminum, steel, brass, and more with ease.
RAPID 4 MINUTE CURE - Get back to work fast—no clamping needed, no downtime.
WEATHERPROOF DURABLE - Water and solvent resistant, built to withstand extreme temps.

Permatex 84109 PermaPoxy is a versatile, high-strength epoxy adhesive that cures in just 4 minutes without clamping. Designed for multi-metal bonding and gap filling, it withstands temperatures from -60°F to 300°F and delivers permanent strength up to 4500 PSI. Ideal for complex repairs and maintenance, it resists water and solvents, making it the go-to solution for professional-grade metal repairs.

Specifications

ASIN	B000ALDXV2
Best Sellers Rank	#17,410 in Automotive ( See Top 100 in Automotive ) #38 in Body Repair & Restoration Adhesives
Brand	Permatex
Brand Name	Permatex
Color	Grey
Compatible Material	Aluminum,stainless Steel,metal,steel
Container Type	Syringe
Customer Reviews	4.4 out of 5 stars 2,454 Reviews
Full Cure Time	4 Hours
Global Trade Identification Number	00686226841094
Included Components	Permatex 84109
Item Form	Paste
Item Package Quantity	1
Item Type Name	automotive-adhesives
Item Weight	2.4 ounces
Manufacturer	Permatex
Material	Epoxy Resin
Material Type	Epoxy Resin
Model	84109
Number of Pieces	1
Part Number	84109
Specific Uses For Product	Fleet and plant maintenance.
Tensile Strength	4500 Pounds Per Square Inch
UPC	686226841094
Viscosity Level	High
Volume	0.85 Fluid Ounces
Warranty Description	Warranty
Water Resistance Level	Water Resistant

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A$12

Duties & taxes included

In stock

Sold byAmazon AustraliaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Australia.

Secure transaction

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Join PRO →

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TrustScore 4.5 | 7,300+ reviews

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