Will this work to fix crack in aluminum transmission housing?

Probably not. It sealed some of the light cracks in my aluminum boat, but it did not work on the bigger ones(every time it cooled they cracked again).

Will this seal a hairline crack in a brass plumbing nipple?

I do not advise this due to the operating pressure. This is designed for low pressure applications like a refrigerator evaporator that operates approx 2 psi

Will this seal and hold freon pressure on a refrigerator aluminum chill plate (inside the frig)?

I didn't use this, my husband did & he said yes it will hold.

If you have a pinhole on the liquid side, and it is still under pressure, will this work? Or do we need to purge the system and/or have under vacuum?

Need to purge the system or not to work.

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Description

🔥 Fix leaks fast, stay cool longer!

LONG LASTING SEAL - Provides a durable, reliable fix that keeps appliances running smoothly longer.
COMPACT PORTABLE - Slim 11.68 cm stick fits easily in your toolkit for on-the-spot repairs.
TRUSTED BRAND QUALITY - Manufactured by LA-CO, a leader in bonding adhesives trusted by professionals.
HEAT ACTIVATED PRECISION - Seals pinhole leaks and hairline cracks instantly with heat—no messy mixing required.
HIGH TEMPERATURE RESILIENCE - Withstands up to 350°F, perfect for refrigeration coils and other heat-prone surfaces.

The LA-CO Heat-Seal Stik is a premixed epoxy sealer stick designed for quick, heat-activated repairs on refrigeration coils and similar surfaces. It seals pinhole leaks and hairline cracks instantly without mixing, tolerates temperatures up to 350°F, and comes in a compact, easy-to-use form factor trusted by professionals.

Reviews

F**Y

Llego antes de tiempo, y es justo lo que describe en la publicación, recomendable

11.07.2020

C**Z

This product suprised me the refrigerator is still cooling perfectly.

8.09.2025

S**E

Why did you pick this product vs others?: Successfully patched pinhole leak in aluminum evaporator. It's an r410 system, so pretty high pressure.

6.07.2025

B**N

Super fast shipping and product is exactly as described. A + Seller.

29.05.2025

K**N

Should work

25.06.2016

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ASIN	B002BY1G06
Item model number	11575
Manufacturer	La-Co
Product Dimensions	11.68 x 1.52 x 1.02 cm; 0.28 g

Heat-Seal Stik Premixed Epoxy Sealer Stick, 350 Degree

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