Whats the operating temp of loctite 638 tm.....we have hair crack or say void in the mig-welded metal part....resulting into water sippage...

Upto 180 deg Celsius after full cure. But shouldn't be used to fill hair crack. Use Loctite 290 instead for hair cracks.

638 Retaining Compound 50ml | High-Strength Retainer | High Temperature & Oil Resistant | Fast Fixture Time | High Viscosity | Bonds Shafts, Gears & Pulleys

Product ID: 227407182

Details

Brand
Loctite
Item Form
Liquid
Material
Methacrylate
Special Feature
durable
Specific Uses For Product
durable

🔥High-temp resistant

⏱️Fast fixture time

🛠️High viscosity for strong bonds

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€ 16.48

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Sold byAmazon PortugalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Details

Brand
Loctite
Item Form
Liquid
Material
Methacrylate

Description

🔧 Lock it down with Loctite 638 — where strength meets speed!

PRECISION VISCOSITY - High viscosity formula guarantees a secure, gap-filling bond for shafts, gears, and pulleys.
RAPID BONDING POWER - Fast fixture time means your projects move from assembly to action without delay.
UNMATCHED DURABILITY - Engineered to withstand extreme temperatures and oil exposure, ensuring long-lasting performance.
TRUSTED INDUSTRY STANDARD - Ranked top 200 in universal adhesives with a solid 4.1-star rating, backed by Henkel’s premium quality.
VERSATILE METAL COMPATIBILITY - Specially formulated for metal components, delivering reliable retention in demanding industrial applications.

Loctite 638 Retaining Compound is a premium methacrylate ester adhesive designed for high-strength bonding of metal parts. Its high viscosity ensures durable retention of shafts, gears, and pulleys, while its resistance to high temperatures and oils guarantees reliable performance in industrial environments. With a fast fixture time and waterproof properties, it’s the go-to solution for professionals demanding quick, lasting fixes.

Specifications

Brand	Loctite
Colour	Red
Item Form	Liquid
Material	Methacrylate Ester
Special Feature	durable
Specific Uses For Product	durable

Reviews

S**Y

Good

Excellent product

23.04.2026

S**N

Loctite 638

Good

2.02.2026

S**P

Excellent product

This does it work perfectly. I wanted it to seal the bottom bracket of my carbon frame cycle and it worked..

2.02.2025

P**L

Loctile 638

It's a excellent bearing retainer

28.12.2020

V**N

Good Product

31.07.2022

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