How much should a new bottle weigh? Mine feels kind of empty.

The bottle should be half empty. The air is required to prevent it from hardening in the bottle.

Would this work on O.D. Rubber seal surface to metal housing? (or only metal to metal?

It's only designed for metal to metal

Does well does "638" provide sealing properties? Thank you

Real non counterfeit loctite has a QR verification code on the bottle I returned mine

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Loctite 442-21448 50Ml Retaining Compound638 Maximum Strength

Loctite 442-21448 50Ml Retaining Compound638 Maximum Strength

Product ID: 489244211

Details

Brand
Loctite
Colour
Green
Item form
Liquid
Material
Acrylic
Special feature
Waterproof

💧Waterproof resilience

💪Maximum strength bonding

🧪Advanced acrylic-polyurethane formula

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Sold byAmazon KUWAITDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔗 Lock it down with Loctite – strength that won’t let go!

PRECISION APPLICATION - Compact 50ml size with easy-to-use packaging for controlled dispensing.
WATERPROOF DURABILITY - Seals and bonds with confidence, even in wet or humid environments.
UNMATCHED HOLDING POWER - Engineered for maximum strength to secure your toughest assemblies.
TRUSTED BRAND RELIABILITY - From Loctite, a leader in industrial adhesives trusted by professionals worldwide.
VERSATILE MATERIAL COMPATIBILITY - Formulated with acrylic and polyurethane for reliable adhesion on diverse surfaces.

Loctite 442-21448 is a 50ml high-strength retaining compound featuring a waterproof acrylic-polyurethane formula. Designed for professional-grade bonding, it offers durable, reliable adhesion in demanding conditions, making it ideal for securing mechanical parts and assemblies with confidence.

Specifications

ASIN	B000O01EV0
Brand	Loctite
Colour	Green
Compatible Material	Metal
Container Type	Bottle
Customer Reviews	4.8 4.8 out of 5 stars (619)
Global Trade Identification Number	00079340006393, 00079340214484
Item Form	Liquid
Item Package Quantity	1
Item Volume	50 Millilitres
Item Weight	0.18 Pounds
Manufacturer	Loctite
Manufacturer Part Number	21448
Material	Acrylic, Polyurethane
Model Number	21448
Other Special Features of the Product	Waterproof
UPC	079340214484 079340006393
Unit Count	50.0 millilitre

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