Loctite 640 high-strength large-diameter retaining glue green-Materiomart
Loctite 640 high-strength large-diameter retaining glue green-Materiomart
Loctite 640 high-strength large-diameter retaining glue green-Materiomart

Loctite 640 high-strength large-diameter retaining glue green

SKU: LT01175

size:
IDH:
$56.70
$56.70
Shipping calculated at checkout.
Request data sheet
Slow-curing, high-strength methacrylate-based fastener; ideal for large diameter parts and reactive metals such as brass. LOCTITE® 640 is a green, anaerobic, low viscosity, methacrylate-containing retaining agent designed for parts requiring longer positioning times. The initial cure time for steel is 2 hours. Additionally, it is also used on reactive metals such as brass. This is a high-strength product with good temperature resistance. Maximum diameter clearance is 0.1mm and operating temperature is -55ºC to +175ºC. The product fluoresces and the presence of the product can be monitored. One-component product, no mixing required slow cure Ideal product for large diameter parts high strength Also suitable for reactive metals such as brass Good temperature resistance

Related reading

Before you specify it

Technical writing from our engineering team and from the manufacturers we carry.

Knowledge Hub
Henkel launches global threadlocking program for industrial assembly

Knowledge Hub · 2026-06-27

Henkel launches global threadlocking program for industrial assembly

Read Sealing Hydrogen Systems: How LOCTITE® Anaerobic Sealants Deliver Leak-Free Performance Under Pressure

Knowledge Hub · 2026-06-27

Sealing Hydrogen Systems: How LOCTITE® Anaerobic Sealants Deliver Leak-Free Performance Under Pressure

Read Solving the Sealing Dilemma in Fluid Machinery: How Liquid Gasket Technology Tackles the Ultimate Challenges of High Pressure, High Temperature, and Vibration

Knowledge Hub · 2026-06-27

Solving the Sealing Dilemma in Fluid Machinery: How Liquid Gasket Technology Tackles the Ultimate Challenges of High Pressure, High Temperature, and Vibration

Read

What you get with the material

We are not just shipping you a drum

A grade on its own rarely solves the problem. These are the four things we do around it.

Selection support

Tell us the substrates, the process window and the failure you are trying to avoid. We narrow the field before you order anything.

Process design

Prototyping and pilot runs

Bonded samples and pilot batches of 200–500 pcs on our own dispensing and curing equipment, so process questions are answered before mass production.

Prototyping & pilot

Cross-border supply, DDP

Destination clearance, local labelling and destination-language SDS are set up by us. Class-restricted goods are routed at quotation time, not discovered at the border.

Cross-border supply

Documentation chain

Which document, issued by whom, covering what, and notification when it changes. We pass manufacturer documentation through unchanged.

Material substitution

Common questions

Before you send the enquiry

Yes. Tell us the grade and how you intend to use it, and we will send the manufacturer’s current technical data sheet. We pass manufacturer documentation through unchanged rather than reissuing it under our own name.

No — and you should be careful with anyone in our position who says they do. What we supply is the document chain: which document exists, who issued it, what it covers, and notification when it changes. Compliance statements come from the manufacturer, not from us.

That is one of the most common reasons engineers contact us. Equivalence is a ladder, not a yes/no answer — some claims are backed by a matching data sheet, others only by chemistry family. We will tell you which rung a given substitution sits on before you commit to it.

Packaging sizes shown on this page are the standard units for this grade. Sample quantities for evaluation are handled case by case — tell us the trial you are planning and we will scope it with you.

Tell us what you are bonding

Substrates, process window, and the failure you are trying to design out. An engineer answers, not a form.

Talk to an engineer Browse all products

We do not issue compliance certificates. We supply the material, the manufacturer’s documentation, and the engineering judgement in between.