LOCTITE SI 5660, Grey Pipe & Thread Sealant Paste for Gasket Sealing. 100 ml Tube, -55 → +250 °C

Loctite

Product Information

Trade Name:
Loctite SI 5660
Strength:
High
Operating Temperature Range:
-55 → +250 °C
Product Form:
Paste
Colour:
Grey
Application:
Gasket Sealing
Cure Time:
1 h
Package Type:
Tube
Minimum Operating Temperature:
-55°C
Package Size:
100 ml
Maximum Operating Temperature:
+250°C
RoHs Compliant
Checking for live stock

The Loctite 5660 is a high-performance silicone-based paste designed for flexible flange and gasket sealing in demanding industrial environments. Engineered to resist extreme temperatures between -55°C and +250°C, it offers superior adhesion and sealing capability on metal, plastic, and composite surfaces. The grey colour allows easy visual confirmation during assembly and inspection.

Exceptional Chemical and Temperature Resistance

Formulated for reliability, Loctite 5660 withstands thermal expansion, vibration, and pressure variations without cracking or shrinking. Its robust silicone chemistry ensures long-term sealing performance even in oil, coolant, and water-exposed systems, making it ideal for high-stress industrial, automotive, and process equipment applications.

Leak-Proof Sealing for Pipes and Threads

Designed for pipe joints, flanges, and threaded assemblies, Loctite 5660 creates a durable, flexible seal that prevents leaks under mechanical or thermal stress. The non-corrosive, sensor-safe formulation provides an excellent alternative to traditional gaskets, reducing assembly time and improving long-term equipment reliability.

Easy Application and Rapid Curing

Supplied in a convenient 100 ml tube, Loctite 5660 applies smoothly and cures on exposure to moisture, forming a tough elastomeric seal. It’s ideal for on-site maintenance, production lines, and repair applications where downtime reduction is critical.

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Loctite 5660 (EN - SDS)(Technical Reference)
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Loctite 5660 Grey Gasket Sealant Data Sheet(Technical Reference)

Reviews

  • Samuel Mitchell
    06 Oct 2025

    The Loctite-5660 Pipe Sealant I bought from EnrgTech arrived on time and performed perfectly. Delivery was smooth, and the packaging ensured it stayed safe. The professional sales team answered all my questions, and customer care provided great post-purchase support. EnrgTech’s website made the process simple, and I really appreciate their efficient and friendly service throughout.



FAQs

Yes. We ship Loctite 5660 Internationally to many countries around the world.
Yes. You can also search Loctite 5660 on website for other similar products.
We accept all major payment methods for all products including ET13906481. Please check your shopping cart at the time of order.
We use our internationally recognized delivery partners UPS/DHL. Collection of ET13906481 can also be arranged for the customer by international shipments through contacting our customer support team. Additionally, you can also search"Loctite" products on our website by using Enrgtech's Unique Manufacturing Part Number ET13906481.
You can order Loctite brand products with Loctite 5660 directly through our website or call us at +44 (0) 3303 800 157 or email our support team at sales@enrgtech.co.uk.
Yes. Our products in Pipe Sealants category are shipped in lowest possible time.
You will get a confirmation email regarding your order of LOCTITE SI 5660, Grey Pipe & Thread Sealant Paste for Gasket Sealing. 100 ml Tube, -55 → +250 °C. You can also check on our website or by contacting our customer support team for further order details on LOCTITE SI 5660, Grey Pipe & Thread Sealant Paste for Gasket Sealing. 100 ml Tube, -55 → +250 °C.