Loctite 510 Gasket Eliminator Flange Sealant 50ml

Loctite 510 is a one-component, pink, medium strength anaerobic flange sealant. It is an acrylic (dimethacrylate ester) paste that cures when confined in the absence of air.

Henkel lists it for general gasketing and sealing of close-fitting flanged parts, applied by hand dispensing or screen printing. It is designed for gaps up to 0.25 mm.

Where this product is used

• Sealing close-fitting flanged parts in place of a cut gasket
• Flanges with gaps up to 0.25 mm; roll a film onto both faces above 0.125 mm
• Hand-dispensed application
• Screen-printed application
• Flanges needing AGA Certificate 2590 (Class II, 500 kPa), a regional approval

Features

• One component, no mixing
• Medium strength anaerobic cure
• Opaque pink paste
• Designed for gaps up to 0.25 mm
• Compressive shear at least 7.5 N/mm² after 24 hours at 22 °C
• AGA Certificate 2590, Class II, 500 kPa (regional approval)
• Cold tested to -75 °C; heat ageing at 150 °C and 185 °C to 5,000 hours

Key specifications

Available sizes

Selecting the right option

For other Loctite flange sealants, see Loctite 518 Gasket Eliminator Flange Sealant, Loctite 515 Master Gasket Flexible Sealant or Loctite 5127 Flexible Anaerobic Gasket Eliminator - 50ml (38657). Where cure is slow or gaps are large, Henkel suggests Activator SF 7471 (Loctite 7471 Primer T Surface Preparation Activator Aerosol 133g) or SF 7649 (Loctite SF 7649 Activator for Anaerobic Adhesives 133ml).

Using it

Apply by hand dispensing or screen printing. For gaps above 0.125 mm, apply a rolled film to both flange faces.

Cure speed depends on the materials, the gap and the temperature; the cure-speed graphs, tested at 5 °C, 22 °C and 40 °C, are in the Henkel data sheet. Where cure is unacceptably slow or gaps are large, use Activator SF 7471 or SF 7649.

Uncured, the sealant gives an instant seal of 0.02 MPa at a 0 mm gap and 0.01 MPa at gaps of 0.125 mm and 0.25 mm (50 mm ID x 70 mm OD polycarbonate ring). Keep any pre-cure leak check below 0.05 MPa.

To remove cured product, soak it in Loctite solvent (for example 7200) and remove it with a soft scraper.

Storage and handling

Store unopened in a dry place. The optimal storage temperature is 8 °C to 21 °C. Storage below 8 °C or above 28 °C can adversely affect the properties of the product.

Limits and safety

Not recommended for plastics, particularly thermoplastics, so check compatibility; also check aqueous washes. Not recommended for pure oxygen or oxygen-rich systems, or as a sealant for chlorine or other strong oxidisers. The AGA and NSF items are regional approvals; contact AIMS for the Henkel certificate for your application.

Frequently asked questions

Is Loctite 510 AGA approved?

Yes, in Australia. AGA Certificate 2590, Class II, working pressure 500 kPa, working temperature -10 °C to 200 °C. Henkel notes this is a regional approval.

What gap will Loctite 510 fill?

It is designed for close-fitting flanges with gaps up to 0.25 mm. For gaps above 0.125 mm, roll a film onto both flange faces.

How strong is Loctite 510?

Medium strength. Compressive shear (ISO 10123, steel pins and collars) is at least 7.5 N/mm² after 24 hours at 22 °C.

What temperature range can Loctite 510 be used in?

The AGA certificate gives a working temperature of -10 °C to 200 °C. Henkel also tested cold strength to -75 °C and hot strength from 0 °C to 200 °C.

Which activator can be used with Loctite 510?

Activator SF 7471 or SF 7649 can be used where cure is slow or gaps are large.

How fast does Loctite 510 cure?

Henkel's data sheet gives cure-speed graphs tested at 5 °C, 22 °C and 40 °C, but no fixture time. Cure speed depends on the materials, the gap and the temperature.

Related products

See also: Loctite 518 Gasket Eliminator Flange Sealant, Loctite 515 Master Gasket Flexible Sealant, Loctite 5127 Flexible Anaerobic Gasket Eliminator - 50ml (38657), Loctite 7471 Primer T Surface Preparation Activator Aerosol 133g, Loctite SF 7649 Activator for Anaerobic Adhesives 133ml.