Skip to Content
Henkel Adhesive Technologies
Recent searches

      Henkel Adhesive Technologies

      Gasketing sealants

      LOCTITE® 518

      General purpose, semi-flexible, rigid machine-flange sealant

      This general purpose, semi-flexible anaerobic-curing gasketing product is ideal for sealing close fitting, rigid machine flanges made of aluminum, iron or steel.

      Technical (1)

      Regulatory (1)

      Marketing materials

      Replaces Part no. (SKU/IDH):

      • 458899, LOCTITE 518 TB6MLEN/ES

      Part no. (SKU/IDH):
      2096062

      IDH Name:
      LOCTITE® 518, 6 ml Tube
      Part no. (SKU/IDH) 2096062
      LOCTITE® 518, 6 ml Tube

      Size Please make your selection 6 ml

      Packaging type Please make your selection Tube

      All marks used are trademarks and/or registered trademarks of Henkel and its affiliates in the US, Germany, and elsewhere.

      Information

      LOCTITE® 518 is a general purpose, primerless, semi-flexible, form-in-place anaerobic flange sealant. It cures – even in the presence of minor surface contaminants – to seal close fitting joints between rigid metal flanges, and will flex with minor flange movements. It provides resistance to low pressures immediately after assembly of flanges, and is ideal for use on aluminum substrates where you need very good flexibility. Typically used as a form-in-place gasket for pumps, thermostats, compressors, transmission housings and axle covers, it not only works on active metals (e.g. mild steel) but also on passive substrates, such as aluminum with a low copper content. You can expect gap performance to 0.25mm (0.01"). 
      • Semi-flexible anaerobic flange sealant
      • Adapts to surface irregularities & gap fill up to 0.01" (0.25mm)
      • Forms an instant low-pressure seal
      • Cures on inactive surfaces without primer
      • NSF registered
      • Product category:
      • Gasketing sealants

      Technologies:

      • Acrylates, anaerobic cure
      • Application method:
      • Dispense system,Manual

       

      • Applications:
      • Rigid assembly gasketing,Sealing

       

      • Chemical basis / base:
      • Dimethacrylate ester

       

      • Color:
      • Red

       

      • Cure type:
      • Anaerobic cure

       

      • Fixture time, Steel:
      • 25.0 min.

       

      • Gap fill, Unprimed:
      • 0.25 mm

       

      • Key characteristics:
      • Fluorescent,For machined, rigid flanges,Immediate low pressure sealing,Strength: medium strength,Surface contamination-tolerant,Thixotropic

       

      • Number of components:
      • 1 part

       

      • Operating temperature:
      • -55.0 °C - 150.0 °C (-65.0 °F - 300.0 °F)

       

      • Physical form:
      • Gel

       

      • Recommended for use with:
      • Metal: aluminum,Metal: iron - cast iron,Metal: passive metal,Metal: steel

       

      • Specific gravity, @ 25.0 °C:
      • 1.1

       

      • Storage temperature:
      • 8.0 °C - 21.0 °C

       

      • Viscosity:
      • 750000.0 mPa·s (cP)

       

         

           

             

               

                 

                   

                     

                       

                         

                          How to use

                            Apply LOCTITE® SF 790 to old gasket or gasket sealants and use a wood or plastic scraper to remove residues from flange surfaces. Remove burrs. It is recommended to use LOCTITE® SF 7070 to degrease and clean surfaces prior to applying the sealant.

                            If cure speed of LOCTITE® 518 is too slow due to passive metals or low temperature (below 5°C), use LOCTITE® SF 7649 activator. Allow to dry.

                            Apply a continuous bead of sealant onto one flange surface. Place the bead close to the inner rim of the flange and encircle all bolt holes. Small surface scratches will be filled by the adhesive. LOCTITE® 518 can also be applied by roller onto larger flanges.

                            Assemble flanges and tighten bolts as soon as possible. Wipe away any excess squeeze-out, as this will not cure when exposed to air due to sealant's anaerobic curing properties.

                            Disassemble bolts with standard hand tools. Use jacking-screws, cast-on bosses or recesses to lift flanges apart. Once disassembled, apply LOCTITE® SF 790 on old sealant and use a wood or plastic scraper to remove residues from flange surfaces.

                            For corroded or seized parts, use LOCTITE® LB 8040 Freeze and Release.

                          FAQ

                            Use a LOCTITE® gasketing adhesive (silicone or anaerobic depending on your application) to: completely fill voids and surface variations; replace or augment traditional gaskets; overcome typical issues of over-torqueing bolts and gasket relaxation; as well as reducing inventory with a ‘one size fits all’ solution.

                            Yes, Henkel anaerobic adhesives become highly resistant thermoset polymers once cured, making them suitable for a vast number of applications. Consult the online product resources or contact our technical teams for further information.

                            LOCTITE® silicone adhesives such as LOCTITE® SI 5920 or LOCTITE® SI 5699 have been specially formulated for high temperature engine sealing applications. However due to the very high temperatures generated in the combustion chamber care should be taken when specifying liquid gasketing materials around the cylinder head or exhaust manifold. Please consult the Henkel technical team for further advice where necessary.

                            All necessary H&S measures and PPE (personal protection equipment) requirements can be found on the product material safety data sheet, all of which are available via our website.

                          Recently viewed products

                          Request a consultation

                          Unplanned downtime or lower plant productivity can prevent you from achieving the manufacturing excellence that you are looking for. Consult with our experts to find ways to make your machine more reliable and reduce unplanned downtime to save costs.
                          Contact an expert

                          Henkel Adhesive Technologies
                          Company
                          About us
                          Locations
                          Careers
                          News
                          Current Customer eShop
                          Sustainability
                          Help
                          FAQs
                          Find a TDS
                          Find a SDS
                          Find a distributor
                          Contact us
                          Resource center
                          Product search
                          Technical Library
                          Case studies
                          White papers
                          Webinars
                          Brochures
                          Social media
                          ⓒ 2024 Henkel Corporation. ALL RIGHTS RESERVED
                          You are on a United States website