Application Tips – Liquid Gaskets
Anaerobic Liquid Gaskets for Machined Surfaces
Surface flatness of 0.1mm over a length of 400mm is recommended. Surface finish between 1.6Ra to 3.2Ra must be maintained for maximum strength. Due to these factors Loxeal anaerobic liquid gasket is recommended to be used on rigid and machines metal to metal joints.
Loxeal anaerobic FIP gaskets seal by adhesion and not compression, hence surface preparation is very important for their successful performance. Ensure surface is dry, clean and free from any foreign particles by cleaning with a solvent based cleaner.
It is a good practice to apply a continuous bead of anaerobic liquid gasket inside or around bolt holes to eliminate any secondary leak paths.
Since anaerobic liquid gaskets do not cure in presence of moisture, it is recommended to do the flange assembly in about <1Hourto avoid contamination during this time. Contamination on surface can lead to poor surface adhesion and improper curing.
After applying the material to parts, fasteners must be torqued immediately, typically in <3mins
Less than 10times nominal diameter of bolt.
Proper surface wetting/spreading of anaerobic liquid gasket is recommended for optimum sealing performance. For this purposeroller spreading or screen printing are good methods to use.
Generally anaerobic flange sealants are low to medium in strength and are easy to dismantle even after years.It is still a good idea to provide a wedge slot between two flanges to allow easy disassembly process.
RTV Sealants for Sheetmetals
Since Silicone RTV gaskets can fill large gaps up to 6mm, surface flatness and finish are not very critical in most engineering applications.
RTV Siliconegaskets seal by adhesion and not compression,hence surface preparation isvery important for their successful performance. Ensure surface is dry,clean and free fromany foreign particles by cleaning with a solvent based cleaner prior to application.
Approximately 1.25 to 2mm thick film should provide optimum performance. One can use standoffs of 0.5 to 1.25mm height or can prepare retention grooves of 1.5mm depth and 3mm widthfor cast aluminium flange and 3 to6mm width in case of stamped steel flange.
Yes.It is a good practice to apply a continuous bead of silicone inside or around bolt holes to eliminate any secondaryleak paths.
Since RTV Silicone gasket immediately starts curing after its application, it is important to assemble flange joint very quickly, typically<3min
After applying the RTV Silicone gasket to parts, fasteners must be torqued immediately, typically <5mins
Less than 10times nominal dia of flange bolt
Gasket Dressing Compounds
Gasket dressing compounds are generally recommended as an additional sealing mechanism to be used with pre-formed gaskets.Micro gaps betweenpre-formed gasket and flange are perfectly filled by gasket dressing compounds to provide perfect sealing under compression load.
GenerallyLoxeal 08-07 is recommended to be used along with a pre-formed gaseket however on low pressure systems if surface gap is less than 0.1mmit can provide good long term sealing and can be used standalone.
Gasketing dressing compounds provide sealing due to their highly thixotropic nature under compression.Hence, it is advisable to have the surface cleanedwith a solvent based cleaner to elimimate any contamination or introduce any slip.
Gasket dressing compounds are formulated to provide a sealing film that is highly resistant to a variety of industrial fluids such as gasoline,fuels,oils,waterand many more.
Loxeal 08-07 is a non-curing liquid gasketing compound that provides long term sealing while remaining pasty.Hence they are easy to apply and even easier to clean/remove/service.
Yes.They can be used on both threaded and non-threaed joints.