Gasketing sealants
Larger gap filling gasketing product for close-fitting rigid flanges
This anaerobic-curing flange sealant for rigid machined metal flanges fills gaps up to 0.25mm (0.01") and typically provides a 30-minute fixture time.
All marks used are trademarks and/or registered trademarks of Henkel and its affiliates in the US, Germany, and elsewhere.
- Description
- Technical specification
- Rating & reviews
- Question & answer
LOCTITE® 515 is a form-in-place anaerobic-curing flange sealant that cures when confined in the absence of air between close fitting metal surfaces. It seals close fitting joints between rigid metal faces and flanges and will flex with minor flange movements. It provides resistance to low pressures immediately after assembly of flanges, and is typically used as a form-in-place gasket for pumps, thermostats, compressors, transmission housing,s and axle covers. The product is fluorescent under UV light, allowing visual inspection of the bead.
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For machined metal components
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Forms a perfect seal
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Larger gap fill up to 0.01" (0.25mm)
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Form-in-place sealant
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Fluorescent under UV for quality control
- Product category:
- Gasketing sealants
- Technologies:
- Acrylates, anaerobic cure
- Application method:
- Dispense system,Manual
- Applications:
- Rigid assembly gasketing,Sealing
- Chemical basis / base:
- Methacrylate
- Color:
- Purple
- Cure type:
- Anaerobic cure
- Fixture time:
- 30.0 min.
- Gap fill:
- 0.25 mm
- Key characteristics:
- Fluorescent,For machined, rigid flanges,Strength: medium strength,Thixotropic
- Lab shear strength:
- 6.0 N/mm²
- Number of components:
- 1 part
- Physical form:
- Gel
- Recommended for use with:
- Metal: aluminum,Metal: steel
- Storage temperature:
- 8.0 °C - 21.0 °C
- Viscosity, Brookfield - HBT, @ 25.0 °C:
- 700000.0 mPa·s (cP) - 1700000.0 mPa·s (cP)
- Viscosity, Brookfield - HBT, @ 25.0 °C:
- 150000.0 mPa·s (cP) - 375000.0 mPa·s (cP)
How to use
Apply LOCTITE® SF 7200 or 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 7063 of SF 7070 to degrease and clean surfaces prior to applying the sealant.
If cure speed of LOCTITE® 515 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® 515 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 the 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 7200 or SF 790 on old sealant and use a wood or plastic scraper to remove residues from flange surfaces.
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.
Both silicones and SMP adhesives provide excellent flexibility and gap-filling properties together with high adhesion to a wide range of substrates, making them ideal for elastic bonding & sealing applications. Silicones have superior thermal resistance for high-temperature applications whereas SMP adhesives are suitable for applications that require over-painting. There are a range of properties available for each technology type. Please speak with a Henkel representative regarding your application to determine the best available grade.
LOCTITE® Silicone adhesives such as LOCTITE® SI 5920 or LOCTITE® SI 5990 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.
