\nFirst, check the manufacturer\u2019s technical data sheet and compare the relevant properties to the specifications of your engineering or design group. Threadlocker formulations come in a wide range of strengths and viscosities for specific compatibility with straight, tapered, fine, or coarse thread patterns in pipe, pipe fittings, and fasteners like bolts and screws.<\/p>\n
Choose the appropriate sealant strength.<\/strong><\/h3>\nThreadlockers come in a variety of strengths to serve applications that require a permanent lock or to lock fasteners in place but still allow for disassembly.\u00a0\u00a0 If the listed strength does not match your experience with the product, the following may help uncover the cause.<\/p>\n
\n- Not strong enough:<\/strong> Insufficient sealant coverage will provide lower strength. Anaerobic threadlockers prevent loosening due to vibration by filling all the voids between the threads. For optimum results, make sure that the threads are covered.<\/li>\n
- Not strong enough:<\/strong> High temperatures that go beyond the adhesive rating can interfere with the cured properties. Some manufacturers report values as Fahrenheit, others as Celsius. Check for conversion errors and confirm design specs with adhesive<\/a> selection. Specialty, high temperature anaerobic threadlockers resist 230 \u00b0C, but conventional threadlockers resist up to 150 \u00b0C.<\/li>\n
- Too strong:<\/strong> If the strength is higher than expected, consider the diameter and engagement length of the components.\u00a0 Doubling the diameter will increase the strength six-fold!\u00a0 For example, if the torque required to break away an M4 fastener is 2Nm (17.5 in.lb), it will be 12Nm (106 in.lb) on M8 and 72Nm (630 in.lb) on M16.\u00a0 Use this calculation to select a more appropriate strength threadlocker for your application.<\/li>\n<\/ol>\n
Choose Adhesive for compatibility with substrates.<\/strong><\/h3>\nSlow or passive substrates:<\/strong> Anaerobic adhesives & sealants<\/a> cure in the presence of metal and absence of oxygen.\u00a0 Some metals cause anaerobic adhesives<\/a> to cure faster than others.<\/p>\n\n\n\nVery Fast<\/strong><\/td>\nFast<\/strong><\/td>\nSlow<\/strong><\/td>\nPassive (Activator Required)<\/strong><\/td>\n<\/tr>\n\nBrass
\nCopper
\nMagnesium<\/td>\n Steel
\nNickel
\nIron
\nAluminum<\/td>\n Anodized aluminum
\nCadmium finishes
\nChrome finishes
\nPassivated metals
\nStainless steel
\nTitanium
\nZinc<\/td>\n Ceramics
\nGlass
\nPlastics
\nPainted finishes
\nLacquered finishes<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\nUsing anaerobic sealants on plastics or other non-metal surfaces is generally not recommended. However, an anaerobic activator will cause the product to cure.\u00a0 Activators also speed the cure on slower substrates but may reduce the strength of the cured threadlocker.<\/p>\n
When satisfied with the adhesive choice, review the application process to see if any of the following conditions that may cause sealant failure exist and can be corrected.<\/p>\n
Sealant failure from insufficient sealant in the bond area.<\/strong><\/h3>\nThreadlockers fill the natural voids between threads. The adhesive cures to lock the fastener and component into a single unit and prevent loosening due to vibration.\u00a0 Any air pockets trapped in the bond area will interfere with the ability to achieve desired results. Some common applications and general guidelines follow:<\/p>\n
\n- Parallel to Parallel pipe joints\n
\n- Apply a bead of sealant to the leading edge of the male part sufficient so that when the pipe is seated, a small bead of \u2018squeeze out\u2019 is visible around the circumference of the assembled joint.<\/li>\n
- Do not apply the sealant to the internal threads of the female pipe fitting to ensure full coverage and to avoid pushing adhesive into the pipe as the joint is tightened to specs.<\/li>\n<\/ol>\n<\/li>\n
- Taper to Parallel pipe joints and Taper to Taper pipe joints\n
Choose Adhesive for compatibility with substrates.<\/strong><\/h3>\nSlow or passive substrates:<\/strong> Anaerobic adhesives & sealants<\/a> cure in the presence of metal and absence of oxygen.\u00a0 Some metals cause anaerobic adhesives<\/a> to cure faster than others.<\/p>\n\n\n\nVery Fast<\/strong><\/td>\nFast<\/strong><\/td>\nSlow<\/strong><\/td>\nPassive (Activator Required)<\/strong><\/td>\n<\/tr>\n\nBrass
\nCopper
\nMagnesium<\/td>\n Steel
\nNickel
\nIron
\nAluminum<\/td>\n Anodized aluminum
\nCadmium finishes
\nChrome finishes
\nPassivated metals
\nStainless steel
\nTitanium
\nZinc<\/td>\n Ceramics
\nGlass
\nPlastics
\nPainted finishes
\nLacquered finishes<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\nUsing anaerobic sealants on plastics or other non-metal surfaces is generally not recommended. However, an anaerobic activator will cause the product to cure.\u00a0 Activators also speed the cure on slower substrates but may reduce the strength of the cured threadlocker.<\/p>\n
When satisfied with the adhesive choice, review the application process to see if any of the following conditions that may cause sealant failure exist and can be corrected.<\/p>\n
Sealant failure from insufficient sealant in the bond area.<\/strong><\/h3>\nThreadlockers fill the natural voids between threads. The adhesive cures to lock the fastener and component into a single unit and prevent loosening due to vibration.\u00a0 Any air pockets trapped in the bond area will interfere with the ability to achieve desired results. Some common applications and general guidelines follow:<\/p>\n
\n- Parallel to Parallel pipe joints\n
\n- Apply a bead of sealant to the leading edge of the male part sufficient so that when the pipe is seated, a small bead of \u2018squeeze out\u2019 is visible around the circumference of the assembled joint.<\/li>\n
- Do not apply the sealant to the internal threads of the female pipe fitting to ensure full coverage and to avoid pushing adhesive into the pipe as the joint is tightened to specs.<\/li>\n<\/ol>\n<\/li>\n
- Taper to Parallel pipe joints and Taper to Taper pipe joints\n
Very Fast<\/strong><\/td>\n| Fast<\/strong><\/td>\n | Slow<\/strong><\/td>\n | Passive (Activator Required)<\/strong><\/td>\n<\/tr>\n | Brass | \nCopper \nMagnesium<\/td>\n Steel | \nNickel \nIron \nAluminum<\/td>\n Anodized aluminum | \nCadmium finishes \nChrome finishes \nPassivated metals \nStainless steel \nTitanium \nZinc<\/td>\n Ceramics | \nGlass \nPlastics \nPainted finishes \nLacquered finishes<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n Using anaerobic sealants on plastics or other non-metal surfaces is generally not recommended. However, an anaerobic activator will cause the product to cure.\u00a0 Activators also speed the cure on slower substrates but may reduce the strength of the cured threadlocker.<\/p>\n When satisfied with the adhesive choice, review the application process to see if any of the following conditions that may cause sealant failure exist and can be corrected.<\/p>\n Sealant failure from insufficient sealant in the bond area.<\/strong><\/h3>\n
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