Primer/Activator
LOCTITE SF 7649
Product category: Adhesive activators
Data sheets
Product information
- Description
- Technical specifications
LOCTITE® SF 7649 is designed to promote the curing speed of LOCTITE anaerobic adhesives and sealants without any significant loss of joint strength. It is especially recommended for applications with passive metals or inert surfaces and with large bond gaps. LOCTITE SF 7649 offers good performance at low cure temperatures, and is recommended when the application temperature is below 15°C.
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Increases cure speed on passive and inactive surfaces
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For low-temperature curing (< 5°C)
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For large bond gaps
Application method:
Brush,Pre-Applied,Spray
Applications:
Anaerobic Priming,Gasketing,Pipe Sealing,Retaining,Thread Sealing,Threadlocking
Chemical basis / base:
Acetone
Color:
Green
Cure type:
Non-Curing
Key characteristics:
Cure Accelerant,Enables Low Temperature Curing
Physical form:
Liquid
Substrates:
Metal,Metal: Passive Metal
How to use
It is recommended to use the correct LOCTITE® cleaner for the surface to be bonded (such as LOCTITE® SF 7070™) to degrease and clean surfaces prior to applying the adhesive.
LOCTITE® SF 7649 can be either sprayed or brushed onto one or both mating surfaces. For smaller gaps, it is only necessary to apply the accelerator to one surface. Pourous surfaces my require two treatments of activator.
Allow the solvent carrier of the activator to evaporate off completely so that the parts are dry to the touch. The accelerator has an on-part life of 30 days. Within that window of time, the anaerobic can be applied normally.
FAQ
Henkel recommend the use of primers such as LOCTITE® SF 7649™ & SF 7471™ with most anaerobics where both parts are classified as "inactive" metals. These metals lack the presence of iron or copper content and thus, lack the "active" metal ions required to fully cure the anaerobic product in 24 hours. These metals include plated parts, stainless steel, galvanized steel and anodized aluminum, to name a few. If, on the other hand, both or at least one part is an "active" metal, such as plain steel, brass, bronze, copper or iron, there is no need to use a primer to ensure full cure in what is typically 24 hours at room temperature. A primer will also be helpful to accelerate the cure in colder temperatures or where there are larger gaps between the metal components.
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