Loctite 37509 Klean ’N Prime Anaerobic Activator, 4.5 oz Aerosol
- The Loctite Klean ’N Prime Anaerobic Activator (part number 37509) is a solvent-based primer designed to clean and activate inactive surfaces to ensure proper curing of anaerobic adhesives, sealants, and threadlockers even under cold conditions.
- Features:
- Solvent-based formulation — removes light oil films for improved bond surface cleanliness
- Enables curing on inactive materials — works effectively on stainless steel, aluminum, plated surfaces, gold, silver, and more
- Speeds adhesive cure time in low-temperature environments — reliable even below room temperature
- Long on-part life — stays on treated surfaces long enough for efficient assembly without re-application
- Specifications:
- Manufacturer: Loctite
- Brand: Loctite
- Model: 37509
- Item Weight: 8 ounces
- Product Dimensions: 6.69 x 4.5 x 5.63 inches
- Item model number: 37509
- Manufacturer Part Number: 37509
- Known as: LOCTITE 7649
- Loctite IDH #: 494147
- UPC: 079340375093
- The Loctite Klean ’N Prime can also be referred to as anaerobic adhesive primer, Loctite threadlocker primer, inactive metal activator, solvent-based anaerobic activator, cold-temperature cure promoter.
Loctite, a trusted Henkel brand, offers Klean ’N Prime (part 37509) as an aerosol primer that cleans and activates inactive or cold surfaces to ensure fast, reliable curing of Loctite anaerobic adhesives and sealants—even in challenging conditions.
Q: Why use Klean ’N Prime before applying anaerobic adhesive?
A: It removes light oil contamination and treats inactive metals, enabling anaerobic adhesives, sealants, and threadlockers to cure properly. It also accelerates cure time in cold environments.
Q: On which materials is this activator most effective?
A: It is ideal for plated, stainless steel, aluminum, titanium, gold, silver, and other inactive or passive materials that normally inhibit anaerobic curing.
Q: How quickly should I apply adhesive after using the activator?
A: Apply the anaerobic adhesive or sealant shortly after the activator dries—typically within 30 seconds—to ensure optimal bonding.
