LOCTITE primers are designed to improve bonding performance and support reliable adhesive curing on challenging surfaces. They are commonly used with compatible LOCTITE instant adhesives to enhance adhesion on plastics, rubber, and other low-surface-energy materials. Ideal for industrial assembly, manufacturing, and maintenance applications, LOCTITE primers help achieve faster, more consistent bonding. Select the appropriate primer based on the substrate material and adhesive being used.

Polyolefins & Fluoropolymers

Elastomers & Silicone Rubbers

Dissimilar Material Joints

Overcomes the non-stick surface tension of pure polypropylene (PP), high-density polyethylene (HDPE), and PTFE without requiring corona or flame treatment.

Conditions synthetic rubber compounds, thermoplastic vulcanizates, and fluoroelastomers for reliable shear strength under cyclic mechanical strain.

Balances the reaction kinetics when joining difficult engineering plastics directly to stainless steel, anodized aluminum, or sintered bronze.

Application Protocol for Peak Bond Strength

Degrease & Solvent Flash

Apply Thin Monolayer

Flash Off & Assemble

Clean target contact zones thoroughly with industrial solvent cleaner to strip processing oils, mold release agents, and particulate contaminants.

Wipe, brush, or spray a uniform, single wet coat of primer exclusively across the low-energy substrate side. Avoid pooling to preserve dimensional tolerances.

Allow thirty seconds for carrier solvent evaporation, then apply cyanoacrylate adhesive immediately and hold assembly under firm contact pressure.