Loctite 493 Instant Adhesive

Loctite 493 is a low-viscosity clear instant adhesive engineered for maximum efficacy in close-fitting parts assembly. This industrial-grade adhesive permanently bonds mating surfaces, preventing costly structural failures caused by component separation or shifting under mechanical stress. Whether you are securing complex electronics or manufacturing precision assemblies, this premium cyanoacrylate provides a robust, leak-proof seal on all common substrates—including specific difficult materials like polyolefins when paired with an appropriate primer.

Why Choose Loctite 493 Metal Bonding Expert?

• Particularly Suited to Metals: Formulated specifically to deliver exceptional, high-strength adhesion on metal substrates.
• Multi-Material Versatility: Extends high-performance bonding capabilities across plastics, rubbers, and challenging polyolefins.
• Very Low Viscosity: The ultra-thin liquid formula easily wicks into tightly matching tolerances and narrow gaps.
• Rapid Fixture Time: Achieves firm structural fixture within 10 to 30 seconds, significantly speeding up production lines.
• Ultra Clear Aesthetics: Cures to a completely colorless and transparent finish, keeping your bonded components cosmetically flawless.

Technical Specifications

• Product Type: Cyanoacrylate (Instant Adhesive)
• Strength: High (General Purpose / Metal Bonding)
• Color: Clear / Ultra Clear
• Container Size: 28.3g
• Curing Type: Humidity

Simple Application Instructions

1. Clean: For optimal results, clean all internal and external surfaces with a residue-free cleaning solvent and let dry.
2. Apply: Apply several drops of the liquid cyanoacrylate adhesive to the mating area. For hard-to-bond plastics or polyolefins, apply LOCTITE® SF 770 or LOCTITE® SF 7239 primer beforehand.
3. Assemble: Assemble and tighten the parts as required. The formula will begin curing rapidly once confined into a thin film between the mating surfaces exposed to ambient humidity.

Frequently Asked Questions (FAQ)

What is Loctite 493 used for?

Loctite 493 is a high-strength instant adhesive designed for the rapid assembly of close-fitting components. It is specifically formulated to prevent parts from shifting or separating due to everyday mechanical handling and load stress.

Can Loctite 493 be disassembled?

No, not with standard tools alone. Because it forms a permanent, high-strength bond, disassembly typically requires prolonged exposure to standard nitromethane/acetone chemical debonders or the localized application of high heat to break down the polymer matrix.

Does Loctite 493 work on polyolefins?

Yes. While polyolefins are historically difficult to bond, Loctite 493 offers robust performance across these surfaces when used in combination with an industrial primer such as LOCTITE® SF 770 or LOCTITE® SF 7239.

Is Loctite 493 safe for standard storage environments?

Loctite 493 is safe for standard industrial environments provided it is stored correctly in its unopened container in a dry location. For optimal shelf life and performance preservation, maintain storage conditions strictly between 8°C and 21°C.