LOCTITE 443 is an instant cyanoacrylate adhesive formulated for fast bonding where a higher-viscosity, low-vapor formulation is needed. For composite fabricators and industrial assemblers who already source resins, gasket sealants, and other instant adhesives from Thousands Technology, LOCTITE 443 fills a role where controlled flow and thin bond-gap performance matter more than open working time. This page summarizes the documented properties and application steps for this adhesive to support sourcing decisions.
Typical Properties of LOCTITE 443 (Uncured Material)
The properties below are documented for the uncured material and help buyers compare this product against other instant adhesives for a given bonding application.
| Property | Typical Value |
|---|---|
| Specific Gravity @ 25 °C | 1.05 |
| Vapour Pressure | <1 hPa |
| Viscosity, Cone & Plate (25 °C, Shear Rate 100 s⁻¹) | 950 to 1,400 mPa·s (cP) |
| Flash Point | See SDS |
LOCTITE 443 Guide for Thin Bond-Gap Assembly Work
Correct surface preparation and bond-gap control are essential for getting reliable results from this adhesive. The documented directions for use are as follows:
- For best performance, bond surfaces should be clean and free from grease before application.
- This product performs best in thin bond gaps of approximately 0.05 mm.
- Excess adhesive can be dissolved with Loctite cleanup solvents, nitromethane, or acetone.
Viscosity and Flow Behavior
Compared with lower-viscosity instant adhesives, this product has a higher Cone & Plate viscosity of 950 to 1,400 mPa·s, which gives assemblers more control over flow on vertical or angled surfaces and reduces the risk of the adhesive running off the bond line before it sets. Its low vapor pressure of under 1 hPa also limits fogging or frosting on nearby surfaces during application, which matters for assemblies with visible or optical components nearby. Buyers comparing instant adhesives for a specific job should weigh this higher viscosity against faster-flowing options depending on the geometry of the parts being bonded.
Why Consistent Sourcing Matters
Composite fabricators and assemblers who use this adhesive across multiple production runs benefit from consistent viscosity and cure speed batch to batch. Variation in these properties can affect how predictably an instant adhesive performs on the line, which is why buyers sourcing this product for repeat use should confirm supply continuity with their supplier before committing to large orders.
Where to Source LOCTITE 443
Thousands Technology provides supply chain resource support for recommended international brand products, including LOCTITE 443, alongside a broader range of auxiliary agents and adhesive products for composite and industrial assembly applications. For adhesive performance standards and test methods referenced across the industry, buyers can review the applicable ASTM standards for adhesives and sealants.
Choosing Between Fast-Bonding and Structural Adhesives
Buyers evaluating instant adhesives alongside resin-based bonding systems should weigh cure speed against long-term load requirements. LOCTITE 443 is suited to fixturing, tacking, and light-duty bonding where fast handling strength and controlled flow matter more than high-temperature or high-load performance. For structural joints subject to sustained mechanical or thermal stress, a two-component epoxy or a dedicated structural adhesive is typically a better fit than an instant cyanoacrylate. Matching the adhesive family to the application reduces the risk of premature bond failure in service.
Documentation
Safety data, flash point details, and handling precautions are provided in the manufacturer’s SDS. Buyers should request the current SDS and technical data sheet before finalizing an order to confirm the specification matches their application.
FAQ: LOCTITE 443
What is LOCTITE 443 used for?
It is used as an instant cyanoacrylate adhesive for fast bonding in thin bond-gap applications.
How does LOCTITE 443 compare in viscosity to other instant adhesives?
It has a higher Cone & Plate viscosity of 950 to 1,400 mPa·s, giving more controlled flow than lower-viscosity grades.
What bond gap does LOCTITE 443 work best with?
It performs best in thin bond gaps of approximately 0.05 mm.
How is excess adhesive removed?
It can be dissolved with Loctite cleanup solvents, nitromethane, or acetone.
For pricing, SDS documentation, or supply chain support for LOCTITE 443, contact Thousands Technology’s sourcing team to discuss your project requirements.
