Tec-Bond® 240 secures threaded fasteners to prevent loosening caused by vibration and dynamic loads in demanding environments. A water-based, REACH and RoHS compliant alternative to Tec-Bond® 235 solvent-based thread locker, designed for progressive manufacturing.
Tec-Bond® 240 is a water-based microencapsulated thread adhesive engineered to replace traditional solvent-based chemistry without compromising performance. It is compatible with a wide range of substrates including steel, zinc, and plated surfaces, with Precision Grade variants extending performance to titanium, stainless steel, special alloys, and plastics.
TEC-Bond® 240 may be used as a water-based alternative to solvent-based fastener adhesives such as Tec-Bond 235 as well as 3M® 2353 thread adhesive.
Recommended Performance Temperatures: -40 to 135°C (−40 to 275 °F)
Primary Usage: All types of threaded fasteners
Liquid Shelf Life: 6 months
On Part Shelf Life: 1 year or more from application date
Material Type: Epoxy Chemistry
Medium: Water-Based Formula, Low Odor
Appearance: Standard Color: Sapphire Specialty Colors: Yellow, Green, and more
Viscosity: 200-1000 cPs
K factor (coefficient of friction): 0.19-0.21
Character: Low viscosity liquid- Cures to surface as a dry, thick, ductile deposit
May be used to replace: Solvent-based Tec-Bond 235 and 3M® 2353 thread adhesives
Performance, Advantages and Benefits
Epoxy Chemistry: Delivers reliable high torque with excellent retention and strong resistance to heat, fluids, vibration, and shock, ensuring durable structural bonding.
Advanced Microencapsulation Technology: Provides long shelf life, activation at installation, and reusability, offering convenient, dry-to-the-touch, low-effort use.
Flow-on Coating: Enables controlled application. Viscosity can be adjusted to achieve target coating weights. Provides good adhesion to most fastener finishes, delivering a versatile, hazard-free solution.
What is the difference between Tec-Bond® 240-IN and 240-PR?
The Industrial Grade (240-IN) is suited for general-purpose fastener locking on standard metal substrates. The Precision Grade (240-PR) was developed for small precision assemblies requiring highly defined physical properties or that involve high-tech substrates such as titanium, stainless steel, special alloys, or plastics where enhanced adhesion is required.
How does Tec-Bond® 240 differ from Tec-Bond® 235?
Tec-Bond® 240 is the direct water-based alternative to Tec-Bond® 235. It delivers equivalent locking performance using solvent-free, RoHs and REACH compliant environmentally friendly chemistry, making it suitable for manufacturers transitioning to sustainable processes.
Does Tec-Bond® 240 require primer?
No primer is required for use with the Industrial Grade on standard substrates. The Precision Grade is engineered for passive or challenging substrates without the need for separate primer application.
Can Tec-Bond® 240 be pre-applied to fasteners in bulk?
Yes. Tec-Bond® 240 is available as a pre-applied microencapsulated coating applied at Tectorius service centers. Coated fasteners remain dormant until installation, activating only when the fastener is torqued.
Can Tec-Bond® 240 be pre-applied by hand?
Yes. Tec-Bond® 240-IN is perfect for small runs, saving you from costly machine application. Simply brush or roll the adhesive onto the fastener threads and allow to dry. Once applied, parts have a shelf life of 1 year or more, so you can prepare batches in advance.
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