A structural bond only has to do two things well: hold under load and reach every surface it’s supposed to reach before it cures. Incure’s Uni-Weld™ 1013 is built around that second requirement as much as the first — a low-viscosity urethane acrylate that flows into tight, precision joints by capillary action rather than requiring a syringe to force it into place, then cures to a tensile bond strength that outperforms most of its own product line.
A Tensile Strength Leader, Not an Elongation Leader
Within Incure’s broader Uni-Weld™ multi-substrate bonder lineup, elongation varies enormously by grade — some formulations stretch past 700% before failure, others stay under 5% for rigid, dimensionally stable joints. Uni-Weld™ 1013 sits in between at 50% elongation, giving a bonded joint enough give to absorb shock and vibration without behaving like a rigid, crack-prone glass line. Where 1013 actually distinguishes itself is tensile strength: 7,100 psi on plastic substrates and 4,100 psi on metal and glass, both figures among the highest in the entire line rather than a middling compromise. The plastic-substrate figure is limited by the substrate’s own fracture point rather than the adhesive’s ceiling, meaning the bond itself is typically stronger than the plastic part being joined — a useful distinction when specifying an adhesive against a material that might fail before the bondline does. That combination — moderate flex, leading tensile strength — makes 1013 a better fit for joints that need to survive mechanical loading in service than for joints whose primary requirement is absorbing continuous flex.
Low Viscosity Built for Wicking Into Precision Joints
At 550 to 1,100 cP, Uni-Weld™ 1013 runs thin enough to wick into narrow gaps and capillary joints under its own flow rather than needing to be packed or dispensed under pressure — a property that matters most on precision assemblies where the bondline is too small or too enclosed to access with a dispensing needle after the parts are mated. Optical fiber splicing is a direct beneficiary: the adhesive draws into the splice point around the fiber rather than requiring the joint to be built around adhesive access. Wearable device assembly sees the same advantage on a different scale, where enclosures and internal components are staked together in gaps too tight for conventional bead dispensing. Combined with the line’s characteristically fast UV cure, that wicking behavior reduces cycle time on high-throughput precision assembly lines where a bead-and-clamp process would otherwise bottleneck the line.
Email Us with your joint geometry and substrate pairing, and Incure’s engineers can confirm whether Uni-Weld™ 1013 fits your assembly process.
Mixed-Substrate and Wide-Temperature Service
Rated from −55°C to 80°C, Uni-Weld™ 1013 spans cold-storage and outdoor-exposure conditions on one end and elevated ambient or under-hood service on the other, without requiring a substrate-specific reformulation at either extreme. That range matters most on mixed-substrate assemblies — plastic bonded to metal or glass — where the two materials expand and contract at different rates across a thermal cycle. The 50% elongation gives the bondline enough compliance to function as a thermal shock absorber at those transitions, distributing stress across the joint instead of concentrating it at a single point the way a fully rigid adhesive would. The cured matrix also holds up against sustained exposure to industrial solvents and general environmental degradation, so the joint isn’t the first thing to degrade when the surrounding assembly sees routine chemical or outdoor exposure.
Choosing Between 1013, 1013B, and 1013V
Uni-Weld™ 1013’s own product family includes two closely related variants worth knowing about before specifying a grade. Uni-Weld™ 1013B carries identical viscosity, hardness, elongation, and tensile figures to the base grade but is available in black as well as clear, useful where the finished assembly needs an opaque bondline for cosmetic or light-blocking reasons rather than a visible clear joint. Uni-Weld™ 1013V is a clear-only variant with a marginally tighter 45% elongation spec against the base grade’s 50%, otherwise matching viscosity and tensile strength — a distinction narrow enough that substrate compatibility and cure setup, not elongation alone, should usually decide between 1013 and 1013V. All three share the same RoHS and REACH compliance and the same D64–D74 cured hardness, so switching between them for color or minor flex differences doesn’t change the mechanical category of joint they’re suited for.
Where It Fits
Uni-Weld™ 1013 is one grade within Incure’s broader Uni-Weld™ Multi-Substrates Bonder line, which spans viscosities from near-water-thin to heavily thixotropic across nearly twenty grades — worth reviewing if 1013’s viscosity or elongation doesn’t quite match a specific joint design. For bonding to plastic substrates specifically, the sibling Uni-Weld™ Plastic Bonder line covers PC, ABS, and acrylic pairings in more depth. Facilities curing 1013 on small or hard-to-reach joints like fiber splices can also review Incure’s L9000™ UV LED spot lamp line, which pairs a focused light guide with exactly this kind of precision bondline.
Contact Our Team to confirm Uni-Weld™ 1013 for your structural bonding application.
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