3D-ADD ReBond Weld — Self-Repair & Interlayer Welding Additive for photopolymerv 3D Resins

3D-ADD ReBond Weld upgrades photopolymer 3D resins with cure-stress relief, interlayer welding, and post-print self-repair at a controlled activation temperature.

It is a drop-in, reactive liquid with no non-reactive solvents, designed for open-materials printers. It is intended for engineering parts that tend to warp, micro-crack, or split between layers, as well as fixtures, housings, snap-fits, optical and functional parts that benefit from hot-welded joints and longer service life.

Designed for use in open-materials SLA, DLP and LCD workflows at 385–405 nm. Suitable for common photopolymer 3D resin families including rigid-tough, tough-clear and engineering clear systems.

• Engineering parts that tend to warp, micro-crack, or split between layers
• Fixtures
• Housings
• Snap-fits
• Optical and functional parts that benefit from hot-welded joints and longer service life

• Density (25 °C): approx. 0.98–1.12 g·cm⁻³ (ISO 1675)
• Density: 0.90–1.20 g/cm³, depending on formulation and, where applicable, selected version (ISO 1675)
• VOC: none added; reactive medium
• Viscosity: optimized within the processing range required for the intended printing process and application
• Optic activation window: ~75–95 °C, 10–30 min
• Thermal-Weld activation window: ~95–120 °C, 10–20 min
• Starting point: 7–10 wt% in the host resin
• Typical range: 5–15 wt% depending on matrix and goal
• Exposure: expect +5–20% vs your baseline
• Physical state: clear to pale-amber liquid
• Odor: very low (Optic) / low (Thermal-Weld)
• Shelf life: 12 months unopened
• Storage: sealed, 15–25 °C, dry, dark
• Delivery time is around 3-4 weeks after ordering

• Interlayer welding to reduce layer-split failures
• Post-print self-repair to close microcracks after service or finishing
• Cure-stress management to mitigate warpage and micro-cracking during cure
• Optical-friendly Optic variant tuned for clarity and low odor
• Plug-and-play ready to mix additive
• Clear and lightly pigmented systems give the fastest activation
• Optic provides maximum clarity with slightly slower weld vs Thermal-Weld at equal dose
• Thermal-Weld provides fastest, strongest thermal welding for engineering resins and higher-Tg matrices

• Blend under low light and stir until homogeneous
• Temper to 40–50 °C if needed to speed mixing
• Degas before filling the vat
• Print on SLA, DLP and LCD at 385–405 nm
• Increase exposure +5–20% from your baseline and re-optimize base/per-layer times
• Post-cure with your standard protocol
• Avoid excessive over-post-cure if a later hot-weld is planned
• Align the interface or crack surfaces
• Activate within the variant window for 10–30 min with light pressure or a simple clamp
• Optional brief local light assist after heating to lock the interface
• For optics, clean gently and allow 24 h stress relaxation for best clarity
• Dense pigments, heavy filler, or very high-Tg matrices may need higher dosage or temperature
• Please do not expose any 3D resins to natural or room light to prevent their curing.

• Reactive liquid with no non-reactive solvents
• Industrial/R&D use
• Use gloves, goggles and lab coat
• Ventilate
• Consult MSDS before use

Dense pigments, heavy filler, or very high-Tg matrices may need higher dosage or temperature. Validate weld test, crack closure, dimensional drift and optics on internal coupons.

This material is supplied as a professional manufacturing material and is not marketed as a finished medical device. Final part performance and suitability must be validated by the user according to the intended application.

3D-ADD ReBond Weld is supplied as a reactive, drop-in additive for integration into open-materials SLA, DLP and LCD photopolymers. Applications that require a dedicated interlayer-welding, cure-stress-relief or self-repair formulation, or specific mechanical, thermal (high-Tg), optical or processing targets beyond what the additive provides on its own, can be addressed through a custom-designed material.

For these cases, 3Dresyns develops customized resin and additive systems according to customer specifications through the Customization Services program: Customization Services.

Use these related 3Dresyns pages to navigate adjacent material and process routes within the same technical workflow.

• Functional Additives
• Functional modifiers

This technical datasheet should be used together with the relevant processing, calibration, safety and workflow documentation available in the 3Dresyns® Resources section.

Access the 3Dresyns® Technical Resources (IFU, calibration, CRT, post-processing and troubleshooting)