On multi-material PolyJet platforms equipped with at least three material channels, the specified Stratasys Rigur rubber-like polymer combination is defined in the GrabCAD Print material manager as a digital-material recipe in which TANGOBLACKPLUS FLX980 or TANGOPLUS FLX930 functions as the elastomeric base and VEROCLEAR RGD810 is jetted in metered proportions to raise tensile modulus and tear resistance. The primary resins are commercially designated rubber-like photopolymers with nominal Shore A values of 26–28 when tested according to ASTM D2240-15 or ISO 7619-1:2019; the secondary resin is a rigid transparent PolyJet photopolymer with a Shore D value in the range of 83–86. The combination is not a pre-mixed thermoset but a voxel-level co-jetting product, meaning the final local mechanical response depends on the digital-material ratio, print orientation, layer height, and post-cure conditions.

In production practice, the recipe is run on Stratasys J750, J850 Prime, or J826P platforms with roller-assisted recoating and multi-jet print heads. The main process conflict is viscosity mismatch between the elastomeric Tango resins and the rigid VeroClear resin at the jetting temperature. A viscosity differential between the two resin families requires active jetting temperature control, print head purge cycles, and nozzle plate temperature stabilization after idle periods longer than 60 min to prevent Shore A drift in thin-walled digital-material regions. Published datasheet values for the fully formulated Rigur digital material are limited; the constituent data provided throughout this document are derived from Stratasys material documentation for the named resins.

What Limits Tear Strength and Elongation in Mixed TangoPlus/VeroClear Digital Materials?

The mechanical response of the specified combination is governed by the phase morphology of the acrylate network. TANGOBLACKPLUS FLX980 and TANGOPLUS FLX930 are formulated as low-crosslink-density elastomeric photopolymers; VEROCLEAR RGD810 is formulated as a high-crosslink-density rigid acrylic. When co-jetting at the voxel level, the rigid secondary phase increases the average crosslink density of the cured network, which raises tensile modulus and tear strength while reducing elongation at break. Tear strength measurements under ASTM D624-00(2012) typically improve relative to the neat TangoPlus FLX930 because the rigid VeroClear domains act as crack-arresting heterogeneities. The improvement is not linear with VeroClear content; above a ratio-dependent threshold, the material passes from elastomeric to leathery behavior, and notch sensitivity increases in thin sections.

Elongation at break under ASTM D412-16 is controlled by the molecular weight between crosslinks and the volume fraction of the rigid phase. The neat TangoPlus FLX930 datasheet lists elongation at break in the range of 170–220%; the addition of VeroClear RGD810 reduces this value because the rigid domains restrict chain extension. In manufacturing runs, parts printed with the Rigur recipe can exhibit anisotropic elongation: tensile coupons built in the X-Y plane may retain higher elongation than coupons built along the Z-axis, where layer-interface cure conversion can be lower. The Z-axis differential should be characterized on the specific platform before designing living hinges or snap-fit features that require repeated flexure.

Representative Mechanical Property Ranges for the Constituent Resins

The values in the table are representative published ranges for the named constituent resins and do not represent the cured Rigur combination as a single material. The digital-material ratio is machine-controlled; the combination-specific datasheet should be used for design allowables, particularly for tensile strength and elongation in thin sections.

When VEROCLEAR RGD810 Is Added to the Elastomeric Phase in PolyJet Digital Recipes

The inclusion of VEROCLEAR RGD810 as the secondary resin differentiates this combination from neat TangoPlus FLX930 or TangoBlackPlus FLX980 in three ways. First, the rigid acrylic phase increases the room-temperature Shore A value above the 26–28 baseline of the primary elastomers. Second, the rigid phase reduces surface tack and blocking, which is a practical handling advantage for gaskets and seals stored in compressed stacks. Third, the rigid phase lowers elongation at break and raises the brittle-to-ductile transition in impact-dominated loading. The combination should not be selected as a direct substitute for neat TangoPlus FLX930 in applications that require maximum elongation, such as deep-draw flexible bellows or high-strain stretchable housings.

Compared with Agilus30 FLX935 or Agilus30 FLX930, the specified Tango-based combination represents the earlier-generation elastomeric PolyJet chemistry. Agilus30 datasheets typically report Shore A values of 30–35, tensile strength of 2.4–3.0 MPa, elongation at break of 220–250%, and tear resistance of 4.0–6.0 kg/cm; these values exceed those of neat TangoPlus FLX930 and may be more suitable for repeated-flexure prototypes. However, the Agilus30 family does not use VeroClear RGD810 as a secondary phase in the same digital-material architecture, so the stiffness and dimensional stability of the Rigur combination can be higher at equivalent hardness. This distinction matters when a part must combine soft-touch compliance with snap-fit retention.

Compared with solid VeroClear RGD810, the Rigur combination sacrifices tensile strength, flexural modulus, and heat deflection temperature in exchange for low-durometer deformation and impact energy absorption. VeroClear RGD810 exhibits tensile strength of 50–65 MPa and flexural modulus of 2,100–3,000 MPa; the elastomeric combination will be at least one order of magnitude lower in tensile modulus. The combination is therefore unsuitable for load-bearing rigid enclosures, optical components, or hot components above 45 °C where VeroClear RGD810 itself begins to soften.

The specified Rigur rubber-like combination is specified for functional prototypes of gaskets, seals, soft-touch overmolds, anti-vibration mounts, and snap-fit assemblies where the part must flex during insertion and then recover. Seal performance is evaluated under compression set testing according to ASTM D395-18; users should measure compression set at the service temperature because the Tango-based elastomeric phase exhibits time-dependent viscoelastic recovery. For snap-fit designs, the strain at the snap-fit root should be compared with the elongation at break obtained from ASTM D638-14 or ASTM D412-16 coupons built in the same orientation. Printed parts on J750-class systems at 16 µm high-quality layer height typically show tighter dimensional control than 30 µm high-speed mode for thin sealing lips, while 30 µm mode reduces build time for larger soft-touch housings.

In field data from production-scale multi-material PolyJet lines, the principal failure modes for rubber-like digital materials are not tensile fracture but compression set, interfacial delamination between the elastomeric and rigid phases, and support-material residue in narrow channels. Water-jet support removal with SUP706 is used because the support is softer and more easily removed from elastomeric surfaces than general-purpose SUP705. Removal time should be controlled; prolonged high-pressure water-jet exposure can erode thin elastomeric ribs and alter the as-printed Shore A value at the surface. After support removal, parts are typically conditioned at 20–25 °C and 40–60% RH for at least 24 h before dimensional inspection to allow moisture equilibration and viscoelastic relaxation.

Post-Processing Boundaries Depend on Support Chemistry and Solvent Exposure Limits

PolyJet support material removal for the Rigur combination should follow the platform-specific protocol for elastomeric resins. SUP706 is the recommended support for TangoPlus FLX930 and TangoBlackPlus FLX980 because its lower removal energy reduces tearing of thin elastomeric walls. Heated water-jet equipment operating above 45 °C is not recommended because the elastomeric phase can soften and swell, producing dimensional error in channels and snap-fit features. Solvent exposure should be limited to the cleaning agents documented in the Stratasys safety data sheet; immersion in isopropanol above 70% concentration or in acetone-based cleaners is not recommended because the acrylate network can craze or absorb solvent, leading to delayed hardness recovery.

The uncured liquid resins should not be mixed with amine-containing solvents or additives; the acrylate photopolymer system can undergo uncontrolled crosslinking and exothermic viscosity increase. Material containers should be stored at 10–30 °C and below 70% RH to prevent moisture uptake. Before printing, the operator should confirm that the resin has not reached the expiration date and that the print head plumbing has been purged after material changeovers. In high-humidity production environments above 60% RH, the build chamber and resin cabinet should be conditioned to reduce moisture condensation on the roller and print head; otherwise, the digital-material ratio can shift locally and produce Shore A variation exceeding the normal production tolerance.

The constituent resins are supplied within Stratasys chemical compliance documentation and should be evaluated under REACH and RoHS for the specific production site. The product is not supplied as a food-contact or implantable grade unless specific grade documentation states compliance with FDA 21 CFR or ISO 10993 parts. For medical prototypes that require skin contact or sterilization, users should request the combination-specific biocompatibility data from Stratasys; published data for this specific configuration is limited. Sterilization by autoclave is generally not recommended for Tango-based elastomeric photopolymers because the saturated steam cycle above 121 °C exceeds the heat deflection temperature of both the elastomeric and rigid phases and can produce permanent deformation. Hydrogen peroxide gas plasma at low temperature may be evaluated on a part-specific basis, but repeated cycles can embrittle the elastomeric phase and reduce elongation at break under ASTM D412-16.