Flexible Resin Options Reviewed: 6 Top Picks Across Shore Hardness

Flexible resin sits in a narrow band of the material spectrum , soft enough to bend and absorb impact, precise enough to hold fine detail through a 405nm cure. Getting that balance right in a formulation is harder than it looks, and the options available now vary considerably in shore hardness, rebound speed, and intended application. This overview covers six options across that range, from ultra-soft silicone simulators to tougher impact-resistant blends.

The picks here draw from spec sheets, owner threads on r/3Dprinting, and community consensus on real-world print behavior. For broader context on resin materials and printer compatibility, the Resin hub covers the full category. The sections below focus specifically on flexible and semi-flexible formulations.

Top Picks

Siraya Tech Tenacious Flex

Siraya Tech Tenacious Flex is the option with the most established track record among the picks here. The Tenacious line has been a community reference point for flexible resin for a while , owner reports consistently mention fast rebound and real impact resistance rather than just marketing language around those terms.

The 405nm cure wavelength means this runs on essentially any MSLA or DLP printer without wavelength compatibility concerns. Owners note the calibration process matters more than with rigid resins , exposure time and lift speed adjustments are worth dialing in before committing to a long print. The payoff is a flexible print that holds shape under repeated stress rather than developing micro-tears at stress points.

For functional parts , gaskets, wearable components, snap-fit assemblies , this is the first option worth evaluating in the flexible category. Owner consensus on r/3Dprinting points to it as a baseline reference for what flexible resin should do under load.

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Superflex 3D Printer Resin, Softness 80A

Superflex 3D Printer Resin targets an 80A Shore hardness , roughly in the range of a firm rubber band or a soft automotive seal. That puts it softer than semi-flex resins but noticeably firmer than the silicone-range options. The 500g quantity is practical: flexible resin runs through faster than people expect when dialing in settings, and having extra material for calibration prints matters.

The clear formulation is worth noting for applications where light transmission or interior visibility is useful , enclosures with indicator lights, translucent gaskets, or decorative components where opacity would be a drawback. Owners report that cure times run longer than with standard rigid resin, which tracks with most flexible formulations , the polymer network needs more energy to fully cross-link without becoming brittle.

Made in Korea by 3DMaterials, this sits in the mid-range tier for flexible resin. For a buyer who needs reliable 80A softness and appreciates a domestic-to-Korea quality control standard, spec sheets and owner reports both support it as a consistent performer.

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SuperElastic 3D Printer Resin, Softness 60A

Drop the shore hardness another 20 points and you’re in different territory. SuperElastic 3D Printer Resin at 60A is genuinely soft , the manufacturer’s silicone comparison is accurate in feel if not in chemistry. Owner reports describe prints that compress and recover rather than deform and hold, which is the key distinction at this hardness level.

Also 500g and clear from 3DMaterials, this pairs directly with the 80A Superflex as a two-tier system if a build requires different hardness zones. Post-processing at 60A requires care , over-washing in IPA or extended UV exposure after cure can affect elasticity, sometimes significantly. Community reports on flexible resin post-processing suggest shorter wash cycles and conservative additional cure times as a starting point.

The application fit here is tight: soft grips, flexible covers, wearable props, or any part where the material needs to compress substantially under moderate hand pressure. Not the right pick for load-bearing or snap-fit use cases.

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ANYCUBIC BJD Wear-Resistant 3D Printer Resin

This is a purpose-built formulation, and the brief makes that clear: ANYCUBIC BJD Wear-Resistant 3D Printer Resin is designed for ball-jointed doll construction. Flexible joints in BJD builds fail in specific ways , wear at contact points, cracking under repeated articulation, discoloration at stress zones , and ANYCUBIC has targeted each of those failure modes in the spec.

Anti-impact flexibility matters in joint applications because the stress profile is cyclic rather than static. A gasket sees one load direction; a BJD joint rotates and compresses repeatedly across its range of motion. Wear resistance addresses the surface degradation that occurs at those contact points over time. Owner reports from the BJD community note the skin-tone formulation options as a genuine differentiator , finishing BJD parts in standard resin colors and then painting is workable, but skin-compatible base colors reduce finishing labor considerably.

Outside BJD construction, the case for this formulation weakens , it’s a specialized product at a price point that reflects that specialization. For BJD makers, it’s the most directly matched option in this lineup.

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LET’S RESIN UV Resin Soft Type

LET’S RESIN UV Resin Soft Type occupies a different segment than the other picks here. At 100g, this is not a production resin for running builds on a dedicated resin printer , it’s a UV-cure formulation aimed at small craft projects, jewelry, and mixed-media applications where a flexible, optically clear result matters.

The low-shrinkage claim is the technically meaningful differentiator. Shrinkage during UV cure is one of the primary causes of dimensional inaccuracy and warping in resin projects, and a formulation that manages shrinkage well produces parts that match the intended dimensions more closely. Owners note the clarity is good , deep pours stay transparent rather than yellowing at the edges.

The UV lamp requirement is worth flagging explicitly: this requires a dedicated UV source, not just ambient light, and that tool is not included. For buyers already running a UV lamp in a craft setup, that’s a non-issue. For buyers expecting a self-contained kit, the lamp is an additional purchase. At the 100g quantity, this is a starter or supplemental material rather than a primary build resin.

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ANYCUBIC Tough Resin 2.0

ANYCUBIC Tough Resin 2.0 is the outlier in this lineup. The other five are flexible or elastomeric formulations; this is a rigid toughened resin. It belongs here as a practical counterpoint , flexible resin is not always the right answer for impact resistance, and understanding where Tough Resin 2.0 fits clarifies when flexibility is actually the requirement versus when toughness in a rigid form is the better solution.

The 365, 405nm dual-wavelength compatibility and fast cure cycle are the headline specs. Owner reports confirm the improved toughness over standard ANYCUBIC resin, and high-precision detail retention is documented in community print benchmarks. For structural parts, brackets, enclosures, and anything requiring dimensional stability under load, the rigid tough formulation outperforms flexible options , flexible resins deform under sustained load in ways that rigid materials don’t.

The ventilation and safety note in the specs is accurate and worth taking seriously. All resin printing requires proper workspace ventilation and nitrile gloves, but tougher formulations with modified chemistry warrant the same disciplined handling as any photopolymer.

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Buying Guide

Shore Hardness and What It Actually Means

Shore hardness is the most useful single number for comparing flexible resins. The A scale runs from 0 (essentially liquid-soft) to 100A (hard rubber). The two 3DMaterials options here , 60A and 80A , cover the practical range for most flexible printing applications. At 60A, a print compresses noticeably under hand pressure and rebounds. At 80A, there’s meaningful resistance, similar to a firm rubber eraser.

Matching shore hardness to the application is the first design decision. Grips, wearables, and cushioning parts typically work in the 40, 70A range. Gaskets, seals, and snap-fits that need some flex but must hold shape under load usually want 75, 90A. Going softer than the application requires creates parts that deform unintentionally; going too firm produces parts that crack rather than flex.

Functional Flexibility vs. Elastomeric Flexibility

Not all flexible resins flex in the same way. Some formulations stretch and return , true elastomeric behavior. Others bend without cracking but don’t have meaningful rebound or stretch. The distinction matters for application design.

Siraya Tech Tenacious Flex and the 3DMaterials SuperElastic both target true elastomeric behavior , stretch and recover. The ANYCUBIC BJD resin is more in the anti-impact flexible category, designed to absorb stress at joints rather than stretch across the whole part. Knowing which behavior the application needs prevents mismatched material choices. Owner threads on r/3Dprinting are a reliable source for real deformation and recovery reports , spec sheets describe the formulation, but owners describe how parts actually behave.

Post-Processing Flexible Resin

Post-processing is where flexible resin prints fail most often, and the failure mode is usually over-processing. IPA washing removes uncured resin from the surface, but extended exposure to IPA degrades elastomeric properties , flexible prints should run shorter wash cycles than rigid ones, typically 30, 60 seconds in agitated IPA rather than the 2, 3 minutes common with standard resin.

Additional UV curing after the initial cure cycle is similarly sensitive. Over-curing flexible resin crosslinks the polymer network too densely, which reduces elasticity and can make prints brittle. Starting with conservative additional cure times , 1, 2 minutes under a UV station , and testing flexibility before extending is the recommended approach from community consensus. The goal is full surface cure without degrading the bulk material properties.

Printer Compatibility and Settings

Flexible resin settings diverge from standard resin profiles in two important ways: exposure time and lift speed. Flexible formulations generally need longer base layer exposure to adhere properly to the FEP or nACE release film, but shorter per-layer exposure times in the body of the print to avoid overcuring. Lift speed matters more with flexible materials , too fast, and the suction force during peel can deform a flexible print that hasn’t fully cured.

Most MSLA printers running 405nm , Elegoo Mars series, ANYCUBIC Photon series, Phrozen printers , are compatible with the formulations here that specify 405nm. The LET’S RESIN soft type is not intended for printer use at all; it requires a UV lamp for hand-pouring applications. Checking that the printer’s light source wavelength matches the resin’s specified cure range is a basic pre-purchase step that applies to all photopolymer resins. The resin materials section has additional coverage of wavelength compatibility by printer model.

Safety Handling

All photopolymer resins , flexible or rigid , require the same baseline handling discipline: nitrile gloves, adequate ventilation, and UV-opaque storage. Flexible resins are not materially different from rigid formulations in toxicity profile, but the thinner viscosity common in some flexible formulations makes spills and skin contact easier to overlook. Dedicated resin-handling tools, separated from other workspace equipment, reduce contamination risk. Cured resin is generally inert; uncured resin requires care at every stage from pour to wash.

Frequently Asked Questions

Can flexible resin be printed on any MSLA or DLP printer?

Most flexible resins specify a 405nm cure wavelength, which covers the majority of consumer MSLA printers on the market. The main compatibility variable is exposure settings , flexible resins rarely run on default profiles and need calibration specific to the formulation. Checking the manufacturer’s wavelength specification against the printer’s light source is the required first step. LET’S RESIN Soft Type is the exception here: it’s a hand-pour UV resin, not a printer resin.

What is the difference between 60A and 80A Shore hardness in practice?

At 60A, a print compresses under moderate hand pressure and rebounds with minimal resistance , similar to a soft silicone kitchen tool. At 80A, there’s real resistance to compression, closer to a firm rubber eraser or automotive seal. The 20-point gap is noticeable in hand. For grips and cushioning, 60A is more comfortable; for gaskets and snap-fits that need to hold shape, 80A provides the better mechanical baseline.

Is ANYCUBIC Tough Resin 2.0 a flexible resin?

No , Tough Resin 2.0 is a toughened rigid resin, not a flexible or elastomeric formulation. It’s included in this lineup because impact resistance and flexible resin are often conflated as requirements, and the distinction matters for part design. If the application requires dimensional stability under sustained load, a rigid tough resin is the stronger choice. If the application requires actual deformation and recovery, a flexible formulation is required , and Tough Resin 2.0 won’t provide that.

How do I prevent flexible resin prints from losing elasticity after curing?

Over-washing and over-curing are the two most common causes. IPA wash cycles for flexible resin should be shorter than for rigid resin , aim for 30, 60 seconds in agitated IPA and inspect the surface rather than running a full standard cycle. Post-cure UV exposure should start conservative, around 1, 2 minutes, with flexibility tested before extending. Community consensus on r/3Dprinting consistently identifies over-processing as the primary failure mode for elastomeric resin prints.

Is the ANYCUBIC BJD resin suitable for non-BJD flexible applications?

The BJD resin is formulated specifically for the cyclic stress profile of jointed doll construction , wear resistance at contact points and repeated articulation. For other flexible applications, that specialization doesn’t add value and the price reflects the specialized formulation. General-purpose flexible resins like Siraya Tech Tenacious Flex or the 3DMaterials options are more appropriate for gaskets, grips, and functional parts where BJD-specific properties aren’t relevant.