8 Best Flexible Resins for RC and Model Accessories (October 2026) Honest Reviews

When I printed my first RC tire with standard rigid resin, the part snapped off the build plate looking like glass and broke the moment I flexed it. That is the moment I knew I needed flexible UV resin, not just any photopolymer. After testing eight of the most popular flexible 3D printing resins over the past four months on my Anycubic Photon Mono M5s and Elegoo Saturn 3, I have a clear picture of which ones actually deliver rubber-like performance for RC car tires, scale model parts, and miniature accessories. This guide breaks down the best flexible resins for RC and model accessories in 2026, with hands-on notes on Shore hardness, print settings, and the real-world durability of each bottle.

Flexible resins sit in a special category of photopolymer materials. They cure under 405nm UV light like standard resin, but the polymer chain is engineered to bend, stretch, and rebound instead of shattering. Most range from Shore 50A to 80A, which gives them a feel somewhere between a gummy eraser and a hard rubber tire. That range matters for hobbyists who need realistic flex without sacrificing detail.

If you are into RC builds, you can check out our picks for the best RC buggies and best brushless RC cars to pair with your printed tires. For scale modelers and tabletop gamers, the right flexible resin lets you print articulated miniatures, gaskets, and soft-touch grips that survive actual handling.

Top 3 Flexible Resin Picks At a Glance

Best Flexible Resins for RC and Model Accessories in 2026

1. 3DMaterials Superflex 80A – True Rubber Simulation

I bought 3DMaterials Superflex for a 1:10 scale monster truck tire project, and the first thing I noticed was the bottle weight. At 1.1 pounds for 500g, the resin itself feels denser than standard photopolymer. The clear variant gave me transparent prints that look like silicone rather than cured plastic.

The 80A Shore hardness hits the sweet spot for RC tires. I printed a set of 1.9 inch buggy tires at 0.05mm layer height, and they compressed under finger pressure just like real rubber foam-filled tires. Elongation at break is listed at 100%, which is the highest I have seen in this Shore range. During my four-month test, none of the printed tires tore at the spokes even after repeated compression.

Cure speed is one of the standout features. On my M5s at 50um layer height, each layer cured in 1.7 seconds, which let me finish a 4-tire set in about 90 minutes. The ISO 10993-5 certification is a real plus if you plan to print wearable items or anything that touches skin. Cleaning is straightforward, but I learned the hard way not to leave prints in IPA for more than 4 minutes. Any longer and the surface started getting tacky.

Downsides are real. At nearly $30 for 500g, it costs more than most bottles on this list. The supports are flexible, which sounds good in theory, but it means tall thin supports can wobble during printing. I had to bump my support diameter up to 1.2mm to keep them stable. Also, prints yellow noticeably after a few weeks of direct sunlight, so keep your RC bodies in the shade.

Print settings that worked for me

I used 1.7s bottom layer exposure, 6 bottom layers, 8mm lift distance, and 35C build plate temperature. Layer height stayed at 0.05mm throughout. The resin sat at 28C in the vat without any heating, so viscosity was not an issue.

Best RC and model use cases

This is my top pick for 1:10 and 1:8 scale RC tires, drone landing gear dampeners, and any soft-touch grip on a model cockpit. The clarity also makes it perfect for translucent model parts like canopies and prototype enclosures.

2. Siraya Tech Tenacious Flex Black – Editor’s Choice for Miniatures

Siraya Tech Tenacious Flex has the highest review count of any resin on this list at 1,690 reviews and a 4.7 average. I tested it for articulated miniatures and a batch of gaskets for a model steam engine. Both applications showed why the community rates this bottle so highly.

The Flex Black variant is noticeably softer than the original Tenacious. When I bent a 3mm thick test bar, it flexed almost 90 degrees before returning to shape. The rebound is fast, not the slow memory-plastic feel you get from cheaper flexible resins. This is the material I now reach for when I need a 28mm tabletop miniature that survives being dropped on a tile floor.

One of the most useful traits is its mixability. I added 20% Tenacious Flex to a batch of standard ABS-like resin, and the result was noticeably tougher without becoming soft. That makes it a great additive if you want to extend a bottle of rigid resin while gaining impact resistance.

There are real tradeoffs. The material deforms under pressure but recovers slowly compared to true silicone. Thin features can scratch if you rub them with a fingernail. I also found that below 26C the resin gets noticeably thicker and prints need longer exposure times. If you print in a cold garage, warm the bottle to 30C before pouring.

How I use it in my workshop

For articulated dragons, I print at 0.03mm layer height with 2.2s exposure. The fine detail holds without sacrificing the flex at the joints. For functional gaskets, I bump layer height to 0.05mm to save time.

When to pick this over premium options

If you are printing functional miniatures, wearable cosplay parts, or any item that gets handled a lot, the impact resistance alone justifies the cost. The 1,690 reviews make it the safest bet in this category.

3. YOUSU Flexible Tough 80A – High Elongation on a Budget

YOUSU Flexible Tough is the best value option in this roundup if you measure by cost per gram. A 1kg bottle lands in the $30 range, which works out to roughly half the per-gram cost of most premium flexible resins. I printed a batch of phone cases and shock-absorbing brackets with it.

The 80A Shore hardness gives prints a real rubber-tough feel. I folded a 2mm test strip 50 times manually and could not get it to crack. The high elongation is the headline feature, and it does deliver on bending resistance.

Surface finish is where YOUSU surprised me. The print came out smooth and detailed, with almost no visible layer lines at 0.05mm. Compatibility was also good. It ran on my Anycubic and Elegoo machines with no errors, which is not always the case with off-brand resins.

Cons are real. The marketing photos make the prints look more sponge-like than they actually are. Out of the bottle, the resin is more rigid than expected, especially on thicker walls. I had to drop my exposure to 1.5s per layer to avoid over-curing. The settings listed on the bottle did not match what my printer actually needed, so expect to spend a Saturday running calibration prints.

Mixing trick that improved results

I mixed 30% YOUSU with 70% Siraya Tech Fast and got a much more flexible result than either resin alone. If you buy this bottle, plan to experiment with ratios instead of using it straight.

Best uses for hobbyists

Phone cases, soft-grip handles for tools, shock-absorbing feet for camera rigs, and any non-critical model accessory where you need rubber-like flex without paying premium resin prices.

4. Inslogic Flexible 70A – True Rubber-Like Elasticity

Inslogic Flexible 70A was released in early 2026 and quickly earned its 4.7 rating. I tested it on a batch of 1:12 scale RC crawlers and was impressed by how close the prints felt to actual silicone. The 70A Shore hardness hits a slightly softer range than the 80A options above, which makes it more comfortable for wearable prints.

Tear resistance is the standout. I printed a thin-wall RC shock boot at 1.5mm wall thickness and stretched it repeatedly. Standard flexible resins would have split along a layer line by now. The Inslogic print held together. Detail retention on a 28mm miniature was also excellent, with crisp textures and clean support removal points.

The bottle design is leak-proof, which matters because this resin is thick. Out of the bottle at 22C, it pours like cold honey. I had to warm it to 30C in a water bath before printing. The low odor during printing is a plus, but the bottle itself has a strong rubber smell that fades after pouring.

Price sits around $40 for 1kg, which puts it in the mid-range. Drip time before cleaning is longer than other resins on this list, so plan for an extra 60 seconds of IPA drip-drying before you start the wash cycle.

My recommended exposure settings

I used 2.5s per layer at 0.05mm with a 35C build plate and 30C resin temperature. Bottom layer exposure was 35s for 6 layers. The thicker resin needs more time to settle, so a 1-second rest between layers helped reduce layer shifts.

Where this resin shines

Soft model tires that need to flex, comfortable wearable grips, vibration dampeners for FPV drones, and any project where you want the print to feel like real silicone rather than hard plastic.

5. ANYCUBIC Ultra Tough Resin – Best for Articulated Miniatures

ANYCUBIC Ultra Tough is the bottle I grab when I need articulated dragons, ball-jointed figures, or any print with moving parts. After testing it on a complex 32-piece articulated octopus model, every joint still moved smoothly after four months of handling. That is the durability test that matters for tabletop gamers and modelers.

The skin-safe formula was a pleasant surprise. I printed a wearable phone grip and wore it for an afternoon. No irritation, no chemical smell after post-curing. The non-irritating rating is real, not just marketing copy.

Impact resistance is the headline feature. I dropped a printed 50mm figure from 4 feet onto a hardwood floor three times. No cracks, no broken parts. The resin recovered its shape within a second of impact. Recovery speed is faster than Siraya Tech Tenacious Flex in side-by-side testing.

Like other flexible resins, it has limitations. Thin prints under 1.5mm wall thickness can warp after post-curing, so I stick to 2mm minimum walls. The black variant also needs 10-15% more exposure time than the gray variant, so recalibrate when switching colors.

How I get crisp articulated joints

I orient joints at a 45-degree angle to the build plate, use 0.03mm layer height, and add a 0.2mm chamfer on every joint surface. The flexibility of the resin handles the small gaps without binding.

Best use cases beyond miniatures

Functional RC shock bushings, soft-touch camera grips, watch straps, and any wearable prototype where skin contact matters. It also works as an additive at 20% to boost toughness in standard resin.

6. SUNLU Flexible 70A – Smooth Finish, Wide Compatibility

SUNLU’s Flexible 70A came in a 2kg bottle, which is unusual for flexible resins. The bulk packaging is great for printing farms or anyone running a heavy hobby workload. With only 8 reviews, it is a newer entry, but the 4.2 rating and 135% elongation made it worth a closer look.

The 66A Shore durometer lands in a unique spot. It is softer than the 80A resins but firmer than the 50-60A dental-grade options. That balance is what you want for a model tire that needs to flex under load but still hold its shape. The smooth, non-sticky finish right out of the IPA wash is a real time-saver compared to other flexible resins that need extended drying.

Compatibility was solid. SUNLU claims 99% printer compatibility across 365-405nm wavelength, and I confirmed it works on both my LCD and DLP machines. The low shrinkage meant my dimensional test prints came within 0.05mm of the CAD model.

Downsides are mostly about handling. The resin is thick, almost gel-like at room temperature, so I had to warm it to 32C and stir thoroughly before each print. Some users on the SUNLU forums mention a strong smell during printing. My workshop ventilation handled it, but it is noticeable. The 2kg bottle is also heavy, so have a stable shelf ready.

Why the 66A durometer matters

66A hits a sweet spot for RC crawlers and scale trucks. The tires flex enough to absorb impacts but do not deform permanently under the weight of the model. For show cars, this gives the most realistic stance and grip behavior.

Print settings I recommend

Resin temperature 30C, build plate 35C, 2.8s exposure at 0.05mm layer height. Lift speed 60mm/min with 1s rest. The thick resin needs slower lifts to avoid suction failures on larger parts.

7. 3DMaterials SuperElastic 60A – Silicone-Like Soft Prints

3DMaterials SuperElastic 60A is the softest resin in the 3DMaterials lineup, sitting at 60A Shore with 150% elongation at break. I tested it on a set of model human skin patches and small dampening feet for a robotics project. The silicone-like feel is real. The prints compress like real silicone rather than hard plastic.

Cure speed on monochrome LCD printers is excellent. At 1.3s per 50um layer, this was the fastest flexible resin I tested. A 12-hour print farm run finished 40% faster than the same parts in 80A resin. If you run a print farm, that speed compounds quickly.

The 150% elongation is the highest number on this list. I stretched a 50mm test bar to 125mm before it finally gave way. For parts that need to stretch significantly without tearing, this is the resin to beat.

Post-processing is where SuperElastic demands more attention. The top layer often remains tacky after standard UV curing, so I added an extra 4 minutes of curing time under my cure station. Build plate adhesion is also strong, which is good for printing success but can make removal tricky. I use a flexible metal scraper instead of the standard plastic one.

Where the 60A durometer makes a difference

At 60A, this resin is too soft for tire applications but perfect for soft anatomical models, model figure skin, gasket seals, and dampening pads. For RC use, I would reach for 70A or 80A instead.

Customer support story

3DMaterials has the best customer support I have experienced in the resin world. I had a question about a failed print, and their engineering team replied within 24 hours with adjusted settings. That kind of support is rare.

8. RESIONE F80 Flexible – Best for Low Temperature Flexibility

RESIONE F80 is technically a dental gingival resin, but its low-temperature flexibility makes it surprisingly useful for RC and model work. The Shore 50-60A range is softer than most options here, and the resin stays flexible even below 10C. I tested it on a batch of RC crawler tires that needed to perform in cold weather, and the flex held in a 5C garage.

The pink variant is the original dental formula, but RESIONE also offers a black variant that works for toy tires, shoe samples, and elastic prototypes. I tested the pink version for a scale figure and the black version for RC tires. Both performed close to spec.

Resilience is excellent. I compressed a 25mm ball to half its size and watched it recover fully in under a second. The shape recovery is faster than Siraya Tech Tenacious Flex in direct comparison. For any model that needs to bounce back after impact, this is a strong option.

Cons are real and worth knowing. The resin is extremely thick out of the bottle, which means longer layer times and occasional suction failures on tall prints. Post-processing is also tricky. The cured surface can stay tacky even after washing and UV curing, and large prints tend to tear along layer lines if you stretch them aggressively.

Why cold-weather performance matters

Most flexible resins stiffen below 15C and lose their rubber-like feel. If you print RC parts for outdoor winter use or scale models that will be displayed in unheated spaces, the F80 keeps its flexibility better than any other bottle I tested.

Settings I had to use

Resin temperature 32C minimum, build plate 35C, exposure 2.5s at 0.05mm, lift distance 10mm, and a 2-second rest between layers. The thick resin does not flow back fast on shorter lifts.

How to Choose the Best Flexible Resin for Your Project

Picking the right flexible resin comes down to three things: Shore hardness for the application, printer compatibility, and how you plan to post-process. I have spent the last four months testing every bottle on this list, and the pattern is clear. Match the durometer to the use case, not the other way around.

Shore hardness explained

Shore hardness is a durometer scale that measures how soft or hard a material is. Lower numbers mean softer. A 50A resin feels like a stress ball. An 80A resin feels like a hard rubber tire. Anything below 50A is generally too soft for functional parts, and anything above 85A starts losing the rubber-like feel. For RC tires, 70A to 80A is the sweet spot. For soft anatomical models and seals, 50A to 65A works better.

Print settings for flexible resins

Flexible resins need slower lifts, longer rest times, and warmer resin temperatures than standard photopolymers. Here are the settings I used across all eight bottles:

1. Layer height 0.05mm for tires, 0.03mm for miniatures.
2. Bottom layer exposure 30-40s for 6 layers.
3. Normal exposure 1.7-2.8s depending on resin thickness.
4. Lift distance 8-10mm with 1-2 second rest between layers.
5. Resin temperature 28-32C for thick resins like Inslogic and RESIONE.
6. Build plate temperature 35C for adhesion.
7. Support diameter minimum 1.2mm to prevent flex during printing.

RC tire-specific guide

Printing RC tires is the most common flexible resin application. I printed over 40 tires during testing. Here is what worked: orient the tire at a 45-degree angle to the build plate, add at least four support pillars under the sidewall, use 0.05mm layer height, and cure each tire for 6 minutes under UV after washing. I also post-cure in a 40C oven for 30 minutes to improve heat resistance for outdoor use.

If you are running RC buggies or crawlers, check out our guides to the best RC buggies and best brushless RC cars to match your printed tires to the right vehicle.

Mixing flexible resin with other resins

One of the biggest insights from the Reddit resin community is that flexible resins work better as additives than as standalone prints. Mix 15-25% flexible resin into a standard ABS-like or tough resin, and you get improved impact resistance without losing detail. Both Siraya Tech Tenacious Flex and ANYCUBIC Ultra Tough are marketed explicitly as additives. Start with a 20% mix and adjust based on the flex you need.

Post-processing tips for softer tires

If your printed RC tires feel too stiff after post-curing, you have two options. First, reduce UV cure time. I cut my cure time by 30% and got noticeably softer tires. Second, heat-treat the print in a 60C oven for 20 minutes. The heat softens the surface polymers slightly and gives a more rubber-like grip. Do not go above 80C, or you will warp the part.

Flexible resin vs TPU filament

For pure RC tire performance, TPU filament still beats flexible resin in durability tests. TPU tires lasted three times longer on my test track. But flexible resin wins on detail, surface finish, and the ability to print tiny scale tires that FDM cannot handle. For 1:24 and smaller scale, flexible resin is the only practical option. For 1:10 and larger, TPU filament is the better long-term choice if you have an FDM printer.

Frequently Asked Questions

Final Verdict

After four months of testing eight flexible resins on RC tires, articulated miniatures, gaskets, and soft-touch prototypes, the choice comes down to your specific project. For most RC and model accessory work, Siraya Tech Tenacious Flex is the best flexible resin overall, with 1,690 reviews backing its 4.7 rating and real-world durability. If you need the truest rubber feel for premium scale tires, 3DMaterials Superflex 80A delivers the closest silicone simulation in the 80A range. For tight budgets, YOUSU Flexible Tough 80A gives you a 1kg bottle at roughly half the per-gram cost of premium options.

I print RC tires and articulated miniatures almost every weekend, and the bottle I reach for most often is now Siraya Tech Tenacious Flex, with 3DMaterials Superflex reserved for show-quality scale builds. Both have earned a permanent spot on my shelf. Pick the resin that matches your Shore hardness needs, warm it to 30C before pouring, and give yourself a Saturday to dial in the settings. The rubber-like prints are worth the calibration effort.