QTS Flexible 45A Rubber-Like Elastic Resin (Black) - Made in Taiwan, Shore 45A mimics TPE/TPU, high rebound, tear strength 1.24 KN/m. Matte black rubber finish, no EU-banned TPO photoinitiator. Perfect for silicone buttons, anti-slip pads, RC tires, shock absorbers. Compatible with all 405nm LCD/DLP

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🏆 QTS Technology — Taiwan's Leading Materials Science Brand

30+Years Chemical Background

15+Years 3D Printing Experience

8000+Taiwan Customers

100%Made in Taiwan

QTS Technology has over 30 years of chemical R&D background, with 15+ years dedicated to 3D printing materials. Our R&D team continuously pushes the boundaries of materials science, providing 8000+ Taiwan customers with the highest quality 3D printing solutions. Every QTS resin is developed, manufactured, and quality-controlled locally in Taiwan.

⚫ QTS Flexible 45A Rubber-Like Elastic Resin (Black)

Your Desktop Silicone Parts Factory — Print Functional Black Rubber Parts Without Molds

Shore 45A TPE/TPU-Like Feel High Rebound Matte Black Rubber Finish No EU-Banned TPO Made in Taiwan 405nm Compatible

45A Shore Hardness
TPE/TPU Rubber Feel

1.24 Tear Strength KN/m
Durable & Bend-Resistant

0 TPO No EU-Banned Photoinitiator
Eco-Friendly & Compliant

🔍 QTS Flex Series Hardness Selection Guide

QTS Flex series offers multiple hardness options to meet different application needs:

🟢 Flex 8A

Shore 8A

Ultra-Soft Gel
700% Elongation
Wearables, Medical

🟡 Flex 25A

Shore 25A

Soft Rubber Feel
270~340% Elongation
Buttons, Cushions

⚫ Flexible 45A (This)

Shore 45A

TPE/TPU Rubber Feel
High Rebound
Tires, Seals, Dampers

🔴 Standard Elastic

Shore 50A+

Firmer Elasticity
100~200% Elongation
Industrial Fixtures

💡 Flexible 45A is Perfect for You If You Need:

✅ Silicone buttons or knobs that withstand repeated pressing and quickly rebound
✅ RC car or model car rubber tires with grip and durability
✅ Anti-slip pads, shock absorbers, equipment cushion pads
✅ Seals, pipe fittings, O-ring prototypes
✅ Functional prototypes with professional matte black rubber appearance

✨ Six Core Advantages

🔄

True TPE/TPU Rubber Feel

Shore 45A hardness perfectly mimics TPE/TPU thermoplastic elastomers. Withstands pressing and quickly rebounds, bend-resistant and durable, providing the closest experience to everyday silicone products.

💪

Superior Mechanical Performance

Tensile strength 1.1 MPa, tear strength up to 1.24 KN/m. Ensures reliable durability in dynamic applications, suitable for seals, shock absorbers, and other functional parts.

🌿

No EU-Banned TPO Photoinitiator

This product contains no EU-banned TPO photoinitiator, allowing you to pursue performance while meeting stricter environmental and safety standards. Ideal for products destined for EU markets.

⚫

Deep Matte Black Finish

Opaque black formula delivers an excellent matte black rubber appearance, significantly enhancing the professionalism of your prototypes and the visual quality of final products.

⚡

Optimized Printing Experience

Specially formulated for shorter cure times and higher printing efficiency compared to traditional soft resins. Unique dry-touch formula prevents sticky surfaces, making post-processing much easier.

🏭

Made in Taiwan Quality

100% Taiwan R&D and manufacturing with strict quality control and high batch consistency. QTS Technology's 30+ years of chemical background ensures every batch meets specifications.

🎯 Six Key Application Areas

🔘

Functional Prototype Development

Silicone buttons, knobs, anti-slip pads, soft grips. Perfectly simulates the feel and function of final products, accelerating product development validation.

🚗

Models & RC Vehicles

RC car rubber tires, articulated figure soft joints. High rebound ensures tire grip, tear resistance ensures joints withstand repeated use without breaking.

🛡️

Cushioning & Shock Absorption

Custom shock absorbers, sound dampening materials, equipment cushion pads. Shore 45A provides optimal cushioning to protect precision equipment from impact damage.

🔧

Sealing & Waterproofing

Gaskets, pipe fittings, O-ring prototypes. Elastic material ensures good sealing performance, suitable for functional testing of low-pressure sealing applications.

🏠

Lifestyle & Office Applications

Custom cable sleeves, organizers, protective covers, anti-slip mats. Create personalized rubber accessories without molds, meeting various everyday needs.

🔬

Industrial & R&D Testing

Industrial robot end-effector soft contact surfaces, fixture soft pads, laboratory soft clamping devices. Black appearance suits industrial environments.

📊 Complete Technical Specifications

🧪 Photosensitive Resin Basic Properties (Liquid Material)

Test Item	Value	Notes
Appearance	Flowing Liquid	Opaque Black
Color	Black	Matte Black Rubber Finish
Viscosity @25°C	4000 ~ 6000 cps	Higher than standard resins; adjust lift speed
Volume	500g	—
Compatible Wavelength	395 ~ 405 nm	LCD / DLP / SLA
TPO Photoinitiator	None (EU Compliant)	Meets EU environmental & safety standards

⚙️ Mechanical Properties After Curing

Test Item	Test Method	Value
Shore Hardness A	ASTM D2240	45 A
Tensile Strength MPa	ASTM D638	1.1 MPa
Tear Strength KN/m	ASTM D624	1.24 KN/m
Technology Type	—	LCD / DLP / SLA

⚠️ High Viscosity Resin Printing Notes

Flexible 45A viscosity is 4000~6000 cps, significantly higher than standard hard resins (typically 150~500 cps). High viscosity may increase peel force. Recommendations:
• Use FEP/nFEP release film (avoid ACF film)
• Reduce lift speed appropriately
• Ensure resin temperature is above 25°C (pre-warm in winter)
• For first use, print a small test piece first

⚙️ Recommended Exposure Parameters

Printer Model	Screen Type	Bottom Layer Exposure	Normal Layer Exposure	Layer Height
Phrozen Make	Color-LCD	30 ~ 40 sec	8 ~ 12 sec	50 µm
Phrozen Sonic mini	Mono-LCD	20 ~ 30 sec	5 ~ 8 sec	50 µm
Miicraft 125 DLP	DLP	8 ~ 12 sec	1.5 ~ 2.5 sec	50 µm

💡 Elastic Resin Parameter Adjustment Tips:
• Poor bed adhesion: Increase bottom layer exposure by 5~10 seconds
• Product too hard, losing elasticity: Reduce normal layer exposure by 1~2 seconds
• Unclear details: Try reducing layer height to 25~35 µm
• Post-cure time: 10~60 minutes depending on model thickness (over-curing will harden the product)
• High viscosity note: Reduce lift speed to avoid excessive peel force causing print failure

📋 Usage Steps (5 Steps to Complete)

Shake Well

Gently shake bottle for 30 seconds before use to mix thoroughly

Set Parameters

Set recommended exposure time per printer model, reduce lift speed for high viscosity

Print Complete

Gently remove model after printing, avoid excessive force

IPA Wash

Wash with 95% IPA alcohol for 30~60 seconds to remove residual resin

UV Post-Cure

365~405nm UV light box for 10~60 minutes (avoid over-curing)

✅ Dry-Touch Formula Advantage

QTS Flexible 45A uses a unique dry-touch formula. After post-curing, the model surface remains non-sticky and ready to use without additional treatment. This is a significant advantage over other brand elastic resins, greatly improving the user experience.

🖨️ Compatible Printers

QTS Flexible 45A is compatible with all 395~405nm LCD/DLP/SLA 3D printers, including but not limited to:

Brand	Compatible Models	Screen Type
Phrozen	Make, Sonic mini, Sonic 4K, Sonic XL, Mighty 8K	Color-LCD / Mono-LCD
Anycubic	Photon Mono, Photon M3, Photon M5, Photon Ultra	Mono-LCD / DLP
Elegoo	Mars 3, Mars 4, Saturn 3, Saturn 4 Ultra	Mono-LCD
Creality	Halot-One, Halot-Sky, Halot-Max	Mono-LCD
FlashForge	Foto 8.9S, Foto 13.3	Mono-LCD
Miicraft	125, BullDog, Ultra	DLP

🏆 QTS Flexible 45A vs Traditional Silicone Molding vs Competitors

Comparison Item	QTS Flexible 45A (3D Printing)	Traditional Silicone Molding	Standard Elastic Resin
Development Time	✅ Hours	❌ Weeks to Months	✅ Hours
Mold Cost	✅ No Mold Required	❌ High Mold Costs	✅ No Mold Required
Complex Structures	✅ Complex Internal Structures	❌ Limited by Draft Angles	✅ Complex Structures
Surface Dry-Touch	✅ Dry, Non-Sticky	✅ Dry	❌ Often Sticky
TPO Compliance	✅ No EU-Banned TPO	✅ Not Applicable	❌ Most Contain TPO
Design Modification	✅ Instant, No Extra Cost	❌ New Mold Required	✅ Instant Modification
Small Batch Production	✅ From 1 Piece, Flexible	❌ Minimum Order Required	✅ From 1 Piece

❓ Frequently Asked Questions

Q: What's the difference between Flexible 45A and Flex 25A? Which should I choose?

A: The main difference is hardness and application. Flex 25A (Shore 25A) is softer with 270~340% elongation, ideal for buttons, cushion pads, and wristbands needing soft touch. Flexible 45A (Shore 45A) is firmer with TPE/TPU-like rubber feel and higher tear strength (1.24 KN/m), better suited for RC tires, seals, shock absorbers requiring durability.

Q: Why is Flexible 45A's viscosity higher? Will this affect printing?

A: Flexible 45A viscosity is 4000~6000 cps, higher than standard hard resins (150~500 cps). High viscosity is a characteristic of elastic resin formulas and may increase peel force. Use FEP/nFEP release film, reduce lift speed, and ensure resin temperature is above 25°C. With correct settings, print success rate is very high.

Q: What are the practical benefits of no TPO photoinitiator?

A: TPO is a substance of very high concern (SVHC) under EU REACH regulations with potential harm to humans and environment. QTS Flexible 45A without TPO means: (1) Compliant with EU export standards; (2) Safer for operators; (3) Suitable for customers and enterprises with environmental requirements.

Q: How long should post-cure time be?

A: Recommended 10~60 minutes depending on model thickness. Thin parts (1~3mm): 10~20 minutes; thick parts (5mm+): up to 30~60 minutes. Note: Over-curing (more than 60 minutes) will gradually harden the product, losing elastic properties. Start with 15 minutes and adjust based on finished product elasticity.

Q: Can Flexible 45A be used to make seals?

A: It can be used for prototype testing and low-pressure sealing applications. Shore 45A hardness and 1.24 KN/m tear strength provide good sealing performance. Note that 3D printed seals may have layer lines; for high-pressure or demanding sealing applications, functional testing is recommended first.

Q: Does black resin require adjusted exposure times?

A: Yes, black pigment absorbs some UV light and may require slightly longer exposure than transparent resins. Start with middle-to-high values within the provided parameter range, then fine-tune based on actual print results.

Q: What is the shelf life of this resin?

A: Stored sealed, away from light, at 15~35°C, the shelf life is 12 months. After opening, use within 6 months for best results. Always ensure the cap is tightly sealed after use.

Q: How should waste resin be disposed of?

A: Never pour liquid resin directly down the drain. Fully cure waste resin into solid form before disposing as general recyclable waste. IPA alcohol used for washing also requires proper disposal and should not be poured into drains.

🏆 Why Choose QTS Technology?

🧪 30+ Years Chemical R&D Background

Deep chemical science foundation ensures precision and stability in every resin formula. We're not just selling resin — we're materials science researchers.

🏭 Made in Taiwan

100% Taiwan R&D and manufacturing with strict quality control and high batch consistency. Supporting Taiwan manufacturing with fast local service response.

👥 8000+ Taiwan Customers Trust Us

The long-term choice of over 8000 Taiwan customers, spanning schools, enterprises, research institutions, and individual creators. Reputation built on real user experiences.

🔧 Professional Technical Support

Complete printing parameter recommendations and troubleshooting services. Whenever you encounter technical issues, the QTS technical team is ready to support you.

💎 Strict Quality Control

Every batch of resin undergoes rigorous quality testing before shipping, ensuring hardness, elasticity, and curing characteristics meet standard specifications.

🧾 Transparent & Worry-Free Shopping

All products are tax-inclusive. Official receipts provided with every shipment for easy expense reporting. Corporate procurement made simple.

⚫ Experience QTS Flexible 45A Rubber-Like Elastic Resin Now

Shore 45A Rubber Feel × High Rebound & Tear-Resistant × Matte Black Professional Finish × No TPO
Made in Taiwan, Quality Guaranteed, Technical Support Always Ready

🛒 Buy Now 📧 Technical Inquiry

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