Introduction
Thank you for choosing the ISTOYO Premium Resin Mixer Pro. This handheld battery-operated mixer is designed to simplify the process of mixing epoxy resin, pigments, and other viscous liquids for various DIY crafts, resin molds, and silicone mold projects. Its innovative design aims to reduce manual effort, minimize bubbles, and ensure even mixing. Please read this manual carefully before using the product to ensure safe and optimal operation.
Safety Information
- Always wear appropriate personal protective equipment (PPE), such as gloves and eye protection, when working with resin and operating the mixer.
- Keep the mixer and all accessories out of reach of children and pets.
- Do not immerse the main body of the mixer in water or any other liquid.
- Ensure the mixer is turned off before attaching or detaching paddles, or when not in use.
- Use the mixer in a well-ventilated area.
- Do not attempt to mix flammable liquids or substances not intended for this device.
Package Contents
The ISTOYO Premium Resin Mixer Pro package includes:
- 1x Electric Resin Stirrer (Main Unit)
- 4x Reusable Epoxy Resin Paddles
- User Manual

Image: The ISTOYO Premium Resin Mixer Pro main unit with four paddles and other accessories.
Setup
1. Battery Installation
The ISTOYO Premium Resin Mixer Pro requires 4 AAA batteries (not included). To install the batteries:
- Unscrew the bottom cap of the mixer unit.
- Insert 4 AAA batteries, ensuring correct polarity (+/-).
- Screw the bottom cap back on securely.
2. Attaching the Mixing Paddle
Select the appropriate paddle for your mixing needs. To attach a paddle:
- Align the end of the paddle with the opening at the top of the mixer unit.
- Gently push the paddle into the opening until it clicks securely into place. It should fit snugly.

Image: Close-up of the ISTOYO Resin Mixer showing the one-key switch and the paddle attachment point.
Operating Instructions
1. Powering On/Off and Mode Selection
The mixer features a simple one-button operation:
- Press the button once to turn the mixer on.
- Press the button again to switch between clockwise and anti-clockwise rotation modes.
- Press and hold the button to turn the mixer off.
2. Mixing Process
For optimal results and to minimize bubbles:
- Place the paddle into the liquid you intend to mix before turning the mixer on.
- Turn on the mixer and select your desired rotation direction.
- Move the mixer gently through the liquid to ensure thorough and even mixing.
- The mixer is recommended for mixing 4 oz. or 8 oz. of liquid for best results.
- Once mixing is complete, turn off the mixer before removing the paddle from the liquid.

Image: Diagram illustrating the clockwise and anti-clockwise mixing capabilities of the ISTOYO Resin Mixer.

Image: The mixer being used to mix epoxy resin, paint, and pigment, demonstrating its versatility.
Video: Official ISTOYO product video demonstrating the mixer's features and ease of use for various mixing tasks.
Maintenance
Cleaning the Paddles
To ensure the longevity of your mixing paddles and prevent resin buildup:
- Immediately after use, wipe off any excess wet resin from the paddle with a paper towel or cloth.
- Wash the paddles with mild soap and warm water.
- Alternatively, if resin has dried, you can easily peel off the cured epoxy resin from the silicone paddle.
- Ensure paddles are completely dry before storing.

Image: Visual guide on how to clean the mixing paddles after use, showing wiping and peeling off dried resin.
Troubleshooting
- Mixer does not turn on: Check if the 4 AAA batteries are correctly installed and have sufficient charge. Replace with new batteries if necessary.
- Weak motor or slow mixing: Ensure fresh batteries are used. The mixer is designed for specific viscosities; extremely thick liquids may reduce performance.
- Paddle wobbles or falls out: Ensure the paddle is fully inserted and securely clicked into the mixer unit.
- Excessive bubbles during mixing: Ensure the paddle is submerged in the liquid before starting the mixer. Mix at a moderate speed and avoid lifting the paddle out of the liquid while operating.
Specifications
| Brand | ISTOYO |
| Model | B0CB7P6Z6Q |
| Material | Plastic |
| Color | Grey |
| Item Dimensions (L x W x H) | 6.69 x 4.72 x 1.57 inches |
| Power Source | 4 AAA Batteries (not included) |
Warranty
The ISTOYO Premium Resin Mixer Pro comes with a 1-year limited warranty from the date of purchase. This warranty covers manufacturing defects and malfunctions under normal use. It does not cover damage caused by misuse, accident, unauthorized modification, or improper maintenance. Please retain your proof of purchase for warranty claims.
Support
For any questions, technical assistance, or warranty inquiries, please contact ISTOYO customer support through the retailer's platform or visit the official ISTOYO store page.