---
product_id: 46711770
title: "VIVOSUN Durable Waterproof Seedling Heat Mat 3\" x 20\" UL & MET-Certified Heating Pad for Hydroponic, Kombucha Tea, Brewing, Fermentation & Plant Germination"
brand: "vivosun"
price: "€ 30.92"
currency: EUR
in_stock: true
reviews_count: 8
category: "Vivosun"
url: https://www.desertcart.fi/products/46711770-vivosun-durable-waterproof-seedling-heat-mat-3-x-20-ul
store_origin: FI
region: Finland
---

# 6.5W ultra low power draw IP67 waterproof & easy clean 68-86℉ optimal temp range VIVOSUN Durable Waterproof Seedling Heat Mat 3" x 20" UL & MET-Certified Heating Pad for Hydroponic, Kombucha Tea, Brewing, Fermentation & Plant Germination

**Brand:** vivosun
**Price:** € 30.92
**Availability:** ✅ In Stock

## Summary

> 🔥 Grow smarter, not harder — heat your roots, fuel your future!

## Quick Answers

- **What is this?** VIVOSUN Durable Waterproof Seedling Heat Mat 3" x 20" UL & MET-Certified Heating Pad for Hydroponic, Kombucha Tea, Brewing, Fermentation & Plant Germination by vivosun
- **How much does it cost?** € 30.92 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/46711770-vivosun-durable-waterproof-seedling-heat-mat-3-x-20-ul)

## Best For

- vivosun enthusiasts

## Why This Product

- Trusted vivosun brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Precision Heat Control:** Maintains ideal 68-86℉ range for faster germination and propagation.
- • **Energy-Efficient Design:** Runs on just 6.5 watts, saving electricity without compromising performance.
- • **Versatile Multi-Use Mat:** Perfect for seedlings, hydroponics, kombucha brewing, fermentation, and terrariums.
- • **Durable Waterproof Build:** IP67-rated surface resists moisture and allows safe, hassle-free cleaning.
- • **Advanced Far-Infrared Tech:** Soft, uniform heat accelerates growth without scorching roots, enhancing plant vitality.

## Overview

The VIVOSUN Durable Waterproof Seedling Heat Mat is a UL & MET-certified 3" x 20" heating pad designed for professional-grade plant germination and fermentation needs. Operating efficiently at 6.5 watts, it delivers stable far-infrared heat within an optimal 68-86℉ range. Its IP67 waterproof, flexible PVC construction ensures durability and easy maintenance, making it ideal for hydroponics, kombucha brewing, and indoor gardening enthusiasts seeking reliable, energy-saving warmth.

## Description

desertcart.com : VIVOSUN Durable Waterproof Seedling Heat Mat 3" x 20" UL & MET-Certified Heating Pad for Hydroponic, Kombucha Tea, Brewing, Fermentation & Plant Germination : Patio, Lawn & Garden

Review: Works well, heats to 100F - Works well to quickly heat up to 100F.
Review: Perfect for My Gallon Kombucha Jars - I have 3 of these types of strip heating mats. I use them to go around my gallon sized kombucha jars during the winter and they work fine. They keep my fermenting kombucha at just the right temperature. Two of these mats I've had for years and only purchased another one fairly recently. I find them to be very useful and am very pleased with them.

## Features

- Reliable Results: The VIVOSUN professional heat mat maintains optimal temperatures around 68-86℉ (20-30℃), perfect for Seedling start and cutting propagation; Made from durable PVC material, it's designed to last
- Stable & Uniform Heat: The advanced far-infrared heating technology of this heat pad provides your plant with a warm environment to create optimal conditions for speeding up germination and accelerating the growth rate; The strengthened heating film with double insulation layers ensures this durable mat will not scorch the root and can produce plenty of invigorating dew when being used in combination with a humidity dome
- Built to Last: Designed with soft, flexible, and ultra-lasting material, this warming mat goes beyond stringent MET standards; The IP67 rating waterproof surface is easy to clean that enables safe scrubbing; Note: please only use the product indoors and do not immerse it in the water; This product does not specify any expiration date
- Multiple Uses: This 3" x 20" heating pad with a 5.9ft power cord is suitable for glass fermentation jar; It also runs on only 6.5 Watts to help you save on electricity; It can not only use for plant sprouting and other indoor gardening but also for home brewing and terrarium warming, meeting your different daily needs
- Innovative Heating: With the radiate far-infrared light wave, this seedling heat mat makes the heat source softer and provides enough heat, which can be heated up to 40 ℃（104℉）at an ambient temperature of 20-25 ℃（68-77℉）in minutes; We recommend using it with the thermostat controller and humidity dome

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Best Sellers Rank | #61 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #2 in Plant Heating Mats |
| Brand | VIVOSUN |
| Color | Black |
| Customer Reviews | 4.6 out of 5 stars 27,417 Reviews |
| Is Dishwasher Safe | No |
| Material | Other |
| Pattern | Solid |
| Product Dimensions | 3"W x 20"H |

## Product Details

- **Brand:** VIVOSUN
- **Color:** Black
- **Material:** Other
- **Pattern:** Solid
- **Product Dimensions:** 3"W x 20"H

## Images

![VIVOSUN Durable Waterproof Seedling Heat Mat 3" x 20" UL & MET-Certified Heating Pad for Hydroponic, Kombucha Tea, Brewing, Fermentation & Plant Germination - Image 1](https://m.media-amazon.com/images/I/61TgC2X9muL.jpg)
![VIVOSUN Durable Waterproof Seedling Heat Mat 3" x 20" UL & MET-Certified Heating Pad for Hydroponic, Kombucha Tea, Brewing, Fermentation & Plant Germination - Image 2](https://m.media-amazon.com/images/I/81sCIrbsSBL.jpg)
![VIVOSUN Durable Waterproof Seedling Heat Mat 3" x 20" UL & MET-Certified Heating Pad for Hydroponic, Kombucha Tea, Brewing, Fermentation & Plant Germination - Image 3](https://m.media-amazon.com/images/I/71UN2P3a5DL.jpg)
![VIVOSUN Durable Waterproof Seedling Heat Mat 3" x 20" UL & MET-Certified Heating Pad for Hydroponic, Kombucha Tea, Brewing, Fermentation & Plant Germination - Image 4](https://m.media-amazon.com/images/I/81+TX9lTArL.jpg)
![VIVOSUN Durable Waterproof Seedling Heat Mat 3" x 20" UL & MET-Certified Heating Pad for Hydroponic, Kombucha Tea, Brewing, Fermentation & Plant Germination - Image 5](https://m.media-amazon.com/images/I/81NvwpYKfKL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: How do you secure this strip around the brewing jar?**
A: I use a rubber band to secure mine. Velcro strips or gaffer's tape would also work. If you're using this to brew kombucha or a comparable drink, whatever you do, don't set the jar on the heating pad, which is what another user recommended. That's the last thing you'd want to do. Doing this offsets yeast growth and will ruin batches. The variance in temperature throughout the container will also be greater.

**Q: I'm thinking of  this or the larger one for inside a little house I ordered for a feral cat, would it be adequate in frigid temps? It won't come insid**
A: Not a good choice as a heating mat for cats, because it will heat to 2 degrees above the cats body temperature.  I know this because my own old kitty, got on this mat when I was moving my dragonfruit babies from the mat to pot them up, said cat laid on it for the heat.  I let her do it for quite a while, even tho I knew it would get too hot for her.  She was on and off it, but it really would just get too hot.  So I finally broke down and bought a pet mat and wrapped a couple shirts around it.  That mat was a pet,  K&H 15.75x25.5 and sold on Amazon for 36$.  My old cat can lay on it all day without burning up.  This plant product wasn't intended for that much heat, it did ok, but works better for the purpose it was designed for.  Hope this helps, but I wouldn't do it myself, if only temporary until you could get a better "for pets" heated waterproof mat.

**Q: How long can it be plugged in for?**
A: Mine stays plugged in literally 24/7. I use it to start pepper seedings in January so I can't shut it off. I have had no issues with the surface underneath it overheating.

**Q: I have a 1 gallon glass jar for brewing kombucha in. Does the size of the mat make a difference? If so, which size is best - 3" x 20" or 10" x 20"?**
A: 10 by 20 is the best surface coverage. wrap it around the jug, not jug on top

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works well, heats to 100F
*by W***N on January 29, 2026*

Works well to quickly heat up to 100F.

### ⭐⭐⭐⭐⭐ Perfect for My Gallon Kombucha Jars
*by L***R on November 10, 2025*

I have 3 of these types of strip heating mats. I use them to go around my gallon sized kombucha jars during the winter and they work fine. They keep my fermenting kombucha at just the right temperature. Two of these mats I've had for years and only purchased another one fairly recently. I find them to be very useful and am very pleased with them.

### ⭐⭐⭐⭐⭐ Excellent quality
*by T***A on February 8, 2026*

I have been using these seed starting heat mats for several seasons now and they are very durable. The material is exceptional and heats very evenly between 65 and 70 degrees, perfect for germination. Highly recommend.

## Frequently Bought Together

- VIVOSUN Durable Waterproof Seedling Heat Mat 3" x 20" UL & MET-Certified Heating Pad for Hydroponic, Kombucha Tea, Brewing, Fermentation & Plant Germination
- VIVOSUN Digital Heat Mat Thermostat Controller, 40–108 ºF 1000W for Reptiles, Seedlings, Germination, Incubation and Fermentation
- VIVOSUN 2 Pack Durable Waterproof Seedling Heat Mat 10" x 20.75" UL & MET-Certified Warm Hydroponic Heating Pad for Germination, Indoor Gardening, Greenhouse

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*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-02-19*