--- product_id: 46711770 title: "3\" x 20\" Durable Waterproof Seedling Heat Mat | UL & MET-Certified Heating Pad for Hydroponic, Kombucha Tea, Brewing, Fermentation & Plant Germination" brand: "vivosun" price: "€ 39.57" currency: EUR in_stock: true category: "Vivosun" url: https://www.desertcart.hr/products/46711770-3-x-20-durable-waterproof-seedling-heat-mat-ul-met store_origin: HR region: Croatia --- # 6.5W ultra-low power consumption IP67 waterproof rating 68-86℉ optimal temp range 3" x 20" Durable Waterproof Seedling Heat Mat | UL & MET-Certified Heating Pad for Hydroponic, Kombucha Tea, Brewing, Fermentation & Plant Germination **Brand:** vivosun **Price:** € 39.57 **Availability:** βœ… In Stock ## Summary > πŸ”₯ Grow smarter, not harder β€” your secret weapon for unstoppable seedlings! ## Quick Answers - **What is this?** 3" x 20" Durable Waterproof Seedling Heat Mat | UL & MET-Certified Heating Pad for Hydroponic, Kombucha Tea, Brewing, Fermentation & Plant Germination by vivosun - **How much does it cost?** € 39.57 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/46711770-3-x-20-durable-waterproof-seedling-heat-mat-ul-met) ## 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 - β€’ **Versatile Indoor Use:** Perfect for seedlings, hydroponics, fermentation, kombucha brewing, and terrariums. - β€’ **Precision Heat Control:** Maintains ideal 68-86℉ for faster germination and propagation. - β€’ **Durable Waterproof Design:** IP67-rated PVC surface ensures longevity and easy cleaning without damage. - β€’ **Energy-Efficient Performance:** Runs on just 6.5 watts, saving electricity while delivering consistent warmth. - β€’ **Advanced Far-Infrared Technology:** Soft, uniform heat accelerates growth without scorching roots, enhancing plant vitality. ## Overview The VIVOSUN 3" x 20" Seedling Heat Mat is a professional-grade, waterproof heating pad designed to maintain optimal temperatures between 68-86℉. Featuring advanced far-infrared technology and double insulation, it ensures uniform warmth to speed up seed germination and plant growth. With an IP67 waterproof rating and ultra-low 6.5W power consumption, this durable mat is perfect for indoor gardening, fermentation, and more, backed by UL & MET certifications and a 1-year warranty. ## Description desertcart.com : VIVOSUN 3" x 20" Durable Waterproof Seedling Heat Mat | UL & MET-Certified Heating Pad for Hydroponic, Kombucha Tea, Brewing, Fermentation & Plant Germination : Patio, Lawn & Garden ## 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 β„ƒοΌˆ104℉）at an ambient temperature of 20-25 β„ƒοΌˆ68-77℉）in minutes; We recommend using it with the thermostat controller and humidity dome ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B073PTZCJ4 | | Best Sellers Rank | #1,580 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #1 in Plant Heating Mats | | Brand | VIVOSUN | | Brand Name | VIVOSUN | | Color | Black | | Customer Reviews | 4.6 out of 5 stars 27,946 Reviews | | Expected Blooming Period | Spring, Winter | | Expected Planting Period | Spring | | Indoor Outdoor Usage | Indoor | | Indoor/Outdoor Usage | Indoor | | Item Weight | 0.1 kg | | Manufacturer | VIVOSUN | | Manufacturer Part Number | VS-330104 | | Manufacturer Warranty Description | 1 Year | | Material Feature | Natural | | Material Features | Natural | | Moisture Needs | Moderate Watering | | Number of Items | 1 | | Number of Packs | 1 | | Number of Pieces | 1 | | Other Special Features of the Product | Waterproof | | Plant or Animal Product Type | Herb | | Product Care Instructions | water | | Special Feature | Waterproof | | UPC | 615435161501 | | Unit Count | 1 Count | ## Product Details - **Brand:** VIVOSUN - **Color:** Black - **Expected Blooming Period:** Spring, Winter - **Expected Planting Period:** Spring - **Indoor/Outdoor Usage:** Indoor - **Item Weight:** 0.1 Kilograms - **Material Feature:** Natural - **Product Care Instructions:** water - **Special Feature:** Waterproof - **Unit Count:** 1 Count ## Images ![3" x 20" Durable Waterproof Seedling Heat Mat | UL & MET-Certified Heating Pad for Hydroponic, Kombucha Tea, Brewing, Fermentation & Plant Germination - Image 1](https://m.media-amazon.com/images/I/51xnebEmX6L.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 ## 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 ΒΊF 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 --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/46711770-3-x-20-durable-waterproof-seedling-heat-mat-ul-met](https://www.desertcart.hr/products/46711770-3-x-20-durable-waterproof-seedling-heat-mat-ul-met) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-09-13*