--- product_id: 285390720 title: "Durable Waterproof Seedling Heat Mat Warm Hydroponic Heating Pad 3'' x 20\" for Kombucha Tea & Beer Brewing, Fermentation, Seedlings & Plant Germination" brand: "vivosun" price: "€ 45.19" currency: EUR in_stock: true category: "Vivosun" url: https://www.desertcart.be/products/285390720-durable-waterproof-seedling-heat-mat-warm-hydroponic-heating-pad-3 store_origin: BE region: Belgium --- # Perfect 3'' x 20'' size for seedlings & fermentation Waterproof design for durability Consistent warmth for optimal growth Durable Waterproof Seedling Heat Mat Warm Hydroponic Heating Pad 3'' x 20" for Kombucha Tea & Beer Brewing, Fermentation, Seedlings & Plant Germination **Brand:** vivosun **Price:** € 45.19 **Availability:** βœ… In Stock ## Summary > πŸ”₯ Elevate your growth game β€” warmth that works as hard as you do! ## Quick Answers - **What is this?** Durable Waterproof Seedling Heat Mat Warm Hydroponic Heating Pad 3'' x 20" for Kombucha Tea & Beer Brewing, Fermentation, Seedlings & Plant Germination by vivosun - **How much does it cost?** € 45.19 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.be](https://www.desertcart.be/products/285390720-durable-waterproof-seedling-heat-mat-warm-hydroponic-heating-pad-3) ## 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€’ **Trusted by Thousands:** 4.4-star rating from over 1,100 users proves reliability and performance you can count on. - β€’ **Jumpstart Your Green Thumb:** Compact 3'' x 20'' mat fits perfectly on window sills and small setups for early seed germination. - β€’ **Built to Last, Rain or Shine:** Durable waterproof construction means worry-free use in humid or damp environments. - β€’ **Energy Efficient Heat Delivery:** Maintains steady warmth without overheating, promoting healthy root development and fermentation consistency. - β€’ **All-Season Fermentation Partner:** Keeps kombucha and beer brewing jars at ideal temperatures, ensuring flawless fermentation even in winter. ## Overview The VIVOSUN Durable Waterproof Seedling Heat Mat is a compact, energy-efficient heating pad designed to provide consistent warmth for seedlings, hydroponic plants, and fermentation projects like kombucha and beer brewing. Measuring 3'' x 20'', it fits perfectly on window sills and small setups. Its waterproof, durable design ensures long-lasting performance in moist environments, backed by a strong 4.4-star user rating. ## Description Other (Hydroponics) ## Features - manufacturer: Old Tjikko - Item Trademark: OLD TJIKKO - Item Weight: kilograms, pounds, 0.2204622620, 0.10 - Item Category: Plant Seed ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B073PTZCJ4 | | Brand Name | VIVOSUN | | Color | Green | | Customer Reviews | 4.4 4.4 out of 5 stars (1,177) | | Item Weight | 0.1 Kilograms | | Manufacturer | Old Tjikko | | Manufacturer Part Number | VS-330104 | | Moisture Needs | Moderate Watering | | Number of Pieces | 1 | | Plant or Animal Product Type | Herb | | UPC | 615435161501 | | Unit Count | 1 Count | ## Product Details - **Brand:** VIVOSUN - **Colour:** Green - **Item weight:** 0.1 Kilograms - **Moisture needs:** Moderate Watering - **Unit count:** 1 Count ## Images ![Durable Waterproof Seedling Heat Mat Warm Hydroponic Heating Pad 3'' x 20" for Kombucha Tea & Beer Brewing, Fermentation, Seedlings & Plant Germination - Image 1](https://m.media-amazon.com/images/I/51xnebEmX6L.jpg) ## 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.be/products/285390720-durable-waterproof-seedling-heat-mat-warm-hydroponic-heating-pad-3](https://www.desertcart.be/products/285390720-durable-waterproof-seedling-heat-mat-warm-hydroponic-heating-pad-3) --- *Product available on Desertcart Belgium* *Store origin: BE* *Last updated: 2026-10-16*