--- product_id: 50471586 title: "TSI Supercool 39241B-YF HFO-1234yf Total Leak Stop Plus U/V Dye. (NOT for USE in R134a Systems)" brand: "tsi supercool" price: "$63.49" currency: USD in_stock: true reviews_count: 13 category: "Tsi Supercool" url: https://www.desertcart.us/products/50471586-tsi-supercool-39241b-yf-hfo-1234yf-total-leak-stop-plus store_origin: US region: United States of America --- # Includes UV dye for leak detection Stops leaks in metal & rubber A/C parts Patented HFC-Free BOV delivery system TSI Supercool 39241B-YF HFO-1234yf Total Leak Stop Plus U/V Dye. (NOT for USE in R134a Systems) **Brand:** tsi supercool **Price:** $63.49 **Availability:** ✅ In Stock ## Summary > ❄️ Seal the cool, skip the sweat — your A/C’s secret weapon! ## Quick Answers - **What is this?** TSI Supercool 39241B-YF HFO-1234yf Total Leak Stop Plus U/V Dye. (NOT for USE in R134a Systems) by tsi supercool - **How much does it cost?** $63.49 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/50471586-tsi-supercool-39241b-yf-hfo-1234yf-total-leak-stop-plus) ## Best For - tsi supercool enthusiasts ## Why This Product - Trusted tsi supercool brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **One Can, One Vehicle:** Each overfilled can treats a full vehicle, guaranteeing optimal fluid injection and residual protection. - • **UV Dye Leak Detection:** Integrated UV dye makes pinpointing leaks effortless, saving time and costly repairs. - • **Precision Leak Sealing:** Effectively seals small leaks in evaporators, condensers, hoses, gaskets & O-rings for lasting A/C performance. - • **Hybrid & Electric Ready:** Formulated to be fully compatible with hybrid and electric vehicle compressors for future-proof maintenance. - • **HFC-Free Safe Application:** Patented BOV delivery system ensures quick, safe, and eco-friendly application without harming system components. ## Overview TSI Supercool 39241B-YF is a specialized total leak stop and UV dye solution designed exclusively for HFO-1234yf refrigerant A/C systems. It effectively seals small leaks in metal and rubber components while lubricating the system to extend compressor life. Featuring a patented HFC-free BOV delivery system and a quick-connect hose adapter, it ensures safe, precise application without damaging hybrid or electric vehicle compressors. One can treats one vehicle, making it a must-have for maintaining peak A/C performance and avoiding costly recharges. ## Description Total Leak Stop for HFO-1234yf AC Refrigerant systems. Stops small leaks in METAL & RUBBER A/C components including evaporators, condenser, hoses, gaskets & O-rings. (NOT FOR USE IN R134a SYSTEMS) Features Patented “HFC Free” BOV Delivery System for quick safe application. Lubricates A/C system to improve performance and help extend system life. Supercool Total Leak Stop does not contain harmful polymers and will not harm A/C system components, reclamation, or recovery equipment. Includes HFO-1234yf Application Hose with Quick Connect Coupler. Safe for hybrid & electric compressors. One can treats 1 vehicle. Review: Funciona - Funciona 100% Review: Great - Great ## Features - Total Leak Stop for HFO-1234yf AC Refrigerant systems. Stops small leaks in METAL & RUBBER A/C components including evaporators, condenser, hoses, gaskets & O-rings. (NOT FOR USE IN R134a SYSTEMS) - IMPORTANT: Confirm your vehicle uses HFO-1234yf Refrigerant. HFO-1234yf low side service port adapter is larger in diameter than an R134a low side service port. The quick connect hose coupler should fit snugly. If it does not fit snugly it indicates the system is not an HFO-1234yf Refrigerant System - Each can is overfilled to ensure proper amount of fluid is injected into AC System and allows for residual fluid remaining in hose after application - Scan QR code on product box for short video on proper installation - 1 can treats 1 vehicle ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01981J9DU | | Best Sellers Rank | #17,600 in Automotive ( See Top 100 in Automotive ) #126 in Air Conditioning Tools & Equipment | | Brand | TSI Supercool | | Brand Name | TSI Supercool | | Compatible Material | Metal, Rubber | | Customer Reviews | 4.0 out of 5 stars 317 Reviews | | Global Trade Identification Number | 00672264043262 | | Included Components | TSI Supercool 39241B-YF Total Leak Stop and U/V Dye, 1 oz (HFC Free BOV Can with 1234yf Adapter, Retail Box) | | Item Form | Spray | | Item Type Name | TSI Supercool 39241B-YF Total Leak Stop and U/V Dye, 1 oz (HFC Free BOV Can with 1234yf Adapter, Retail Box) | | Item Weight | 1 Ounces | | Manufacturer | TSI Supercool | | Manufacturer Part Number | 39241B-YF | | Model Number | 39241B-YF | | Number of Items | 1 | | UPC | 672264043262 | | Unit Count | 1.0 Count | | Warranty Description | manufacturer warranty | ## Product Details - **Brand:** TSI Supercool - **Compatible Material:** Metal, Rubber - **Item Form:** Spray - **Item Weight:** 1 Ounces - **Unit Count:** 1.0 Count ## Images ![TSI Supercool 39241B-YF HFO-1234yf Total Leak Stop Plus U/V Dye. (NOT for USE in R134a Systems) - Image 1](https://m.media-amazon.com/images/I/71hJykbeHhL.jpg) ![TSI Supercool 39241B-YF HFO-1234yf Total Leak Stop Plus U/V Dye. (NOT for USE in R134a Systems) - Image 2](https://m.media-amazon.com/images/I/811AZUZRRjL.jpg) ![TSI Supercool 39241B-YF HFO-1234yf Total Leak Stop Plus U/V Dye. (NOT for USE in R134a Systems) - Image 3](https://m.media-amazon.com/images/I/71kPoHe-EmL.jpg) ![TSI Supercool 39241B-YF HFO-1234yf Total Leak Stop Plus U/V Dye. (NOT for USE in R134a Systems) - Image 4](https://m.media-amazon.com/images/I/71-F1dIgXhL.jpg) ## Available Options This product comes in different **Style** options. ## Questions & Answers **Q: Can you use in home refrigator** A: It only works for HFO1234YF refrigerant **Q: Does this have refrigerant in it?** A: No it does not have refrigerant. **Q: Anybody had success with this?** A: yes, had a leak in the system with a dealer estimate of over 1k to fix. First use of this and leak was fixed **Q: Any tricks to get it to pump inside the system? . It doesn't have enough pressure** A: I'm not aware of any tricks. I think you just have to apply it when the pressure in your system is already pretty low. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Funciona *by M***Z on April 25, 2026* Funciona 100% ### ⭐⭐⭐⭐⭐ Great *by J***M on April 12, 2026* Great ### ⭐ Fluid leaked out *by M***R on April 14, 2026* Waste of my money. Arrived w a hole in the bottle and all fluid leaked out. Couldn't use it ## Frequently Bought Together - TSI Supercool 39241B-YF Total Leak Stop and U/V Dye, 1 oz (HFC Free BOV Can with 1234yf Adapter, Retail Box) - ZeroR® Genuine R1234YF in 8oz SSV Cans | 3 Cans with Zeror Service Label --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/50471586-tsi-supercool-39241b-yf-hfo-1234yf-total-leak-stop-plus](https://www.desertcart.us/products/50471586-tsi-supercool-39241b-yf-hfo-1234yf-total-leak-stop-plus) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-05-19*