--- product_id: 181297672 title: "RT175B Big Blu Brush On MicroLeak Detector Blue" brand: "refrigeration technologies" price: "£23.07" currency: GBP in_stock: true reviews_count: 8 category: "Refrigeration Technologies" url: https://www.desertcart.co.uk/products/181297672-rt175b-big-blu-brush-on-microleak-detector-blue store_origin: GB region: United Kingdom --- # Detects leaks as small as 0.74 oz/year Brush-on applicator with 10-inch extension dauber NSF certified & non-corrosive formula RT175B Big Blu Brush On MicroLeak Detector Blue **Brand:** refrigeration technologies **Price:** £23.07 **Availability:** ✅ In Stock ## Summary > 🔍 Spot the tiniest leaks before they become costly disasters! ## Quick Answers - **What is this?** RT175B Big Blu Brush On MicroLeak Detector Blue by refrigeration technologies - **How much does it cost?** £23.07 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/181297672-rt175b-big-blu-brush-on-microleak-detector-blue) ## Best For - refrigeration technologies enthusiasts ## Why This Product - Trusted refrigeration technologies brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Brush-On Convenience:** Easy, targeted application with a 10-inch extension dauber—no mess, no fuss - • **Micro Leak Precision:** Pinpoint leaks down to 0.74 oz/year for ultimate system safety - • **Versatile Leak Detection:** Perfect for HVAC, plumbing, gas utilities, and more—detect leaks anywhere, anytime - • **Food-Safe & Non-Corrosive:** NSF certified formula safe for use around food and all gas types - • **Trusted by Pros Worldwide:** Industry-leading solution favored by OEMs and HVAC, telecom, aerospace experts ## Overview The RT175B Big Blu Brush On MicroLeak Detector is a professional-grade, NSF certified, non-corrosive liquid designed to detect micro gas leaks as small as 0.74 oz/year. Featuring a convenient brush-on applicator with a 10-inch extension dauber, it delivers precise, persistent leak detection trusted by industry experts across HVAC, plumbing, aerospace, and telecom sectors. ## Description This is our original Big Blu microleak detector downsized into a Brush On applicator. This product is great for spot leak applications and is supplied with a 10 inch extension dauber. Big Blu is a well-established bubble leak detector solution capable of detecting micro gas leakage down to 0.65 oz/yr. It is a strong persistent film forming liquid that has excelled in the field identification of gas leaks. Big Blu is used by OEM’s and industry professionals worldwide. Suitable for use with all gases to detect leaks on any pressurized system. Commonly used in HVAC, plumbing, telecom, aerospace, gas utilities, service industries and MVAC. Review: Simple but effective product - This is not your typical soapy water. This is some thick stuff. Normally I use soapy water or some type of cleaner and wanted something more sensitive. While this takes a little time for stuff to show, this is quite good at showing the micro leaks. I’m very pleased at this for the price as this helps finding a tiny leak when a leak detector can’t find it when it’s a little breezy. Review: Good product. - Great product that everyone should have around for checking for possible leaks ## Features - NSF certified for use around food - Non-Corrosive - Detects Micro Leaks down to 0.74 oz/year - Safe of any type of gas - Brush on Bottle ## Technical Specifications | Specification | Value | |---------------|-------| | Customer Reviews | 4.7 out of 5 stars 394 Reviews | ## Product Details - **Brand:** Refrigeration Technologies - **Style:** simple - **Power Source:** Gas Powered - **Color:** Blue - **Item Weight:** 0.01 Ounces - **Alarm:** Audible - **Sensor Type:** Photoelectric - **Number of Items:** 1 - **Manufacturer:** Refrigeration Technologies - **UPC:** 017857175089 ## Images ![RT175B Big Blu Brush On MicroLeak Detector Blue - Image 1](https://m.media-amazon.com/images/I/61MMXE0a5WL.jpg) ## Questions & Answers **Q: Can you please clarify the product description? is this product "brush on blu micro leak detector - dauber part #rt175b"** A: Yes it is. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Simple but effective product *by O***B on January 4, 2026* This is not your typical soapy water. This is some thick stuff. Normally I use soapy water or some type of cleaner and wanted something more sensitive. While this takes a little time for stuff to show, this is quite good at showing the micro leaks. I’m very pleased at this for the price as this helps finding a tiny leak when a leak detector can’t find it when it’s a little breezy. ### ⭐⭐⭐⭐⭐ Good product. *by Z***1 on March 11, 2026* Great product that everyone should have around for checking for possible leaks ### ⭐⭐⭐⭐⭐ Easy to use and accurate *by M***J on May 11, 2025* Best leak detection that I have used. You will know one way or the other if you have a leak. Simple and trustworthy. ## Frequently Bought Together - Refrigeration Technologies RT175B Big Blu Brush On MicroLeak Detector Blue - Refrigeration Technologies RT201B Nylog Gasket/Thread Sealant, 30 ml (1 Pack) - Appion MGAVCT 1/4" MegaFlow Vacuum-Rated Valve Core Removal Tool --- ## 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.co.uk/products/181297672-rt175b-big-blu-brush-on-microleak-detector-blue](https://www.desertcart.co.uk/products/181297672-rt175b-big-blu-brush-on-microleak-detector-blue) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-08-07*