{"title":"Leak Detection","description":"\u003cp\u003eUV dyes, leak sealers, and detection chemistry. Stop the leak before it costs a compressor.\u003c\/p\u003e","products":[{"product_id":"uv-dye-universal-pag-oil-for-r134a-ac-systems","title":"UV Dye Universal PAG Oil for R134a AC Systems – 8oz","description":"\u003cp\u003e\u003cstrong\u003eUniversal PAG oil with built-in UV dye for R-134a A\/C leak detection\u003c\/strong\u003e — formulated to blend with PAG 46, PAG 100, and PAG 150 systems. When you don't know what's in the compressor and you're chasing an intermittent leak, this is the bottle that goes in. Top off, run the system, and the dye shows you the leak under any UV light. Skip the separate dye injector, skip the dosing math.\u003c\/p\u003e\u003cp\u003eHCPRO Performance Universal UV PAG is an \u003cstrong\u003e8 oz \/ 237 mL automotive A\/C compressor lubricant + fluorescent leak detection additive\u003c\/strong\u003e. Universal viscosity blend (~46–100 cSt) mixes with any existing PAG grade. Built-in dye meets \u003cstrong\u003eSAE J2297\u003c\/strong\u003e UV detection standard. For \u003cstrong\u003eR-134a systems in domestic and imported autos, light-duty trucks, and standard service equipment\u003c\/strong\u003e. NOT for R-1234yf, hybrid, or EV compressors.\u003c\/p\u003e\u003ch3\u003eWho this oil is for\u003c\/h3\u003e\u003cp\u003eAuto A\/C techs chasing intermittent R-134a leaks. Mobile mechanics doing recharges where systems lose charge between visits. Fleet techs servicing mixed inventories where OEM PAG spec isn't always known. Independent shops that want one universal bottle instead of three viscosities.\u003c\/p\u003e\u003ch3\u003eWhen to use it\u003c\/h3\u003e\u003cp\u003eAdd during recharge to diagnose slow leaks you can't visually locate. Inject 1–2 oz per circuit for diagnostic; refer to OEM spec for full compressor replacement (4–8 oz typical). Run A\/C 10–15 minutes, inspect with UV light (365–400 nm) — leaks glow fluorescent green-yellow at fittings and seals. 8 oz covers 4–8 diagnostic jobs.\u003c\/p\u003e\u003ch3\u003eWhy universal UV PAG vs grade-specific PAG\u003c\/h3\u003e\u003cp\u003eOne bottle covers any PAG 46\/100\/150 system — no need to stock three viscosities. Built-in dye eliminates separate injection. For a known OEM viscosity spec, use grade-specific PAG (46\/100\/150 UV); for unknown systems or universal top-off, this is the answer.\u003c\/p\u003e\u003cp\u003eSingle 8 oz bottle, moisture-sealed packaging. \u003cem\u003eManufactured in the USA to OEM compressor lubricant performance standards.\u003c\/em\u003e\u003c\/p\u003e","brand":"HCPRO","offers":[{"title":"Each 8 oz Bottle","offer_id":50868571078957,"sku":"02-0036","price":15.5,"currency_code":"USD","in_stock":true},{"title":"8 oz Bottle (6 Pack)","offer_id":50868571111725,"sku":"02-0036-6A","price":65.0,"currency_code":"USD","in_stock":true},{"title":"8 oz Bottle (12 Pack)","offer_id":50868571144493,"sku":"02-0036-12A","price":95.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0927\/3799\/5053\/files\/63ca3c28-Product_Image_2000x2000_0079_PROD_IMG_B2C_PU_UV-LUB_8_FRONT.jpg?v=1749680885"},{"product_id":"hclsk2-hvac-r-high-performance-and-refrigerant-leak-sealant-with-45-swivel-adapter","title":"HCLSK2 2oz HVAC Leak Sealant with 45° Swivel Adapter","description":"\u003cp\u003e\u003cstrong\u003eHVAC-R refrigerant leak sealant with 45° swivel low-side adapter\u003c\/strong\u003e — pre-charged 2 oz syringe that seals pinhole leaks, porous metal leaks, and micro-leaks in HVAC, refrigeration, and automotive A\/C systems. Universal compatibility with HFC, HFO, A2L, and hydrocarbon refrigerants AND all major oil types (POE, PAG, mineral, alkylbenzene).\u003c\/p\u003e\u003cp\u003eHCPRO Performance HCLSK2 is a \u003cstrong\u003epre-charged 2 oz refrigerant-soluble sealant with anti-corrosion additive package\u003c\/strong\u003e. Compatible refrigerants: \u003cstrong\u003eR-134a, R-410A, R-22, R-1234yf, R-404A, R-407C, R-290 propane, R-600 butane\u003c\/strong\u003e. NOT for ammonia systems. Compatible oils: POE, mineral, PAG, alkylbenzene. Rated for operation up to \u003cstrong\u003e800 PSI\u003c\/strong\u003e. Treats systems \u003cstrong\u003eup to 6 tons of refrigeration per syringe\u003c\/strong\u003e. Includes 45° swivel adapter for tight low-side service ports.\u003c\/p\u003e\u003ch3\u003eWho this sealant is for\u003c\/h3\u003e\u003cp\u003eHVAC technicians chasing slow refrigerant loss on residential split systems and mini-splits. Mobile auto A\/C techs sealing leaks without recovering refrigerant. Refrigeration contractors restoring system pressure on walk-in coolers and reach-ins. Fleet maintenance crews keeping commercial A\/C units running. Anyone whose customer's system is losing 1–2 oz per week and they don't want a $1,500 compressor replacement.\u003c\/p\u003e\u003ch3\u003eWhen to use it\u003c\/h3\u003e\u003cp\u003eFor \u003cstrong\u003emicro-leaks, pinhole leaks, and porous metal leaks\u003c\/strong\u003e that drop pressure over weeks or months but aren't visually locatable. Screw the 45° adapter onto the syringe, connect to the low-side service port, inject with the system running. \u003cstrong\u003eNo refrigerant recovery required\u003c\/strong\u003e. One 2 oz syringe treats up to a 6-ton system. NOT for mechanical leaks at loose fittings, fractured copper, or split hoses — replace those components.\u003c\/p\u003e\u003ch3\u003eWhy HCLSK2 vs cheap stop-leak products\u003c\/h3\u003e\u003cp\u003eCheap stop-leak uses polymer chemistry that hardens throughout the system and \u003cstrong\u003eclogs TXVs, orifices, and evaporator coils\u003c\/strong\u003e. HCLSK2's refrigerant-soluble formula only reacts at leak points where it contacts atmosphere — the rest of the system stays clean. Anti-corrosion additive prevents the underlying corrosion that caused the leak from spreading. Rated to 800 PSI for R-410A high-pressure systems. Universal oil and refrigerant compatibility.\u003c\/p\u003e\u003cp\u003eAvailable in \u003cstrong\u003esingle 2 oz syringe\u003c\/strong\u003e, \u003cstrong\u003e2-pack, 4-pack, and 12-pack\u003c\/strong\u003e at trade pricing. \u003cem\u003eManufactured in the USA to industry HVAC-R sealant performance standards.\u003c\/em\u003e\u003c\/p\u003e","brand":"HCPRO","offers":[{"title":"Each 2 oz Syringe","offer_id":50868884308269,"sku":"02-0076","price":48.3,"currency_code":"USD","in_stock":false},{"title":"2 oz Syringe (2 Pack)","offer_id":50868884341037,"sku":"02-0076-2","price":88.38,"currency_code":"USD","in_stock":true},{"title":"2 oz Syringe (4 Pack)","offer_id":50868884373805,"sku":"02-0076-4","price":168.91,"currency_code":"USD","in_stock":true},{"title":"2 oz Syringe (12 Pack)","offer_id":50868884406573,"sku":"02-0076-12","price":465.34,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0927\/3799\/5053\/files\/d53ace0a-Product_Image_2000x2000_0063_PROD_IMG_B2C_2OZ_LEAK-SEALER_HVAC-R_2.jpg?v=1765381917"},{"product_id":"uv-dye-pag-46-oil-for-r134a-ac-systems","title":"PAG 46 Oil w\/ UV Dye – 8 oz for R134a A\/C Systems | Leak Detection","description":"\u003cp\u003e\u003cstrong\u003ePAG 46 oil with UV dye for R-134a A\/C systems\u003c\/strong\u003e — when the OEM service manual calls for ISO VG 46 viscosity AND you need leak detection in the same step. Lower-viscosity PAG matched to lighter-duty R-134a compressors found in imported and compact vehicles, with fluorescent dye already in the bottle.\u003c\/p\u003e\u003cp\u003eHCPRO Performance PAG 46 UV is an \u003cstrong\u003e8 oz \/ 237 mL light-viscosity PAG compressor lubricant + UV leak detection dye\u003c\/strong\u003e. ISO VG 46 \/ SUS 150, polyalkylene glycol base, dye meets \u003cstrong\u003eSAE J2297\u003c\/strong\u003e leak-detection standards. For \u003cstrong\u003eR-134a A\/C systems specifying PAG 46\u003c\/strong\u003e — many Asian imports, compact passenger vehicles, certain truck applications. NOT for R-1234yf, hybrid, or EV compressors.\u003c\/p\u003e\u003ch3\u003eWho this oil is for\u003c\/h3\u003e\u003cp\u003eAuto A\/C techs servicing imports and compact vehicles where OEM specifies PAG 46. Mobile mechanics doing recharges on light-duty applications. Fleet shops servicing import inventories.\u003c\/p\u003e\u003ch3\u003eWhen to use it\u003c\/h3\u003e\u003cp\u003eDuring R-134a recharge when the system needs PAG 46 viscosity AND fluorescent leak detection in one step. Diagnostic top-off: 1–2 oz per circuit. Full compressor replacement: 4–8 oz per OEM spec. Inspect with any UV-A light (365–400 nm) — leaks glow fluorescent green-yellow.\u003c\/p\u003e\u003ch3\u003eWhy grade-specific PAG 46 UV vs Universal UV\u003c\/h3\u003e\u003cp\u003eSpecific viscosity match means tighter compressor clearance, longer life, exact OEM warranty compliance. Use Universal UV when you don't know the system viscosity; use PAG 46 UV when the OEM service manual explicitly specifies VG 46. Same UV chemistry, more precise spec match.\u003c\/p\u003e\u003cp\u003eSingle 8 oz bottle, moisture-sealed. \u003cem\u003eManufactured in the USA to OEM compressor lubricant performance standards.\u003c\/em\u003e\u003c\/p\u003e","brand":"HCPRO","offers":[{"title":"Each 8 oz Bottle","offer_id":50830681473325,"sku":"02-0033A","price":11.97,"currency_code":"USD","in_stock":true},{"title":"8 oz Bottle (6 Pack)","offer_id":50820547674413,"sku":"02-0033A-6","price":54.0,"currency_code":"USD","in_stock":true},{"title":"8 oz Bottle (12 Pack)","offer_id":50820547707181,"sku":"02-0033A-12","price":92.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0927\/3799\/5053\/files\/ee5b6fd1-Product_Image_2000x2000_0075_PROD_IMG_B2C_P46UV-LUB_8_FRONT.jpg?v=1761590396"},{"product_id":"uv-dye-pag-150-oil-for-r134a-ac-systems","title":"PAG 150 Oil w\/ UV Dye – 8 oz for R134a A\/C Systems | Leak Detection","description":"\u003cp\u003e\u003cstrong\u003ePAG 150 oil with UV dye for R-134a heavy-duty A\/C systems\u003c\/strong\u003e — high-viscosity PAG for trucks, heavy-duty vehicles, and high-pressure R-134a applications where standard 46 or 100 viscosity won't hold film strength. Fluorescent dye built in for one-step leak detection.\u003c\/p\u003e\u003cp\u003eHCPRO Performance PAG 150 UV is an \u003cstrong\u003e8 oz \/ 237 mL heavy-viscosity PAG compressor lubricant + UV leak detection dye\u003c\/strong\u003e. ISO VG 150 \/ SUS 300, polyalkylene glycol base, dye meets \u003cstrong\u003eSAE J2297\u003c\/strong\u003e. For \u003cstrong\u003eR-134a A\/C systems specifying PAG 150\u003c\/strong\u003e — heavy-duty trucks, fleet vehicles, certain commercial applications, and light HVAC equipment that uses R-134a. NOT for R-1234yf, hybrid, or EV compressors.\u003c\/p\u003e\u003ch3\u003eWho this oil is for\u003c\/h3\u003e\u003cp\u003eHeavy-duty truck A\/C technicians. Fleet maintenance teams servicing commercial vehicles. Auto A\/C techs working on full-size SUVs and pickups where OEMs spec the heavier viscosity. Service techs on certain commercial refrigeration units running R-134a with PAG 150.\u003c\/p\u003e\u003ch3\u003eWhen to use it\u003c\/h3\u003e\u003cp\u003eDuring R-134a recharge when the OEM calls for PAG 150 AND fluorescent leak detection is needed. Diagnostic top-off: 1–2 oz per circuit. Full compressor replacement: 4–8 oz per OEM spec (heavy-duty systems often run higher capacities — check the manual). Inspect with UV-A light (365–400 nm).\u003c\/p\u003e\u003ch3\u003eWhy PAG 150 UV vs PAG 100 UV or Universal UV\u003c\/h3\u003e\u003cp\u003eHeavy-duty compressors need heavier viscosity to maintain oil film under high pressure and high-load conditions. Running PAG 100 in a PAG 150 system causes premature compressor wear under load; running PAG 150 in a lighter system causes drag. When the OEM calls for 150, use 150.\u003c\/p\u003e\u003cp\u003eSingle 8 oz bottle, moisture-sealed. \u003cem\u003eManufactured in the USA to OEM compressor lubricant performance standards.\u003c\/em\u003e\u003c\/p\u003e","brand":"HCPRO","offers":[{"title":"8 oz Bottle (1 Pack)","offer_id":50856577106221,"sku":"02-0035","price":12.65,"currency_code":"USD","in_stock":true},{"title":"8 oz Bottle (6 Pack)","offer_id":50856577138989,"sku":"02-0035-6","price":54.16,"currency_code":"USD","in_stock":true},{"title":"8 oz Bottle (12 Pack)","offer_id":50856577171757,"sku":"02-0035-12","price":98.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0927\/3799\/5053\/files\/c2441e45-Product_Image_2000x2000_0066_PROD_IMG_B2C_P150UV-LUB_8_FRONT.jpg?v=1761590391"},{"product_id":"uv-dye-pag-100-oil-for-r134a-ac-systems","title":"PAG 100 Oil w\/ UV Dye – 8 oz for R134a AC Systems | Leak Detection","description":"\u003cp\u003e\u003cstrong\u003ePAG 100 oil with UV dye for R-134a A\/C systems\u003c\/strong\u003e — the standard viscosity grade for most domestic R-134a automotive compressors, with fluorescent dye built in for leak detection. The most common PAG-with-UV bottle you'll need on a service truck servicing American vehicles.\u003c\/p\u003e\u003cp\u003eHCPRO Performance PAG 100 UV is an \u003cstrong\u003e8 oz \/ 237 mL standard-viscosity PAG compressor lubricant + UV leak detection dye\u003c\/strong\u003e. ISO VG 100 \/ ~98 SUS, polyalkylene glycol base, dye meets \u003cstrong\u003eSAE J2297\u003c\/strong\u003e leak-detection standards. For \u003cstrong\u003eR-134a A\/C systems specifying PAG 100\u003c\/strong\u003e — most domestic vehicles (GM, Ford, Chrysler) and many imports. NOT for R-1234yf, hybrid, or EV compressors.\u003c\/p\u003e\u003ch3\u003eWho this oil is for\u003c\/h3\u003e\u003cp\u003eAuto A\/C techs servicing domestic vehicles where OEM specifies PAG 100 (most common viscosity grade). Mobile mechanics, fleet service, independent repair shops. The go-to bottle for the majority of R-134a service work.\u003c\/p\u003e\u003ch3\u003eWhen to use it\u003c\/h3\u003e\u003cp\u003eDuring R-134a recharge when the OEM calls for PAG 100 AND you want leak detection in one step. Diagnostic top-off: 1–2 oz per circuit. Full compressor replacement: 4–8 oz per OEM spec. Inspect with UV-A light (365–400 nm) — leaks glow fluorescent green-yellow at the leak point.\u003c\/p\u003e\u003ch3\u003eWhy PAG 100 UV vs Universal UV or PAG 46\/150 UV\u003c\/h3\u003e\u003cp\u003ePAG 100 is the most-specified viscosity grade across domestic R-134a vehicles — running PAG 46 in a PAG 100 system reduces film strength under load; running PAG 150 increases drag and reduces cooling efficiency. When the OEM calls for 100, use 100. Universal UV blend is the safe choice when system viscosity is unknown.\u003c\/p\u003e\u003cp\u003eSingle 8 oz bottle, moisture-sealed. \u003cem\u003eManufactured in the USA to OEM compressor lubricant performance standards.\u003c\/em\u003e\u003c\/p\u003e","brand":"HCPRO","offers":[{"title":"8 oz Bottle (1 Pack)","offer_id":50856572027181,"sku":"02-0034","price":13.96,"currency_code":"USD","in_stock":false},{"title":"8 oz Bottle (6 Pack)","offer_id":50856572059949,"sku":"02-0034-6","price":56.85,"currency_code":"USD","in_stock":false},{"title":"8 oz Bottle (12 Pack)","offer_id":50856572092717,"sku":"02-0034-12","price":96.85,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0927\/3799\/5053\/files\/4aad9484-Product_Image_2000x2000_0071_PROD_IMG_B2C_P100UV-LUB_8_FRONT.jpg?v=1761590387"},{"product_id":"hcleak12r-pro-leak-sealer-with-45-swivel-adapter-for-easy-access-application-12-applications-0-25-fl-oz-for-ac-refrigeration-and-automotive-systems-compatible-with-all-refrigerants","title":"HCLEAK12R Pro Leak Sealer with 45° Swivel Adapter","description":"\u003cp\u003eTwelve pre-charged 0.25 oz syringes of \u003cstrong\u003eHCPRO Performance HCLEAK12R Automotive A\/C Leak Sealer\u003c\/strong\u003e — built for shop teams running fleet PM, mobile A\/C service routes, and high-volume R-134a and R-1234yf repair. Each syringe seals one micro-leak or pre-treats one vehicle. One kit covers a full week of service calls or a fleet of twelve vehicles.\u003c\/p\u003e\u003ch3\u003eWhat's in the kit\u003c\/h3\u003e\u003cp\u003e12 individually sealed 0.25 oz refrigerant-soluble sealant syringes plus one re-usable 45° swivel low-side adapter. Pre-charged formula injects directly into the running A\/C system through the low-side service port — \u003cstrong\u003eno refrigerant recovery, no system disassembly, no separate tools required\u003c\/strong\u003e. The 45° swivel adapter is engineered for tight engine compartments where straight fittings won't reach. Compatible with R-134a, R-1234yf, and all current hybrid and EV refrigerants. Safe for PAG, POE, ester, and mineral oils.\u003c\/p\u003e\u003ch3\u003eWho it's built for\u003c\/h3\u003e\u003cp\u003eMobile A\/C service techs, dealership service writers, fleet maintenance managers, mechanic shops running R-134a and R-1234yf systems side-by-side, and DIY techs servicing personal hybrids and EVs. Equally suited to repair calls AND preventive maintenance — see below.\u003c\/p\u003e\u003ch3\u003eWhen to use it — repair AND preventive maintenance\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eActive repair:\u003c\/strong\u003e Inject one syringe when a customer reports warm air at the vent and the gauge shows slow pressure loss consistent with a micro-leak. Restores cooling without a $1,500 compressor replacement.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003ePreventive maintenance — the main reason this ships in 12-packs:\u003c\/strong\u003e Inject one syringe during annual fleet PM, seasonal A\/C service, or new-vehicle commissioning to seal pinhole leaks \u003cstrong\u003ebefore\u003c\/strong\u003e they drop pressure. Standard practice on dealership PDI inspections, rental fleets, ride-share vehicles, and any hybrid or EV where compressor replacement runs $2,000+. A proactive seal at $5 per dose prevents a catastrophic failure 18 months later.\u003c\/p\u003e\u003ch3\u003eWhy it works\u003c\/h3\u003e\u003cp\u003ePre-charged refrigerant-soluble chemistry circulates with the refrigerant and reacts ONLY at leak points where it contacts atmosphere — it does NOT clog TXVs, orifices, or evaporator coils like cheap stop-leak products. Anti-corrosion additive package prevents the underlying corrosion that caused the leak from spreading. Rated to 800 PSI for high-pressure modern systems. 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Each syringe seals one micro-leak or pre-treats one system. One kit covers a full year of PM for a 12-unit account or a half-year of week-on-week service calls.\u003c\/p\u003e\u003ch3\u003eWhat's in the kit\u003c\/h3\u003e\u003cp\u003e12 individually sealed 0.25 oz refrigerant-soluble sealant syringes plus one re-usable 45° swivel low-side adapter. Pre-charged formula injects directly into the running system through the low-side service port — \u003cstrong\u003eno pump-down, no recovery, no system disassembly\u003c\/strong\u003e. The 45° swivel adapter accesses tight low-side ports on condensers, mini-split outdoor units, and packaged rooftops. Universal compatibility with R-410A, R-22, R-32, R-134a, R-1234yf, R-404A, R-407C, R-290, and R-600. Compatible with POE, mineral, PAG, and alkylbenzene oils.\u003c\/p\u003e\u003ch3\u003eWho it's built for\u003c\/h3\u003e\u003cp\u003eHVAC service contractors, refrigeration techs, mini-split installers, property maintenance managers, and shops running annual PM contracts on residential or light-commercial systems. Especially useful for technicians keeping aging R-22 equipment alive while customers budget for retrofit.\u003c\/p\u003e\u003ch3\u003eWhen to use it — repair AND preventive maintenance\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eActive repair:\u003c\/strong\u003e Inject one syringe when a system has lost pressure over weeks or months but the leak isn't visible at the coil or fitting. Refrigerant-soluble formula migrates to the leak point and seals from inside the system.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003ePreventive maintenance — the main reason this ships in 12-packs:\u003c\/strong\u003e Inject one syringe during annual or seasonal service to seal pinhole leaks \u003cstrong\u003ebefore\u003c\/strong\u003e they cause callbacks. Standard practice on PM contracts for restaurants, walk-in cold rooms, mini-split installations, rental property HVAC, and aging R-22 equipment that's hard to retrofit. A proactive seal at $8 per dose prevents a $1,500 to $3,000 compressor or coil failure 18 months later.\u003c\/p\u003e\u003ch3\u003eWhy it works\u003c\/h3\u003e\u003cp\u003ePre-charged refrigerant-soluble chemistry circulates with the refrigerant and reacts ONLY at leak points where it contacts atmosphere — it does NOT clog TXVs, orifices, or evaporator coils like cheap stop-leak products. Anti-corrosion additive package prevents the underlying corrosion that caused the leak from spreading. Rated to 800 PSI for high-pressure R-410A systems. 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