SEALANTS AND LUBRICANTS
Nylog® sealants and Viper® silicone grease are trusted by HVAC/R, plumbing, and mechanical professionals for sealing, lubricating, and preventing leaks in critical connections. These products cover everything from refrigerant flare fittings to gas pipe threads, water connections, O-rings, electrical components, and food-grade lubrication. Whether you are working with mineral oil systems, POE systems, threaded pipe, gaskets, or precision seals, these products provide non-hardening, non-drying protection that keeps systems leak-free while allowing easy disassembly. Designed for technicians who demand reliability, Nylog sealants and silicone grease help ensure proper assembly, long-term sealing, and safe operation across HVAC, refrigeration, plumbing, gas, water, and electrical applications.
Nylog Red – Gasket & Thread Sealant for Mineral Oil Systems
Nylog Red is a viscoelastic gasket and thread sealant made from refrigeration-grade mineral oil and designed for use on HVAC and refrigeration systems that use mineral oil or alkylbenzene lubricants. It is ideal for flare fittings, threaded connections, gaskets, schrader valves, and o-rings where a gas-tight seal is required. Because it is made from refrigerant oil, Nylog Red never hardens, never contaminates the system, and will not clog valves or restrict flow. It fills microscopic imperfections on sealing surfaces while lubricating threads to prevent damage during assembly. Nylog Red is commonly used on R-22, R-12, ammonia, and hydrocarbon systems and is widely trusted for leak prevention in service and installation work.
Nylog Blue – Universal Gasket & Thread Sealant for Modern Refrigerants
Nylog Blue is a synthetic POE-based gasket and thread sealant designed for modern refrigerants and oils, including R-410A, R-134a, HFO blends, and CO₂ systems. It is fully miscible with POE, PVE, and PAG oils, making it the preferred sealant for today’s air conditioning and refrigeration equipment. Nylog Blue provides a flexible, non-hardening seal on flare fittings, threaded joints, o-rings, and service valves while also lubricating components to prevent damage during assembly. Because it remains fluid and compatible with system lubricants, it will not clog TXVs, filter driers, or small passages. Nylog Blue is widely considered the universal HVAC sealant for installation, repair, and maintenance work.
Nylog White – Non-Hardening Thread Sealant for Gas, Water, Air & Glycol
Nylog White is a non-drying, PTFE-enhanced thread sealant designed for sealing pipe threads, fittings, gaskets, and o-rings in gas, water, steam, air, and glycol systems. Unlike oil-based Nylog products, Nylog White uses a silicone and PTFE blend that provides a durable, flexible seal without hardening or cracking. It is ideal for natural gas piping, hydronic systems, compressed air lines, water connections, and general mechanical assembly where a reliable pipe thread sealant is required. Nylog White is safe for plastics, rubber, and metal, rated for extreme temperatures, and approved for food-area use, making it a versatile choice for HVAC, plumbing, refrigeration, and mechanical service work.
Viper Silicone Grease – Multi-Purpose Food-Grade Lubricant & Seal Protector
Viper Silicone Grease is a high-purity, food-grade lubricant designed for sealing, protecting, and lubricating o-rings, gaskets, valves, electrical connections, and mechanical components. It is waterproof, chemically resistant, and safe for use on plastics, rubber, metal, and electrical parts. Silicone grease is commonly used on water fixtures, ice machines, food equipment, vacuum systems, electrical connectors, and refrigeration components where a clean, non-reactive lubricant is required. With high dielectric strength and NSF H1 food-grade approval, Viper Silicone Grease is ideal for service technicians who need a reliable lubricant that will not dry out, wash away, or damage sensitive materials.
FAQ – Nylog Sealants & Silicone Grease
What is the difference between Nylog Red, Blue, and White?
Nylog Red is mineral-oil based for older refrigerant systems, Nylog Blue is POE-based for modern refrigerants, and Nylog White is a PTFE thread sealant for gas, water, and mechanical piping applications. Each product is designed for different system types to ensure compatibility and leak-free sealing.
When should I use Nylog instead of Teflon tape?
Nylog is preferred when sealing flare fittings, gaskets, o-rings, or precision threaded connections where tape can shred or contaminate the system. Nylog provides lubrication and sealing without hardening or breaking apart.
Can Nylog enter the refrigeration system safely?
Yes. Nylog Red and Nylog Blue are made from refrigeration-grade oils and are fully compatible with system lubricants. Small amounts entering the system will not clog valves or cause restrictions.
What is Nylog White used for?
Nylog White is used as a pipe thread sealant for gas lines, water systems, compressed air, steam, and glycol piping. It replaces traditional pipe dope or PTFE tape and remains flexible without drying out.
What is silicone grease used for in HVAC and plumbing?
Silicone grease is used to lubricate o-rings, gaskets, valves, and seals. It protects rubber parts, prevents leaks, and allows smooth assembly without damaging components.
Is silicone grease safe for electrical connections?
Yes. Silicone grease has high dielectric strength and is safe for electrical connectors, switches, and terminals where moisture protection and insulation are needed.
Can these products be used on plastic and rubber components?
Yes. Nylog White and silicone grease are safe for plastic and rubber. Nylog Red and Blue are also safe for seals used in refrigeration systems when applied correctly.
Do Nylog sealants dry or harden over time?
No. All Nylog sealants remain flexible and non-hardening, which allows connections to stay sealed while still being serviceable in the future.
Are these products food-safe?
Nylog Red, Nylog Blue, Nylog White and Viper Silicone Grease are NSF registered for incidental food contact and Kosher, making them suitable for ice machines, beverage equipment, and food processing applications, and HVAC/R systems.
Why do HVAC technicians use Nylog?
Technicians use Nylog because it prevents leaks, protects threads and seals, and remains compatible with system oils and materials, making it one of the most reliable sealants available for HVAC and refrigeration work.