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Niel Seal Gasket & Joint Sealing Compound Medium Weight - 1 Lb

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Part numbers : RX1-04-03972 , N25-66 , 04-03972
Unit of Measure: EA

37.72 EUR / EA 37.72 EUR 37.72 € excl. VAT

37.72 EUR / EA excl. VAT

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Availability
Up to 4 EA ready to ship on Thursday 2026-10-15
Order before 16:00 CET on Tuesday 2026-10-13
Up to 6 EA ready to ship on Monday 2026-10-19
Order before 16:00 CET on Tuesday 2026-10-13
63 EA available on request, inbound freight fee of 60 EUR applies
Special order from vendor stock.

Niel Seal N25-66 is a medium-weight gasket and joint sealing compound supplied in a 1 lb (0.45 kg) container. It is described as a flexible, non-hardening compound for creating leak-resistant seals on machined joints and gasket applications.

  • Manufacturer part number: N25-66
  • Medium-weight formulation
  • Suitable for use with a gasket or as a gasket material
  • Intended for general gasketing, machine joints, pipe threads, and imperfect or uneven surfaces
  • Can be used as a sealing compound, caulking compound, corrosion preventative, or lubricant where appropriate for the maintenance task

Please confirm suitability for the specific material, fluid, temperature, and maintenance procedure before use.

Overview

N20-66 Seals threaded pipe joints, machined surfaces and flare nuts. Used on engine rear sections, sump gaskets, triple connector threads, channel plugs, air control valves, dump valve guides, water separator glasses, and for all metal-to-metal unions with any kind of gasket.

A special paste-type density for threaded pipe joints, gasoline and carburetor connections, water heater fittings, gas range valves, etc.

Features

  • Use as a joint sealing and caulking compound, corrosion preventative and lubricant
  • For all metal-to-metal unions with any kind of gasket
  • Withstands extreme temperatures
  • Prevents corrosion and freezing of metal parts
  • Nielseal is unaffected by water, oil, ammonia, glycerin, steam, all types of gas, exhaust fumes, and most hard to hold liquids.
  • Withstands extreme temperatures and pressure
  • Will not shrink, crack or crumble
  • Seals threaded pipe joints and machined surfaces, flare nuts and tubing
  • For all metal to metal unions with any kind of gasket
  • Prevents corrosion.
  • Expands and contracts with temperature changes without affecting seal

Specifications

N20-66: Light Weight

  • Seals threaded pipe joints, machined surfaces and flare nuts. Used on engine rear sections, sump gaskets, triple connector threads, channel plugs, air control valves, dump valve guides, water separator glasses, and for all metal-to-metal unions with any kind of gasket.

N25-66: Medium Weight

  • Gasket and Joint Sealing Compound
  • Flexible, Non-Hardening, Leakproof Seal for Machined Joints and Gasket Applications.

Applications

N20-66: Light Weight

  • Is a flexible compound for use as a joint sealing compound, caulking compound, corrosive preventative, lubricant, threaded joint dressing, insulating material or filler with packing. Used on head and manifold gaskets of automotive and aircraft engines, water heater fitting gaskets, gas range valves and fitting, pipe threads on dry-cleaning solvent filters, railroad and truck air-brakes, fittings and lines, etc. For all metal-to-metal unions with any kind of gaskets.

N25-66: Medium Weight

  • Seals with a gasket or as a gasket. Seals pumps, tanks, pressed plates, covers, pans, etc for pipe threads and imperfect or uneven surfaces. For general gasketing and machine joints, cylinder heads, manifolds, differentials, transmission, muffler joints, radiator hose connections, and as a filler for water pump packing. Used as a gasket for gear housing that must retain oil and grease on appliances of all types.



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