| Anaerobic Thread Sealant | Methacrylate-based reactive resin | Threaded metal pipe fittings, hydraulic connections, pneumatic systems and instrumentation | Approximately −55 to 150°C | High pressure after full cure; rating depends on thread size, joint design and formulation | Cures in the absence of oxygen when confined between close-fitting metal surfaces | Excellent vibration resistance, low leakage risk and clean application | Not ideal for large gaps, porous materials or most plastic threaded joints | Steel, stainless steel, brass, copper and other active or treated metals |
| RTV Silicone Sealant | One- or two-component silicone elastomer | Flanges, covers, housings, HVAC joints, glazing, electrical enclosures and general maintenance | Approximately −60 to 260°C; specialized grades may be higher | Low to medium pressure; suitable for many static sealing applications | Moisture-cure for one-component grades; chemical or heat cure for two-component grades | Wide temperature range, excellent weathering and flexibility, good UV resistance | Lower tear strength than some elastomers; uncured acetic grades may corrode sensitive metals | Glass, aluminum, ceramics, coated metals and many construction materials |
| Polysulfide Sealant | Liquid polysulfide polymer | Fuel tanks, aircraft-style joints, insulating glass, expansion joints and chemical-service seams | Approximately −55 to 120°C | Low to medium pressure; particularly effective for fuel and fluid containment joints | Oxidative or chemical cross-linking, depending on the curing system | Strong resistance to fuels, oils, weathering and dynamic joint movement | Longer cure times, noticeable odor and generally lower high-temperature capability than silicone | Aluminum, steel, concrete, glass and primed construction substrates |
| Polyurethane Sealant | Moisture-curing polyurethane elastomer | Construction joints, vehicle bodies, transportation equipment, roofing and general assembly | Approximately −40 to 90°C; some grades reach about 120°C | Low to medium pressure; appropriate for static and movement joints | Moisture reaction produces an elastic cross-linked seal | High adhesion, abrasion resistance and movement capability; paintable in many formulations | Limited resistance to prolonged high heat and strong UV exposure unless specially formulated | Concrete, masonry, metals, wood, painted surfaces and selected plastics |
| MS Polymer Sealant | Silane-modified polymer | Building envelopes, façade joints, interior finishing, transport assembly and multipurpose bonding | Approximately −40 to 90°C; formulation-dependent | Low to medium pressure; primarily used for weatherproofing and joint sealing | Moisture-cure without isocyanate-based chemistry in many formulations | Low odor, good adhesion to damp or varied substrates, UV resistance and paintability | Not intended for continuous high-temperature service or high-pressure pipe sealing | Concrete, stone, metals, glass, wood and many coated surfaces |
| Acrylic Sealant | Water-based or solvent-based acrylic polymer | Interior cracks, trim, low-movement construction joints and general finishing work | Approximately −20 to 80°C | Low pressure; designed mainly for non-critical static joints | Water or solvent evaporation, followed by film formation | Easy to apply, economical, low odor for water-based grades and often paintable | Lower water resistance, flexibility and movement capability than silicone or polyurethane | Plaster, drywall, wood, concrete and porous building materials |
| Epoxy Resin Sealant | Two-component epoxy resin and curing agent | Rigid industrial repairs, casting voids, equipment housings, threaded components and chemical-resistant repairs | Approximately −50 to 150°C; high-temperature grades may exceed this range | Medium to high for rigid, properly designed joints; not suitable where substantial movement occurs | Chemical cross-linking between resin and hardener | High strength, strong chemical resistance and low shrinkage after cure | Rigid and comparatively brittle; surface preparation and accurate mixing are essential | Metals, ceramics, concrete, composites and selected engineered plastics |
| PTFE Thread-Sealing Paste | PTFE-filled non-curing or semi-curing paste | Pipe threads, valves, compressed-air lines, water systems and chemical-service connections | Approximately −50 to 150°C; grade-dependent | Medium to high pressure when used on correctly made threaded joints | Remains non-hardening or develops limited set, allowing later disassembly | Good chemical resistance, easy assembly and reliable thread lubrication | Not a substitute for a gasket or flange seal; compatibility must be checked for oxygen and aggressive chemicals | Steel, stainless steel, brass, copper and compatible plastic threads |
| Butyl Sealant | Polyisobutylene or butyl rubber compound | Roofing, window glazing, ductwork, vapor barriers and low-movement weather seals | Approximately −40 to 90°C | Low pressure; mainly used for air, moisture and vapor sealing | Typically remains permanently tacky or cures slowly, depending on formulation | Excellent moisture and vapor resistance, good adhesion and easy repositioning | Limited temperature range, creep under load and poor suitability for high-movement structural joints | Glass, aluminum, galvanized steel, roofing membranes and selected plastics |
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