EverSeal 483 White.
UL-listed pre-applied thread sealant for fire sprinkler and water spray systems. Reusable, quick-cure, water-based. Rated for systems containing air, nitrogen, water, propylene glycol, and glycerol antifreeze solutions. Maintains an effective seal even after re-insertion — the operational requirement for fire protection assemblies that are periodically drained and recommissioned. 280°F rated.
Standard lead time 1–2 weeks — from receipt at our dock to coated parts back on yours. Rush accommodated on request. Customer pays inbound and outbound freight; F.O.B. St. Charles, IL.
FUNCTION
SEAL
SPRINKLER & WATER
APPROVAL
UL LISTED
SPRINKLER SYSTEMS
TEMP RANGE
280°FMAX
CONTINUOUS SERVICE
REUSABLE
YES
QUICK CURE
CHEMISTRY
WATER-BASED
NON-FLAMMABLE
UL-listed for fire sprinkler systems — and reusable when the system is serviced.
EverSeal 483 White is the fire-sprinkler-system member of the Federal Process EverSeal family — the pre-applied thread sealant specifically listed by UL for sprinkler and water spray systems containing the media that fire protection systems actually use: air, nitrogen, water, propylene glycol, and glycerol antifreeze solutions.
The 483 formulation is a water-based, quick-cure thread sealant that dries to a resilient film on the fitting thread. Water-based chemistry means it is non-flammable and safe to work with in fire protection system assemblies. Quick cure means the system can be filled and pressure-tested faster than slow-cure alternatives. The key operational characteristic for fire sprinkler applications is stated directly in the product description: the sealant maintains an effective seal even after re-insertion — the fitting can be removed, reinstalled, and the seal holds.
For fire sprinkler systems, this reusability is not optional — it is operationally required. Sprinkler systems are periodically drained for inspection, modification, or repair. Fittings are opened, pipes are modified, and fittings are reassembled. A thread sealant that fails after one disassembly cycle creates a liability in a safety-critical system. EverSeal 483 White is engineered to survive these service cycles and maintain the seal. The UL listing confirms this performance is validated, not assumed.
The UL listing for EverSeal 483 White covers a specific list of system media: air, nitrogen, water, propylene glycol antifreeze solutions, and glycerol antifreeze solutions. This media list is the specification boundary — for systems containing other media, verify UL listing scope before specifying. For gas-service applications (propane, natural gas), the correct product is EverSeal 183 Blue, which carries UL listing for gas service alongside NSF potable water approval. White is the standard color for fire protection system pipe sealants, consistent with industry expectations and inspector visibility requirements.
SPEC AT A GLANCE
Why engineers reach for EverSeal 483
UL-listed pre-applied thread sealant for fire sprinkler and water spray systems — reusable, quick-cure, white. The only product in the Bradley catalog specifically listed for sprinkler systems containing air, nitrogen, water, propylene glycol, and glycerol antifreeze.
- PRODUCTEverSeal 483 White
- BRANDFederal Process Corporation
- CHEMISTRYWater-based, quick-cure sealant
- UL LISTINGListed — sprinkler & water spray systems
- MEDIA COVEREDAir · Nitrogen · Water · Propylene glycol · Glycerol antifreeze
- TEMPUp to 280°F continuous
- VIBRATION RES.Not rated — pure sealant
- REUSABLEYes — maintains seal after re-insertion
- CUREQuick cure — ready for service fast
- COLORWhite — sprinkler system standard
- VS 183 BLUE483 = sprinkler UL, reusable, white, 280°F. 183 = gas UL + NSF, not reusable, blue, 300°F.
Federal Process EverSeal 483 by the numbers.
The full Fact Sheet and SDS are available below — these are the values engineers most often need before specifying. Anything missing, ask the engineering desk.
PRODUCT
Federal Process EverSeal 483WHITE
UL-listed pre-applied thread sealant from Federal Process Corporation, specifically listed for fire sprinkler and water spray systems. Reusable, quick-cure, white. Covers a defined range of system media.
CHEMISTRY
Water-BasedQUICK CURE
Water-based formula with quick cure time — described as maintaining an effective seal even after re-insertion. Non-flammable, safe for use in fire-protection system assemblies.
UL LISTING
UL ListedSPRINKLER SYSTEMS
UL listed for fire sprinkler and water spray systems containing air, nitrogen, water, propylene glycol, or glycerol antifreeze solutions. The UL listing is specific to this media list — confirm system media compatibility against the current UL listing before specifying for systems with other media.
MEDIA COMPATIBILITY
Air · Nitrogen · Water+ GLYCOL/ANTIFREEZE
Approved for systems containing: air, nitrogen, water, propylene glycol antifreeze solutions, and glycerol antifreeze solutions. The explicit media list is a key distinction — do not specify for system media not on this list without consulting engineering and verifying UL listing scope.
FUNCTION
Thread SealSPRINKLER SYSTEMS
Pure thread sealant for fire sprinkler pipe fittings. Does not provide vibration-resistant locking. The sealing function maintains integrity after the fitting is re-inserted — important for sprinkler systems that require periodic service access.
TEMPERATURE RANGE
Up to 280°FCONTINUOUS
Continuous-service ceiling to 280°F — slightly lower than EverSeal 183 Blue (300°F). Appropriate for sprinkler system operating temperatures including dry-pipe systems and systems with antifreeze solutions.
CURE TIME
Quick CureFAST TO SERVICE
Quick-cure formulation — the fitting can be placed in service faster than slow-cure thread sealants.
REUSABILITY
YesAFTER RE-INSERTION
Maintains an effective seal even after re-insertion — a key operational requirement for sprinkler systems that are periodically drained, retested, and recommissioned. Unlike EverSeal 183 Blue (single-install), the 483 is designed for service scenarios where fittings are opened and resealed.
VIBRATION RESISTANCE
NoPURE SEALANT
Not rated for vibration resistance. The primary requirement for sprinkler systems is fluid sealing under pressure, not vibration-resistant locking.
COLOR
WhiteSPRINKLER SYSTEM STANDARD
White is the conventional color for sprinkler system pipe sealants and thread compounds in the fire-protection industry. Consistent with system appearance expectations and inspector visibility requirements.
MANUFACTURER SPECS