23070 Oakgrove Rd 100
NAPA Auto Parts NAPA Auto Parts Herndon
23070 Oakgrove Rd 100
Sterling,  VA  20166
(703) 707-0800
Reserve Online Participant
Store Hours
Mon-Fri:8:00 AM-7:00 PM
Sat:8:00 AM-5:00 PM
Sun:9:00 AM-4:00 PM
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Hi Temp Metal Repair Compound JB Weld
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Hi Temp Metal Repair Compound JB Weld

Part #: NCB 37901
Line: NAPA Consumer Brands
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Features & Benefits

Warranty: Standard : No Warranty, Expressed or Implied


ExtremeHeat™ is formulated to allow for repairs to iron, steel and metal in high temperature environments (1000°F / 537°C). When fully cured, this metallic compound can be drilled, machined or sanded. It is great for repairing cracks, small gaps, seam connections or holes in exhaust manifolds, pipe connections, mufflers, catalytic converters, outdoor grills, fire boxes, gas and commercial furnaces and water heaters. This product is water based, non-flammable and contains no solvents or Volatile Organic Compounds (VOCs).

  • Can be used for filling cracks and holes on metal surfaces
  • Set time is 1 hour and cures in 24 hours
  • Dries dark gray
  • Made in the USA


Brand JB Weld
Container Size 3 fl oz (US)
Liquid Reactor Hardener Included No
Contents (1) ExtremeHeat Container
Maximum Drying Time 24 hr
Minimum Drying Time 1 hr
Color Gray
Manufacturer JB Weld
Manufacturer Part Number 37901
VMRS Code 053998018
SDS Required Yes
Sandable Yes

Safety Information