We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Gray thread sealant in a 16 oz brush-top can

Hercules

Hercules Thread Sealant 16 oz Gray 15427

SKU CH-66Z6-C9N54

Non-hardening gray pipe thread sealant in a 16 oz brush-top can rated to 350 °F, 200 psi gas and 250 psi liquid

  • Non-hardening formula allows easy disassembly
  • Gray color identifies sealant on threaded joints
  • Works from 0 to 350 degrees Fahrenheit
  • Rated 200 psi gas and 250 psi liquid pressure
  • Compatible with steel, copper, brass and aluminum

Thread sealant for piping systems

Hercules Thread Sealant 15427 is a non-hardening pipe dope supplied in a 16 oz brush-top can. It is designed for professionals and DIY users who need reliable sealing on threaded connections carrying air, natural gas, steam or water across a wide temperature range.

Pressure and temperature boundaries

The sealant handles gases up to 200 psi and liquids up to 250 psi. It remains effective from 0 degrees F to 350 degrees F, so it suits both cold-water lines and high-temperature steam service without hardening or cracking over time.

Broad material compatibility

The gray formula works on aluminum, black iron, brass, copper, galvanized steel and stainless steel threads. The brush-top container allows direct application to fittings, reducing mess and ensuring even coverage during assembly or maintenance tasks.

How it compares

Measured against everything we stock in Caulking & Sealing Supplies, at today’s prices. Recalculated every night.

Price $6.99
Cheaper than about 87% of the 631 comparable items (median $16.99).

Specifications

Product
Brand nameHERCULES

Questions about this item

Should I pick the 16 oz brush-top can or a different size for pipe threads?

The 16 oz brush-top can supplies enough Pro Dope non-hardening sealant for many threaded joints on aluminum, brass, copper, galvanized or stainless steel pipe.

What does the 350 °F maximum temperature mean when the sealant is on a live steam line?

At up to 350 °F the gray compound stays pliable and keeps sealing steam threads without hardening or cracking.

How do the 200 psi gas and 250 psi liquid ratings limit the fittings I can seal?

The sealant is rated for 200 psi on air or natural gas lines and 250 psi on water or steam lines, so size your fittings within those pressures.

More in Caulking & Sealing Supplies

Similar items