1/2 pt. Block (screw cap with brush) Zoom

1/2 pt. Block (screw cap with brush)


Brand: Hercules

Qty Price
/ each
$250.80 / box (24 units x $10.45)
In Stock! Ships in 24-48 Hours
(8 Available)



Size: 1/2 Pint
Max Pressure (PSI): 12000 psi (Hydraulic)
Temperature Range (F): -50°-450°F

Description for Hercules 15707


  • All-purpose, tough, pliable seal for joints, valves, flanges, and gaskets
    Puts joints into service in minutes
  • An excellent gasket seal
  • Sets up quickly and dries to form a very tough, yet flexible seal which will not harden, crack, crumble or shrink.
  • Seals old or worn fittings
  • Ideal for pumps, tanks and equipment carrying steam, water, oil, gasoline, fuel oil, hydraulic fluids, natural and LP gas (vapor state), anti-freeze, refrigerants except ammonia, lubricants, glycerin, solvents, brine and other gases, liquids and chemicals (see spec sheet for specifics).
  • For use on all metals, including galvanized steel, black iron, aluminum, copper, brass, stainless steel, and on PVC, ABS, and CPVC plastics (for use on specific brands of CPVC pipe, verify suitability with pipe manufacturer).
  • Provides leak-proof resistance to high pressure, temperature, expansion, contraction and extreme vibration. Grit-free; non-separating, distinctive non-runny consistency.
  • Can easily be cleaned from tools and hands with isopropyl alcohol or Hercules for Hands towels.
  • Temperature range: -50° to 450° F (on steel pipe)
  • Pressure: 12,000 psi (hydraulic), 2600 psi (gas)
  • Conforms to: Mil. Spec. Mil-S-45180 D. Blue.

1/2 pt. Block (screw cap with brush)


by PowerReviews
Hercules1/2 pt. Block (screw cap with brush)

(based on 3 reviews)

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Reviewed by 3 customers

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(0 of 1 customers found this review helpful)


It works

By zorro6204

from Bellevue, WA

Verified Reviewer

Comments about 1/4 pt. Block (screw cap with brush):

I hate tapered thread connections, I do everything by the book, a wrap of teflon tape in the right direction, in back of the engagement threads, supplemented by some pipe compound a little further back. 50% of my connections weep. I don't even know why they make that stuff anymore.

Anyway, sometimes you have no choice, and after suffering through a weeping expansion tank connection (which had to be located below the hwt, meaning it had to be drained), I tried this. Voila, no more leaks.

Note I let the product cure or dry (or whatever) for as long as possible, overnight is good. Also, I tried Grrip with equal success, not sure there's any difference.

Finally, the brush in the can stinks, it's a bloody mess. I cut it off and strap a shortened art brush to the can with a hair scrunchy, much cleaner. This stuff sticks to surfaces like enamel paint.


thread sealer

By G-P mechanic

from North Carolina

Verified Buyer

Comments about 1/4 pt. Block (screw cap with brush):

I used this on threads of 3/8" studs that screwed into an engine block to keep coolant from leaking. these studs are to hold a cylinder head on an antique car. I tried a couple of other things that didn't work but this worked great.


Have been using this product for years

By Allan

from Florida

Verified Buyer

Comments about 1 pt. Block (screw cap with brush):

We thread steel tubes then couple and cap them and this product has always prformed well, sealing the threads with cutting oil residue on the pipes. We have tried other products and always come back to this one. When our normal supplier stopped carry this product we went right to the internet to find a new source of supply, as we wanted to stay with what worked best.

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