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Black 1 oz bottle of Loctite 380 instant adhesive

Loctite

Loctite 380 Black Max Instant Adhesive 1 Oz Bottle Black

SKU CH-N6MR-EG3DR

Black instant adhesive bonds metal, plastic and rubber with 3750 psi shear strength and 90-second fixture time

  • Product typePipe Sealant Tape
  • Sets in 90 seconds for rapid repairs
  • Full cure in 24 hours for lasting bonds
  • Withstands -65.0 °F to 225.0 °F for extreme environments
  • 3750 psi shear strength handles heavy loads
  • Bonds metals, plastics and rubber for versatile use

Toughened instant adhesive for metal.

Loctite 380 Black Max is a black, toughened cyanoacrylate that bonds most metals, plastics and rubber in plumbing, irrigation and marine jobs. It reaches handling strength in 90 sec and full cure in 24 hrs. The formulation resists chlorinated or salt water exposure.

Thermal stability from -65.0 F to 225.0 F

The adhesive maintains its bond across a wide temperature range of -65.0 F to 225.0 F without degrading. It delivers an adhesive tensile shear of 3750 psi plus excellent peel and impact shear strength. No mixing or external heat is required during application.

One-ounce bottle with precision tip

The 1 oz bottle provides a controlled flow for accurate placement on small joints or repair areas. Its putty-like consistency reduces runs on vertical surfaces. The pack contains a single bottle with no additional tools or activators included.

How it compares

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

Price $29.99
Pricier than about 68% of the 631 comparable items (median $16.99).

Specifications

Product
Brand nameLoctite
Product typePipe Sealant Tape

Questions about this item

How do I apply the 380 Black Max adhesive and what step causes weak bonds?

Clean both surfaces, apply a thin layer to one side, press together and hold for 90 seconds; skipping the hold time prevents the initial cure from reaching full strength.

When will the 380 Black Max bond need replacement in a marine environment?

The adhesive resists salt water and chlorinated water, so the bond lasts until the joint sees impact or peel loads that exceed the 3750 psi shear rating.

What temperature limit does the 380 Black Max hit first during continuous engine-bay heat?

Sustained exposure above 225.0 F degrades the cured adhesive, making that the first thermal limit reached under constant high heat.

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