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Black 90 mL pressurized can with trigger for RTV gasket maker

Loctite

Loctite 743912 SI 5900 RTV Gasket Maker 90 mL Black

SKU CH-D74V-TG3FF

Oil-resistant RTV gasket maker in a 90 mL pressurized can cures at room temperature in one day with a 15-minute working time

  • Ready to assemble in 15 minutes working time
  • Withstands 400 °F continuous operating temperature
  • Seals gaps up to 0.25 inch without leaking
  • Resists oil on ceramic, glass, metal and plastic
  • 90 mL pressurized can for controlled application

Loctite SI 5900 RTV Gasket Maker 90 mL

This anaerobic sealant forms flexible, oil-resistant gaskets on ceramic, glass, metal and plastic components. It suits mechanics and technicians who need reliable sealing on engine, transmission or differential assemblies without cutting pre-formed gaskets.

Working time 15 minutes full cure one day

The paste remains workable for 15 minutes at room temperature before skinning over and reaches full cure in one day. It withstands continuous temperatures from -65 °F to 400 °F and fills gaps up to 0.25 in without slumping or shrinking.

Replaces cut gaskets and paper seals

Use it instead of traditional paper, cork or rubber gaskets where a formed-in-place bead is faster and more adaptable. The jump is worthwhile when flange surfaces are irregular, when disassembly is frequent or when an instant seal is required before clamp-up.

How it compares

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

Price $35.99
Pricier than about 72% of the 631 comparable items (median $16.99).

Specifications

Product
Brand nameLOCTITE

Questions about this item

How do I apply the gasket maker from the pressurised can with trigger and what step is commonly missed?

Apply a continuous bead onto clean surfaces, assemble within the 15 min working time, then allow 1 day for full room-temperature cure; the step often missed is waiting the full cure before exposing the joint to oil or heat.

What maintenance or replacement will the cured seal need later?

The cured RTV remains flexible from -65 °F to 400 °F and is oil-resistant, so it requires no scheduled replacement unless the joint is disassembled or the seal is physically damaged.

What limit appears first when the sealed joint sees sustained high temperature?

The maximum operating temperature of 400 °F is the first limit; exceeding it can degrade the silicone and compromise the seal.

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