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Blue RTV gasket maker paste in 70 mL tube

Loctite

Loctite 135504 SI 587 Blue RTV Gasket Maker 70 mL

SKU CH-SV34-QEPJJ

Blue RTV gasket maker cures at room temperature in one day, resists oil to 500 °F and fills gaps up to 0.25 in

  • Forms reliable gaskets in 10 minutes working time
  • Withstands -75 °F to 500 °F operating range
  • Low-odour, non-corrosive oxime silicone formula
  • Fills gaps up to 0.25 in for leak-free seals
  • Oil-resistant paste cures fully at room temperature in 1 day

Loctite SI 587 Blue RTV Gasket Maker

This Loctite SI 587 is a blue room-temperature vulcanising silicone paste designed to form flexible, oil-resistant gaskets directly on engine and transmission flanges. It suits professional mechanics and experienced DIYers who need a reliable formed-in-place seal for automotive assemblies.

Thermals, noise and power draw

As a non-curing paste until exposed to atmospheric moisture, the material draws no power and produces no noise during application or service. It withstands continuous operating temperatures from -75 °F to 500 °F and achieves full cure within one day at room temperature.

70 mL tube and 10-minute working time

The 70 mL tube provides enough volume for multiple gasket repairs while the 10-minute working window allows precise positioning of parts before the surface begins to skin over. Its oxime silicone chemistry ensures non-corrosive curing on aluminium and sensitive metals without releasing acetic acid.

Highlights

  • Forms reliable gaskets in 10 minutes working time
  • Withstands -75 °F to 500 °F operating range
  • Low-odour, non-corrosive oxime silicone formula
  • Fills gaps up to 0.25 in for leak-free seals
  • Oil-resistant paste cures fully at room temperature in 1 day

Specifications

BrandLOCTITE

Questions about this item

How do I install the Loctite SI 587 Blue RTV Gasket Maker from the 70 mL tube, and what step do people often get wrong?

Apply a continuous bead to one clean surface, assemble parts within the 10 min working time, and torque bolts evenly; the step often missed is waiting the full 1 day for full cure before returning the assembly to service.

What maintenance or replacement will the cured Loctite SI 587 gasket need later?

The cured Oxime Silicone gasket resists oil and operates from -75 to 500 Degrees F; inspect it during routine service and replace only if leakage, cracking, or hardening appears — no scheduled replacement interval is required.

What limit appears first when the Loctite SI 587 gasket sees sustained high-temperature use?

The maximum operating temperature is 500 Degrees F; sustained exposure at or above this limit will degrade the silicone first, leading to loss of seal integrity before other factors.

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