Permatex PER82180 3 Oz. Ultra Black Silicone Gasket Maker

The Permatex PER82180 is a 3 oz Ultra Black silicone gasket maker.

The Ultra designation is the specification and it identifies this as a sensor-safe formulation — which is the most consequential distinction in the RTV category on any modern vehicle.

The reason is chemistry. Many conventional RTV silicones cure by releasing acetic acid; the vinegar smell while curing is exactly that. In an open joint it evaporates and nothing happens. In a closed system — an engine's crankcase, an intake, anything sharing air with an oxygen sensor — the acid attacks metals and poisons the sensor. A poisoned oxygen sensor throws a fault code and gets replaced, and nobody connects it to the gasket maker used three months earlier.

Sensor-safe formulations cure without releasing it. On anything with engine management, that is not optional.

Ultra Black is Permatex's oil-resistant sensor-safe grade, which puts it on oil pans, timing covers, and transmission housings — flanges that live in oil.

What RTV gives generally is movement. It cures flexible and stays flexible, accommodating the expansion and vibration that would crack a rigid sealant.

Surface preparation decides whether it holds. Clean, degrease, and let it cure before filling the system.

Applications include oil pans, timing covers, and engine gasketing.

Brand

Permatex

SKU

PER82180

Category

Adhesives, Sealants & Tapes

Weight

0.27 lbs

Dimensions

8.00 x 3.50 x 1.25

Price

$9.00

Availability

Call for pricing

Rating

4.68 / 5.0