Shin-Etsu Silicone Greases and What Each One Is For

Sixyear

ShinEtsu Silicone Grease High Vacuum Sealing Compound HIVAC-G 100g

8.0/10Our score, based on listed specifications and buyer feedback

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ShinEtsu Silicone Grease High Vacuum Sealing

Best for: Sealing lab glassware and vacuum gaskets

Pros

• Rated for 10-6 Torr vacuum
• Low volatile content
• Heat and chemical stability
• 100 g size

Cons

• Sold by a reseller
• Listing weight looks wrong

The ShinEtsu Silicone Grease High Vacuum Sealing Compound HIVAC-G comes in a 100 g size and is listed under the seller brand Sixyear with Shin-Etsu named as the manufacturer. HIVAC-G is a vacuum grease. In simple terms, it seals joints so air cannot leak in when equipment pumps the air out, such as glass joints in a chemistry lab or gaskets on a vacuum chamber.

The description explains that HIVAC-G uses a specially refined silicone fluid mixed with silica powder. It is described as having excellent heat resistance, oxidative stability and chemical stability. Intensive refining keeps volatile content very low, which matters because anything that evaporates in a vacuum ruins the vacuum. The listing states it can reach high vacuums of 10-6 Torr, a very low pressure, and that it forms tight seals on gaskets and sliding mechanisms. The listing’s item weight of 0.01 ounces is clearly an error, given the 100 g title.

Choose this for laboratory glassware, vacuum desiccators and similar sealing jobs. It is not the right choice for hot bearings; the G-40 greases are built for that.

Honda

Honda Shin-ETSU Silicone Grease 08798-9013 (3.5 Oz Tube)

8.2/10Our score, based on listed specifications and buyer feedback

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Honda Shin-ETSU Silicone Grease 08798-9013

Best for: Car door seals and weather stripping

Pros

• Genuine Honda OEM part
• Made in Japan
• Easy 3.5 oz tube

Cons

• No technical data beyond basics

The Honda Shin-ETSU Silicone Grease 08798-9013 is a genuine Honda OEM part. OEM stands for original equipment manufacturer, meaning it is the part Honda itself supplies for its vehicles. It comes in a 3.5-ounce tube and lists Japan as the country of origin.

The listing names door seals, O-rings, rubber components and weather stripping as recommended uses. Silicone grease on rubber seals helps keep them soft, reduces squeaks and can stop doors from sticking to their seals in cold weather. The listing gives a flash point of 212°F, the temperature at which vapors can ignite. It does not provide other technical data, such as operating temperature range or base oil type.

This is the pick for car owners, especially Honda drivers, maintaining door seals, trunk seals and rubber O-rings. It is a practical stocking stuffer for a car enthusiast. For lab vacuum work, choose HIVAC-G instead. After greasing seals, a strong cleaner helps with messy hands; our heavy-duty degreaser guide covers options.

Kayney

Shin-ETS-u G-501 High Performance Silicone Grease Thermal Lubricant for Industrial & Electronics (1)

8.2/10Our score, based on listed specifications and buyer feedback

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Shin-ETS-u G-501 High Performance Silicone Grease

Best for: Electronics connectors and sliding parts

Pros

• Industrial and electronics use
• Corrosion protection
• Wide temperature stability claimed

Cons

• Sold by a reseller
• No temperature range given

The Shin-ETS-u G-501 High Performance Silicone Grease is listed under the seller brand KAYNEY, with Shinetsu named as the manufacturer, in an 80 g size. The listing describes it for industrial and electronic uses, including thermal interface support, connectors, sliding parts, sealing components and mechanical assemblies.

A thermal interface material helps heat move from a hot part to a heat sink by filling tiny air gaps between surfaces. The listing also says G-501 helps reduce friction, surface wear and oxidation, and keeps consistent viscosity (thickness) across a broad temperature range. However, it does not state the actual temperature range or thermal conductivity figures, so if you need exact numbers for a critical job, confirm them with the manufacturer’s data sheet.

This suits hobbyists and technicians working on connectors, switches and small mechanisms. It is not a vacuum grease and not a dedicated high-temperature bearing grease.

Oilheyt

Shin-ETSU HIVAC-G Vacuum Grease, 100 g, Laboratory and Industrial Use

8.2/10Our score, based on listed specifications and buyer feedback

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Shin-ETSU HIVAC-G Vacuum Grease

Best for: Buying HIVAC-G from a second seller

Pros

• Shin-Etsu HIVAC-G model
• 100 g package
• Lab and industrial use

Cons

• Very little product detail
• Reseller listing

The Shin-ETSU HIVAC-G Vacuum Grease is the same HIVAC-G model in a 100 g package, sold under the seller brand OILHEYT. The listing says it is intended for laboratory and industrial equipment and applications, and advises verifying component compatibility before electronic use.

This listing is thin. It does not repeat the vacuum rating or composition details found in the first HIVAC-G listing, and it describes the form as a paste. Because it names the same HIVAC-G model, the underlying product should serve the same vacuum sealing purpose, but the listing itself does not confirm the technical specifications.

Consider this listing if you want HIVAC-G and prefer this seller or availability. If you want the fuller description in the listing, the first HIVAC-G option provides more detail.

Best for: Hot-running bearings and gears

Pros

• High-temperature bearing grease
• Water resistant
• Silicone base

Cons

• Package size not stated
• Operating range not stated

The Shin-ETSU G-40M High-Temperature Grease for Bearings is sold under the seller brand OILHEYT. It is a silicone-based, water-resistant grease intended for bearings and gears used in elevated temperatures, and for general mechanical sealing.

A bearing grease stays in place between rolling or sliding metal parts to reduce friction and wear, and a high-temperature grease is formulated so it does not thin out or break down as quickly when parts get hot. The listing is honest that the package size, operating range and equipment compatibility are not stated and need confirmation.

This suits someone servicing bearings or gears in hot machinery who has already confirmed that G-40M is the specified grease. For a clearly stated size, the G-40L listing gives 1 kg. A grease gun makes applying bearing grease much easier; see our cordless grease gun guide.

Best for: Workshops servicing many sealed bearings

Pros

• Large 1 kg format
• High moisture resistance
• MIL-L-15719A performance claim

Cons

• Temperature range not stated
• Too much for home use

The Shin-ETSU G-40L High-Temperature Grease comes in a 1 kg format from the seller brand OILHEYT, with Shin-Etsu named as the manufacturer. It is intended for bearings, gears and related industrial mechanisms.

The description says it has high thermal oxidation stability, high moisture resistance, a wide operating temperature range and moderate softness, and is suited especially to sealed bearings in high-temperature environments. It also states it has the performance of MIL-L-15719A specifications, a military standard for high-temperature bearing grease. The feature list, though, says temperature range and composition are not stated, so confirm the exact range from Shin-Etsu’s data if it matters.

This is for workshops, maintenance teams or motor rebuilders who need a large supply. A home user will likely never use a full kilogram; the G-40M may suit smaller jobs once you confirm its size.