Loctite SI5980 Silicone Flange Sealant – Black – 100ml (2064235)

Description

Genuine Loctite · Part no. 2064235

Loctite SI5980 is a 100ml black silicone flange sealant with good oil and glycol resistance and strong adhesion, built for pressed steel covers such as timing gear covers and oil sumps where the joint moves a lot and gaps can be large. It is also made to pass in-line low-pressure tests straight after assembly.

Good to know

• Why for pressed steel covers? Thin stamped covers flex and leave uneven gaps; this sealant bridges larger gaps and stays bonded as the joint moves.
• What does the low-pressure test claim mean? It is made to hold a low-pressure leak test right after assembly, so on a production line, or at home, the joint seals without waiting for a full cure.
• Is it suitable on cast gearbox housings? It will seal them, but Loctite's grey transmission silicone is the one designed for gearboxes and cast housings.
• Any preparation tips? Straighten any bent flange lips on the cover first, then clean and degrease both faces; sealant can't make up for a badly distorted cover.

Which one?

For transmissions and cast metal housings, Loctite SI5660 Silicone Sealant – Grey (2064521) is designed for them; for a blue multipurpose gasket, Loctite SI5926 Silicone Instant Gasket – Blue (1123349).

Key features

• 100ml
• Black flange sealant
• Good oil and glycol resistance
• Bridges large gaps with strong adhesion
• Withstands low-pressure tests straight after assembly

Specification