Loctite SI 5699 Grey RTV Silicone Gasket Maker 300ml
Available
Loctite SI 5699 is a grey, one-component oxime silicone that cures with moisture from the air (RTV). The paste is thixotropic, so it stays where it is dispensed.
It is designed mainly for sealing rigid flanges, such as transmissions and cast metal housings, where excellent oil resistance is needed. The oxime cure is non-corrosive. It is a sealant, not a structural adhesive: its lap shear strength is low.
Where this product is used
- Rigid flange sealing on transmissions
- Sealing cast metal housings
- Flanges that need excellent oil resistance
- Assemblies where a non-corrosive cure is needed
Features
- One component, no mixing
- Grey, thixotropic paste
- Room temperature vulcanising (RTV) moisture cure, oxime silicone
- Tack-free in 30 minutes or less at 25 °C and 50 % RH
- Non-corrosive cure
- Excellent oil resistance on rigid flanges
- Cured Shore A hardness 45 to 75, elongation at least 100 %
Key specifications
| Specification | Detail |
|---|---|
| Brand | Loctite |
| Chemical type | Oxime silicone |
| Technology | Silicone, one component, RTV (moisture cure) |
| Appearance | Grey paste (uncured), thixotropic |
| Specific gravity (20 °C) | 1.45 |
| Extrusion rate (Semco cartridge, 0.62 MPa, 15 s, 25 °C) | 200g/min or more |
| Tack-free time (25 °C, 50 % RH) | 30 minutes or less |
| Hardness, Durometer A (ISO 868, 1 week at 25 °C, 50 % RH) | 45 to 75 |
| Elongation (ISO 37, 1 week at 25 °C, 50 % RH) | At least 100 % |
| Tensile strength (ISO 37, 1 week at 25 °C, 50 % RH) | At least 2.4 N/mm² |
| Lap shear (14 days at 23 °C, 60 % RH, 0.5mm gap) | Aluminium 0.1 to 0.7; zinc dichromate 0.7 to 1.5; grit-blasted mild steel 1.3 to 2.1; abraded aluminium 1.3 to 2.0 N/mm² |
| Approvals | NSF International registered to NSF Category P1, a sealant where there is no possibility of food contact in and around food processing areas (regional approval; contact the local Henkel Technical Service Center) |
| Storage | 8 °C to 21 °C, unopened, dry |
Choosing the right option
Other one-component silicone gasket makers in the Loctite range include Loctite SI 587 Blue High Performance RTV Silicone Gasket Maker 95g and Loctite SI 5900 Flange Sealant 300ml.
See also: Loctite SI 587 Blue High Performance RTV Silicone Gasket Maker 95g, Loctite SI 5900 Flange Sealant 300ml, Loctite 598 Black RTV Silicone Gasket Maker 95g, Loctite 587 Blue Maxx Silicone Flange Sealant 300ml.
| Option | Part number | SKU |
|---|---|---|
| No Value | 5699-300ML-LOC | A0049943 |
| Sealant | 5699-95GM-LOC | A0049936 |
Using it
Mate the parts within a few minutes of dispensing, because the moisture cure starts as soon as the paste is in the air.
Allow the sealant to cure (for example seven days) before heavy service loads. Excess can be wiped off with non-polar solvents.
It is a one-part oxime RTV silicone and is non-corrosive.
It is not recommended for contact with gasoline (petrol).
Storage and handling
Store unopened in a dry location, ideally between 8 °C and 21 °C. Storage below 8 °C or above 28 °C can adversely affect the properties of the product.
Limits and safety
Not recommended for pure oxygen or oxygen-rich systems, as a sealant for chlorine or other strong oxidising materials, or for contact with petrol. Lap shear strength is low (0.1 to 2.1 N/mm² depending on the substrate), so do not use it as a structural bond.
It gives hot strength and heat ageing charts only, so check these before using it on hot flanges.
This is a regional approval.
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Loctite SI 5699 Grey RTV Silicone Gasket Maker: No Value
SKU: A0049943 | Model: 5699-300ML-LOC
Loctite SI 5699 grey oxime RTV silicone gasket maker, 300ml. Tack-free in 30 minutes or less.