RTV Silicone Sealants
Room temperature vulcanizing (RTV) silicone gasket makers are used to form gaskets in place on engines, flanges and housings. The manufacturer's published RTV range is led by high temperature products, including the JSG105 hi-temp gray RTV gasket maker and the JSG103 hi-temp flex RTV gasket maker, each described in the manufacturer's own words below.
RTV products differ in colour, temperature resistance and cure profile, so the exact code matters. Nothing on this page states a temperature rating or cure time beyond what the manufacturer publishes for a named code; confirm the requirements of your joint — temperature, oil resistance and gap size — before ordering.
RTV is used both for formed-in-place gaskets and for sealing joints. The two uses need different bead shapes and cure conditions: a gasket bead is compressed between flanges and cures slowly inside, while a joint bead stays exposed to air and moisture. Describe which use you need when asking for a product recommendation.
Products in this range
The products below are described in the manufacturer's own words. Specifications beyond what is quoted here are not stated on this site; confirm any technical requirement for your application before ordering.
JSG105 HI-TEMP GRAY RTV GASKET MAKER
Manufacturer description: JSG105 is a high temp,oil resistant,antifreeze resistant,RTV silicone up to 650℉(343℃).
Listed details: Typical Colors Gray
Features listed by the manufacturer:
- Features Effective up to 650°F (343°C)
- Professional use
- High grade
- Neutral cure
- Odorless
- Sensor safe
Applications listed by the manufacturer: Transmission pans Valve covers Oil pans Water pumps Gearboxes Intake manifold end seals Stamped sheet metal covers Compressors Gearboxes Thermostat housings Exhaust manifolds Pump housings Machine tools
Confirm colour, pack size and availability for this exact code before ordering.
JSG103 HI-TEMP FLEX RTV GASKET MAKER
Manufacturer description: JSG103 is a premium grade, high temp RTV silicone up to 500℉ (260℃).
Listed details: Typical Colors Blue
Features listed by the manufacturer:
- Features Effective up to 500°F (260°C)
- Super oil/grease resistance
- Oil pump flanger and transmission pans
Applications listed by the manufacturer: Timing gear covers transmission pans valve covers oil pans water pumps intake manifold end seals stamped sheet metal covers gearboxes thermostat housings ad differential covers
Confirm colour, pack size and availability for this exact code before ordering.
JSG101 HI-TEMP RED ULTRA RTV GASKET MAKER
Manufacturer description: JSG101 is a high temp RTV silicone up to 650℉(343℃).
Listed details: Typical Colors Red
Features listed by the manufacturer:
- Features Effective up to 650°F (343°C) intaker/exhaust manifolds
- Thermostat housings
- Low volatiles
Applications listed by the manufacturer: Timing gear covers transmission pans valve covers water pumps gearboxes intake manifold end seals compressors thermostat housings differential covers drive housings exhaust manifolds and machine tools
Confirm colour, pack size and availability for this exact code before ordering.
JSG102 HI-TEMP BLACK FAST RTV GASKET MAKER
Manufacturer description: JSG102 is a high temp, high strength, high density, RTV silicone up to 500℉ (260℃).
Listed details: Typical Colors Black
Features listed by the manufacturer:
- Features Effective up to 500°F (260°C)
- General purpose
- Valve covers
- Instantly tough leak-proof
- Fast curing
- Remain flexible
Applications listed by the manufacturer: Timing gear covers valve covers water pumps gearboxes compressors gearboxes differential covers drive housings exhaust manifolds and machine tools
Confirm colour, pack size and availability for this exact code before ordering.
Related products in the same family
Other products in this family, described in the manufacturer's own words:
JL800 PREMIUM WEATHERPROOF SILICONE SEALANT
Manufacturer description: JL800 is a premium grade,weathering, high modulus +/- 25% movement, neutral cure silicone sealant for construction.
Listed details: Typical Colors White, Clear, Black, Gray, Brown, etc
Features listed by the manufacturer:
- Features Low Odor
- Improved oil resistance
- High movement ability 25HM
Applications listed by the manufacturer: Glazing and weather sealing Jointment in curtain wall Aluminum composite panel Building facades
Confirm colour, pack size and availability for this exact code before ordering.
JL180 NON-STAINING STONE SILICONE SEALANT
Manufacturer description: JL180 is a high modulus +/- 25% movement, non-staining, neutral cure silicone sealant for stone sealing.
Listed details: Typical Colors Black, White, Gray
Features listed by the manufacturer:
- Features UV resistance
- Unprimed adhesion to masonry & concrete
- None corrosive to substrates
Applications listed by the manufacturer: Marble natural stone granite and masonry
Confirm colour, pack size and availability for this exact code before ordering.
JL719 ROOF & GUTTER WEATHERING SILICONE SEALANT
Manufacturer description: JL719 is a weathering, high strength, neutral cure silicone sealant/adhesives for roof and gutter.
Listed details: Typical Colors Black, White, Gray
Features listed by the manufacturer:
- Features UV resistance
- Waterproof
- Low odor
- Weatherproof
Applications listed by the manufacturer: PVC & Metal roofs most gutters and cement sheeting
Confirm colour, pack size and availability for this exact code before ordering.
JL550 MIRROR FIX
Manufacturer description: JL550 is a special mirror mounting sealant/adhesive, based on alkoxy silicone.
Listed details: Typical Colors White
Features listed by the manufacturer:
- Features Mirror expert
- No desilver mirrors
- Long-term maintain
- Non corrosive to metals
- Non yellowing
Applications listed by the manufacturer: Mirror installations Bonding mirror to painted surfaces plaster metal or wood
Confirm colour, pack size and availability for this exact code before ordering.
Questions to confirm for your order
- Confirm the exact product code, colour and pack size for your order.
- Confirm the minimum order quantity and lead time for your quantity.
- Confirm which documents you need with the shipment. Certificates available upon request.
- Confirm suitability for your substrate and application in writing before ordering.
Frequently asked questions
Which product code should I choose?
For rtv silicone sealants, the code matters more than the generic type: colour, pack size and published description differ by code. Compare the quoted descriptions on this page, then confirm your shortlist by inquiry.
What colours and pack sizes are available?
Colours and pack sizes are stated per product code in the manufacturer's listings where published. Where they are not stated, ask for them in your inquiry before ordering.
Can I get a sample before a bulk order?
Ask about samples in your inquiry, together with the product code, colour and quantity you need. Samples let you check colour, adhesion and handling on your own substrates before committing to volume.
Related pages
Confirm before you order
Before ordering, ask about the following for the exact product you need: product code and colour, pack size, minimum order quantity, lead time, and the documents you need with the shipment. Certificates available upon request. Email [email protected] to ask whether your requested products and documents are available.