🔥 Seal the deal with J-B Weld—where strength meets heat resistance!
J-B Weld 31314 High Temperature RTV Silicone Gasket Maker is a professional-grade, red RTV silicone sealant designed to withstand continuous temperatures up to 550ºF and intermittent spikes to 650ºF. Its moisture-cure formula creates a waterproof, crack-resistant seal ideal for automotive and industrial applications. Trusted for over 40 years, this 3 oz. tube delivers a durable, sensor-safe bond that’s perfect for DIY enthusiasts and pros alike.
| Manufacturer | JBWeld |
| Brand | J-B Weld |
| Model | 31314 |
| Product Dimensions | 5 x 4 x 16 cm; 90 g |
| Item model number | 31314 |
| Exterior | Painted |
| Manufacturer part number | 31314 |
| Special Features | Crack Resistant, Strong, Waterproof |
| Item Weight | 90 g |
| Viscosity | High |
M**N
Always worked well for engine work.
Never had an issue using this if you follow the directions. Even when I don't leave it for enough time, this has helped me fix a few oil leaks.Only once my car's rear main seal leaked after changing it and using this - but I had to remove it after install because I didn't add enough RTV so the re-install might have caused my leak anyway. Either way, I wish I had followed the time guidance for that one!It will stay liquidy(?) for a few minutes at least - no need to panic if you have to apply then install something awkward. I would try again with new stuff after 20 mins if it's important and you haven't managed to seal your job together.Seems to set enough to use after an hour or two but it will not be at full strength.It's very easy to apply once, then you'll have to sort out how you're going to store it without it hardening in the nozzle.SO messy! I don't care, I don't want to remove an oil pan for a second time so I use this.
P**Y
Great product
Used on my motorcycle restoration projects with excellent results.
E**G
Good sealer, takes long to dry.
Used this sealer on my sump pan after replacement. Would reccomend letting dry overnight prior to filling with oil as takes longer to set than some sealers I have previously used. Been used on my car for 1 year and no leaks.
J**M
Reliable
Always reliable, good value. Have been using for years.
M**E
Excellent gasket material
excellent quality sealant - plenty of time to move parts round before it cures. Strong bond when cured
J**O
Great for heated grips
Used this for my heated grips seems to have worked perfectly, just the job
C**N
Effective sealant
Easy to use
R**2
would recommend
used on exhaust and rocker boxgood product and sets well to make a good seal.Will continue to use this product
Trustpilot
1 week ago
2 weeks ago
