J-B Weld 31316 Blue RTV Silicone Gasket Maker and Sealant, 3. Fluid_Ounces
J-B Weld 31316 Blue RTV Silicone Gasket Maker and Sealant, 3. Fluid_Ounces
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J-B Weld 31316 Blue RTV Silicone Gasket Maker and Sealant, 3. Fluid_Ounces

4.4 stars out of 217 reviews
(4.4)|
217 ratings
J-B Weld 31316 Blue RTV Silicone Gasket Maker and Sealant, 3. Fluid_OuncesJ B Weld 31316 Blue RTV Silicone Gasket Maker and Sealant 3 Fluid Ounces3 pack J B Weld MarineWeld Adhesive Syringe 25 mlJ B Weld 31314 High Temp RTV Silicone Gasket Maker and Sealant Red 3 ozJ B Weld 32327 RTV Silicone Grey Gasket Maker Industrial Sealant 3 ozJ B Weld MarineWeld Adhesive Syringe 25 ml

Key item features

  • RTV Silicone: This general-purpose RTV (Room Temperature Vulcanized) silicone is formulated for sealing and bonding uneven surfaces.
  • Durable Seal: Upon curing, the silicone creates a tough, waterproof seal on most surfaces, resisting shrinking, cracking, and weathering.
  • Versatile Applications: Ideal for a wide range of uses including bonding, sealing, weather stripping, moldings, interior trim, windows, windshields, door frames, and lens housings.
  • Professional Grade: Trusted by mechanics and repair professionals for strong bonds in demanding environments.
  • DIY Friendly: Suitable for both automotive accessories and household applications, enabling effective do-it-yourself repairs and restorations.
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Customer ratings & reviews

4.4 out of 5 stars
stars217 ratings151 reviews
How item rating is calculated
  1. 5 stars74% (161)
  2. 4 stars13% (28)
  3. 3 stars3% (6)
  4. 2 stars2% (4)
  5. 1 star8% (18)

Reviews summary

Pros
  • : Lasts extremely well in various applications.
  • : Simple 1:1 ratio in a syringe design.
  • : Forms a strong connection resistant to water and rough pressures.
  • : Provides reliable grip during intense activities.
  • : Offers good value at this cost.
Neutral
  • : Can be fast, but may not fully harden.
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Showing 1-3 of 151 reviews

Jan 7, 2026
Cojmpr
Item details
Size: 0.85 oz
Color: White
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

This is staying stocked in the farm permanently!

AMAZING product!! I used it to seal up a broken carpet steam cleaner water tank, and a livestock water trough that was cracked and leaking. The steam cleaner had a legit hole in it and it plugged it up and fixed it and the tough has been cracked for 3 years with nothing working until NOW! I'll be keeping it in stock on the farm and in my shop from now on!

Helpful?7HWHFRI2LGYT653989625
Sep 3, 2025
anonymous
Item details
Size: 0.85 oz
Color: White
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

Worked great for a quick fix

Had someone drop something and smash a U.S. quarter sized chunk off the interior corner of our shower pan, and used this to fix the hole. While somewhat difficult to smooth out for someone who is less than artistic, the product itself sealed up very well with no cracking or voids.

Helpful?7HWHFRI2LGYT653989625
Dec 3, 2024
Joel
Item details
Size: 0.85 oz
5 out of 5 stars review

Verified Purchase

I found the item I needed online and noticed it was available for curbside pickup. The whole transaction went very smooth and the employee who brought it out to my car was cheerful and courteous.

Helpful?7HWHFRI2LGYT653989625