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

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
Size3 oz.
Actual ColorBlue
Pack SizeSingle

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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Starting from $10.21

About this item

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Customer ratings & reviews

4.4 out of 5 stars
stars
245 ratings151 reviews
How item rating is calculated
  1. 5 stars75% (183)
  2. 4 stars12% (30)
  3. 3 stars3% (8)
  4. 2 stars2% (4)
  5. 1 star8% (20)

Reviews summary

Pros

  • : Lasts extremely well in various applications.
  • : Comes with precision tips for convenient application.
  • : Provides strong adhesion for various surfaces.
  • : Sets in 5 minutes at room temperature.
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Showing 1-3 of 151 reviews

Jul 4, 2026
Colleen
Item details
Size: 0.85 oz
Color: White
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

Good for marine repairs

I recently used JB Weld Marine Epoxy to patch some screw holes in my boat. I am happy with the results. The epoxy is strong and durable, making it perfect for boat repairs. The application was straightforward. I mixed the two parts easily and the screw holes look good. Once cured, the bond was good.

Helpful?7HWHFRI2LGYT653989625
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
Apr 18, 2026
Linda
Top Reviewer
Item details
Size: 3 oz
Color: Red
Multipack quantity: 1
Sold and shipped byJBTools
5 out of 5 stars review

Verified Purchase

we let it dry for 3 days.....going to try the oven tonight.....the tube split when my husband was almost done.....but it was almost empty...so not much went to waste.....

Helpful?7HWHFRI2LGYT653989625