10 Best automotive silicone sealants of 2025

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Best Choice

1

FORTIVO

Professional Automotive Seam Sealer, Paintable Quick-Set Polyurethane Auto Body Seam Sealer for Metal Surfaces of Cars, Trucks, Etc, Includes Gloves & Tip - White RV Roof Sealant
9.8

Exceptional

Our Rating
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Value for Money

2

XFasten
XFasten Silicone Sealant Waterproof Black Cartridge, 10.1 oz (Single Pack) Black Caulking Silicone Adhesive Sealant Cartridge for RV, General Use, Window, Door, Glass, Automotive Leak Sealing
Main highlights

Key Features
Weatherproof, UV and heat resistant, quick-setting, and offers 15-year protection. Ideal for both indoor and outdoor use on various surfaces.

Ideal Use Cases
Perfect for sealing leaks and drips on metal, granite, stone, wood, and glass in extreme conditions like heavy rain or intense sunlight.

Customer Praise
Most reviews highlight its durability, ease of application with the high-pressure resistant cartridge, and effectiveness in preventing leaks and cracks.
9.7

Exceptional

Our Rating

8.0
Simple to use

8.0
worth the money
3

Permatex
Permatex 80050 Clear RTV Silicone Adhesive Sealant, 3 oz

16% Off
Main highlights

Versatile Adhesive Sealant
Permatex 80050 is a clear RTV silicone sealant that seals, bonds, repairs, and secures various materials including glass, metal, and plastics.

Ideal for Outdoor Use
This sealant is waterproof and flexible, perfect for exterior applications and areas exposed to weather and vibration.

Highly Praised for Versatility
Customers appreciate its effectiveness in securing items like weatherstripping and preventing leaks in household repairs.
9.6

Exceptional

Our Rating

9.5
Attachment

9.5
Water tight

9.3
Heat tolerance
4

Permatex
Permatex 81158 Black Silicone Adhesive Sealant, 3 oz. Tube, Pack of 1
Main highlights

Versatile_Adhesive_Sealant
Permatex 81158 Black Silicone offers superior adhesion and flexibility for diverse materials.

Ideal_for_Outdoor_and_Indoor_Use
Perfect for sealing, bonding, and repairing glass, metal, plastics, and more.

Strong_Adhesion_Praised_by_Customers
Customers appreciate its excellent adhesion, especially on rough surfaces.
9.5

Excellent

Our Rating

8.9
Attachment

8.0
Simple to use

8.0
Simple to take off
5

Permatex
Permatex 82180 Ultra Black Maximum Oil Resistance RTV Silicone Gasket Maker, Sensor Safe And Non-Corrosive, For High Flex And Oil Resistant Applications 3 oz
Main highlights

Superior Adhesion and Durability
Non-corrosive formula provides superior adhesion and long-term durability.

Ideal for Automotive Applications
Perfect for valve covers, oil pans, and transmission pans.

Highly Praised Oil Resistance
Customers praise its unmatched oil resistance and reliable sealing.
9.4

Excellent

Our Rating
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6

J-B Weld
J-B Weld 31310 All-Purpose RTV Silicone Sealant and Adhesive - 3 oz. - Clear
Main highlights

Key Features and Benefits
High-strength, RTV silicone sealant; cures at room temperature, waterproof, flexible, and resistant to extreme temperatures and aging.

Ideal Use Cases
Perfect for sealing gaps in kitchens, bathrooms, autos, and electronics; excels in bonding, waterproofing, and insulating applications.

Customer Reviews Highlight
Most praised for its durability and versatility across various surfaces, with users appreciating its ease of application and long-lasting seal.
9.2

Excellent

Our Rating

9.3
Heat tolerance

9.1
Attachment

8.9
Simple to use
7

Permatex
Permatex 82194 Ultra Grey Rigid High-Torque RTV Silicone Gasket Maker, Sensor Safe And Non-Corrosive, For High Torque And Vibration Resistant Applications, 3 oz
Main highlights

High Performance Formula
Sensor-safe, non-corrosive silicone provides reliable gaskets for mechanical assemblies.

Ideal for High Torque Applications
Perfect for valve covers, water pump housings, and intake manifolds.

Praised for Durability
Long-lasting, resists aging and thermal cycling without hardening or cracking.
8.9

Very Good

Our Rating

9.9
Temperature control

9.7
lasts a long time

9.3
worth the money
8

DAP

Dap 00694 2.8-Ounce Silicone Rubber Auto/Marine Sealant, Clear

17% Off
8.8

Very Good

Our Rating
9

J-B Weld
J-B Weld 31319 Black RTV Silicone Sealant and Adhesive - 3 oz.
Main highlights

Durability and Versatility
The J-B Weld 31319 Black RTV Silicone Sealant and Adhesive offers exceptional durability and versatility, forming a strong, waterproof bond on various surfaces.

Ideal for High-Temperature and DIY Projects
Perfect for sealing gaps in heat-prone areas like ovens and engines, and for DIY repairs around the house including plumbing, automotive, and household appliances.

Ease of Use and Precise Application
Customers consistently praise the product's ease of use, with its smooth application, precise nozzle, and easy cleanup being standout features.
8.7

Very Good

Our Rating

9.9
Flexibility

9.7
Simple to use

9.5
lasts a long time
10

Permatex

Permatex 81160 High-Temp Red RTV Silicone Gasket, 3 oz
8.6

Very Good

Our Rating

10 Best automotive silicone sealants of 2025

1

Professional Automotive Seam Sealer, Paintable Quick-Set Polyurethane Auto Body Seam Sealer for Metal Surfaces of Cars, Trucks, Etc, Includes Gloves & Tip - White RV Roof Sealant

How do we rank?

How do we rank?

Analyzing top stores

2

XFasten Silicone Sealant Waterproof Black Cartridge, 10.1 oz (Single Pack) Black Caulking Silicone Adhesive Sealant Cartridge for RV, General Use, Window, Door, Glass, Automotive Leak Sealing

8.0

8.0

3

Permatex 80050 Clear RTV Silicone Adhesive Sealant, 3 oz

9.5

9.5

9.3

4

Permatex 81158 Black Silicone Adhesive Sealant, 3 oz. Tube, Pack of 1

8.9

8.0

8.0

5

Permatex 82180 Ultra Black Maximum Oil Resistance RTV Silicone Gasket Maker, Sensor Safe And Non-Corrosive, For High Flex And Oil Resistant Applications 3 oz

6

J-B Weld 31310 All-Purpose RTV Silicone Sealant and Adhesive - 3 oz. - Clear

9.3

9.1

8.9

7

Permatex 82194 Ultra Grey Rigid High-Torque RTV Silicone Gasket Maker, Sensor Safe And Non-Corrosive, For High Torque And Vibration Resistant Applications, 3 oz

9.9

9.7

9.3

8

Dap 00694 2.8-Ounce Silicone Rubber Auto/Marine Sealant, Clear

9

J-B Weld 31319 Black RTV Silicone Sealant and Adhesive - 3 oz.

9.9

9.7

9.5

10

Permatex 81160 High-Temp Red RTV Silicone Gasket, 3 oz

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