Skip to main content
HalloweenPetLawn & GardenTruck & AutomotiveSporting GoodsHorseFarm & RanchClothingLivestockPet & Animal PharmacyToolsPoultryFencing & GatesHome ImprovementOutdoor LivingHeating & CoolingHome Decor & FurnitureOutdoor Power EquipmentTrailers & TowingBoots & ShoesWild Birds & WildlifeToysGift CardsServices Propane RefillTrailer RentalGarden CenterFeed CenterSame Day DeliveryPetVet ClinicPet WashGrooming at PetsenseDog Training at PetsenseTractor Supply RxPet InsuranceWag!

"Savings and Offers"

Weekly AdSaleClearance

"More Options"

Weekly AdWhat's NewTractor Supply AppEarn Rewards with Neighbor's ClubHometown HeroesLife Out Here BlogTSC Exclusive BrandsTop BrandsClearance ItemsBattery FinderOutdoor Power Equipment Parts FinderHitch Finder

Spend $49.99 to unlock Free Delivery on most orders

|
Learn More
Order statusTSC Credit CardsWhat’s newPetsenseWeekly Ad
​
Sign In / EnrollGet rewarded!
​
Halloween
Pet
Lawn & Garden
Truck & Automotive
Sporting Goods
Horse
Farm & Ranch
Clothing
Livestock
Pet & Animal Pharmacy
Tools
Poultry
Fencing & Gates
Home Improvement
Outdoor Living
Heating & Cooling
Menu

Search

Home

Sign In

Cart
5.0
(1)
5.0 out of 5 stars. 1 review
A woman outside with a dog
A woman outside with a dog
  1. Home
  2. /
  3. Home Improvement
  4. /
  5. Painting
  6. /
  7. Adhesives & Sealants
  8. /
  9. Silicone
  10. /

  11. Devcon Versachem Mega Black Silicone Gasket Maker

  1. Home
  2. /
  4. /
  5. Silicone

Devcon Versachem Mega Black Silicone Gasket Maker

Shop all Devcon
Devcon Versachem Mega Black Silicone Gasket Maker

Item # 163791899

Devcon Devcon Versachem Mega Black Silicone Gasket Maker
Devcon Devcon Versachem Mega Black Silicone Gasket Maker

Spend $49.99 to unlock free delivery!

Neighbor's Club logo
Neighbor’s Club Members earn points with purchases.

Sign in or Join Now

Shop all Devcon
Devcon Versachem Mega Black Silicone Gasket Maker

Item # 163791899

Devcon Devcon Versachem Mega Black Silicone Gasket Maker
Devcon Devcon Versachem Mega Black Silicone Gasket Maker

Subscription options

$569

$599

Save$030(5%)

Save 5% today and on all future orders

Pickup or delivery when it works for you, plus free delivery on orders over $49.99.

Skip, modify, or cancel anytime.

$5.99

Spend $49.99 to unlock free delivery!

This item is available online only

Delivery to

Free standard delivery on online footwear & Clothing purchases of $49 and over.

​
Neighbor's Club logo
Neighbor’s Club Members earn points with purchases.

Sign in or Join Now

The Devcon Versachem Mega Black Silicone Gasket Maker is a high performance and moisture-curing gasketing material that cures into a strong silicone rubber that maintains long-term durability and flexibility to make formed-in-place gaskets. The silicone gasket maker forms a tough and flexible silicone rubber gasket that resists aging and weathering. This gasket maker also will not harden, shrink or crack for durability and long-lasting use.

  • Makes gaskets for valve covers, oil pans, intake manifold end seals, water pumps, transmission pans, cam covers and thermostatic housings
  • Gasket maker is great for use on all engines
  • High performance and moisture-curing gasketing material
  • Cures into a strong silicone rubber to make formed-in-place gaskets
  • Maintains long-term durability and flexibility
  • Will not harden, shrink or crack for durability
  • Forms a tough and flexible silicone rubber gasket that resists aging and weathering
  • Works best on silicone, cork, felt and rubber gaskets
  • Waterproof and low odor formula for optimal use
  • Non-corrosive to steel, iron and aluminum
  • Oxygen sensor safe, low volatile and non-toxic
  • Non-flammable and OEM (Original Equipment Manufacturer) approved
  • Tensile strength of 240 PSI for heavy-duty use
  • Temperature range of -65 degrees F to 400 degrees F continuous; -65 degrees F to 650 degrees F intermittent
BrandDevcon
Country of OriginMade in USA
Cure Time24 hr.
FeaturesMega Grey Silicone is a high performance, moisture curing gasketing material that cures into a strong silicone rubber that maintains long term durability and flexibility to make formed-in-place gaskets. Forms a tough, flexible silicone rubber gasket that
Flash Point200 deg. F
Maximum Temperature400°F
Minimum Temperature-65 deg. F
Package Quantity1
Product Height8 in.
Product Length4 in.
Product Weight0.25 lb.
Product Width4 in.
Volume3 oz.
Manufacturer Part Number99839

Have a question?
Start typing your question and we'll check if it was already asked and answered.
1 - 1 of 1 Question
Sort by
Newest questions

Q: Is Mega Black aquarium safe as it seems to be 100% silicone?

4 years ago
1 Answer
  • A: This product is meant to be used on all engines; make gaskets for valve covers, oil pans, intake manifold end seals, water pumps, transmission pans, cam covers, and thermostat housings. When using this product, some safety precautions are to be followed.
    4 years ago
    Helpful?

Q&As

Have a question?
Start typing your question and we'll check if it was already asked and answered.
1 - 1 of 1 Question
Sort by
Newest questions

Q: Is Mega Black aquarium safe as it seems to be 100% silicone?

4 years ago
1 Answer
  • A: This product is meant to be used on all engines; make gaskets for valve covers, oil pans, intake manifold end seals, water pumps, transmission pans, cam covers, and thermostat housings. When using this product, some safety precautions are to be followed.
    4 years ago
    Helpful?

Similar Items

  1. Devcon Mega Grey Silicone Gasket Maker
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Devcon Mega Grey Silicone Gasket Maker

    $6.99
  2. Devcon VersaChem Automotive Heavy-Duty Silicone
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Devcon VersaChem Automotive Heavy-Duty Silicone

    $15.29
    Was $16.99Save $1.70
  3. Dap 100% Silicone Sealant
    3.7 out of 5 stars with 3 reviews
    3.7 (3)

    Dap 100% Silicone Sealant

    $9.99
  4. Permatex 11 oz. RTV Silicone Adhesive Sealant Spray, Clear
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Permatex 11 oz. RTV Silicone Adhesive Sealant Spray, Clear

    $17.99
    Was $19.99Save $2.00
  5. Dap 9.8 oz. Window and Door Silicone Sealant
    4.0 out of 5 stars with 6 reviews
    4.0 (6)

    Dap 9.8 oz. Window and Door Silicone Sealant

    $12.99
  6. Top Rated
    J-B Weld 3 oz. Clear Silicone Sealant
    5.0 out of 5 stars with 1 reviews
    5.0 (1)

    J-B Weld 3 oz. Clear Silicone Sealant

    $5.99
  7. Top Rated
    Devcon 10.3 oz. VersaChem Type 650 Red High Temperature Silicone, -100 to 650 Deg F Temp Resistance, 5,000 PSI Pressure
    5.0 out of 5 stars with 1 reviews
    5.0 (1)

    Devcon 10.3 oz. VersaChem Type 650 Red High Temperature Silicone, -100 to 650 Deg F Temp Resistance, 5,000 PSI Pressure

    $26.99
  8. Top Rated
    Devcon VersaChem Type 7 Super Clear Silicone Gasket Maker
    5.0 out of 5 stars with 1 reviews
    5.0 (1)

    Devcon VersaChem Type 7 Super Clear Silicone Gasket Maker

    $6.99
  9. Top Rated
    Permatex RTV Silicone Gasket Maker Super Glue
    5.0 out of 5 stars with 1 reviews
    5.0 (1)

    Permatex RTV Silicone Gasket Maker Super Glue

    $2.82
  10. Permatex 50 mL Gasket Maker
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Permatex 50 mL Gasket Maker

    $17.99
  11. Permatex Gear Oil Gasket Maker 3 oz.
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Permatex Gear Oil Gasket Maker 3 oz.

    $12.99
  12. Permatex The Right Stuff Black 90 Minute Gasket Maker 3 oz.
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Permatex The Right Stuff Black 90 Minute Gasket Maker 3 oz.

    $9.99

Items You May Like

  1. Permatex 3 oz. RTV Silicone Adhesive Spray, Black, -75 - 450 Deg F (-59 - 232 Deg C) Temperature Range
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Permatex 3 oz. RTV Silicone Adhesive Spray, Black, -75 - 450 Deg F (-59 - 232 Deg C) Temperature Range

    $5.13
  2. Top Rated
    Devcon 3 oz. Black VersaChem Silicone, 300 PSI Tensile Strength, 500 PSI Intermittent Tensile Strength
    5.0 out of 5 stars with 1 reviews
    5.0 (1)

    Devcon 3 oz. Black VersaChem Silicone, 300 PSI Tensile Strength, 500 PSI Intermittent Tensile Strength

    $4.54
  3. Flex Seal Flex Paste 1 lb. Black All Purpose Strong Flexible Watertight Multi-Purpose Sealant, 4 pack
    4.3 out of 5 stars with 736 reviews
    4.3 (736)

    Flex Seal Flex Paste 1 lb. Black All Purpose Strong Flexible Watertight Multi-Purpose Sealant, 4 pack

    $59.99
  4. Liquid Nails 10.3 oz. Roof Repair Sealant
    4.6 out of 5 stars with 5 reviews
    4.6 (5)

    Liquid Nails 10.3 oz. Roof Repair Sealant

    $6.99
  5. Devcon 36 mL VersaChem High Red Threadlock Adhesive
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Devcon 36 mL VersaChem High Red Threadlock Adhesive

    $20.69
    Was $39.99Save $19.30
  6. Permatex 10 mL Surface Insensitive Thread Lock
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Permatex 10 mL Surface Insensitive Thread Lock

    $13.49
    Was $14.99Save $1.50
  7. Top Rated
    Flex Seal 8 oz. Flex Shot Clear Thick Rubber Adhesive Caulking Sealant, 4-Pack
    4.8 out of 5 stars with 80 reviews
    4.8 (80)

    Flex Seal 8 oz. Flex Shot Clear Thick Rubber Adhesive Caulking Sealant, 4-Pack

    $67.99
  8. Devcon 25 mL VersaChem 5-Minute Heavy-Duty Epoxy
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Devcon 25 mL VersaChem 5-Minute Heavy-Duty Epoxy

    $3.40
  9. Flex Seal 9 oz. Flex Paste Black All Purpose Strong Flexible Watertight Multi-Purpose Sealant, 4-Pack
    4.3 out of 5 stars with 633 reviews
    4.3 (633)

    Flex Seal 9 oz. Flex Paste Black All Purpose Strong Flexible Watertight Multi-Purpose Sealant, 4-Pack

    $59.99
  10. Top Rated
    Devcon 2 oz. VersaChem 4-Minute Steel Epoxy
    5.0 out of 5 stars with 1 reviews
    5.0 (1)

    Devcon 2 oz. VersaChem 4-Minute Steel Epoxy

    $4.46
  11. Majic 11 oz. Diamondhard RePurpose Interior/Exterior Satin Spray Paint
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Majic 11 oz. Diamondhard RePurpose Interior/Exterior Satin Spray Paint

    $9.49
    Choose Options
  12. Top Rated
    Devcon 1 oz. Weldit Cement
    5.0 out of 5 stars with 1 reviews
    5.0 (1)

    Devcon 1 oz. Weldit Cement

    $2.77

Customers Also Bought

  1. Devcon 8 oz. VersaChem Black Low Volatile Silicone Aerosol, 400 PSI Tensile Strength, -100 - 600 Deg F Temp Range
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Devcon 8 oz. VersaChem Black Low Volatile Silicone Aerosol, 400 PSI Tensile Strength, -100 - 600 Deg F Temp Range

    $17.09
    Was $18.99Save $1.90
  2. Permatex 1.5 oz. Form-A-Gasket No. 1 Sealant
    4.5 out of 5 stars with 2 reviews
    4.5 (2)

    Permatex 1.5 oz. Form-A-Gasket No. 1 Sealant

    $5.99
  3. Devcon VersaChem Type 2 Gasket Sealant, 5,100 PSI Tensile Strength, -65 - 425 Degree Fahrenheit Temperature Range
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Devcon VersaChem Type 2 Gasket Sealant, 5,100 PSI Tensile Strength, -65 - 425 Degree Fahrenheit Temperature Range
  4. Top Rated
    Permatex 12 oz. High-Tack Gasket Sealant, 9 oz. Net Weight, -65 - 500 Deg F (-54 - 260 Deg C) Temp Range
    5.0 out of 5 stars with 1 reviews
    5.0 (1)

    Permatex 12 oz. High-Tack Gasket Sealant, 9 oz. Net Weight, -65 - 500 Deg F (-54 - 260 Deg C) Temp Range

    $13.49
    Was $14.99Save $1.50
  5. Top Rated
    Devcon VersaChem Plastic Welder, -40 deg. to 200 deg. F Temperature Range
    5.0 out of 5 stars with 1 reviews
    5.0 (1)

    Devcon VersaChem Plastic Welder, -40 deg. to 200 deg. F Temperature Range

    $4.99
  6. Top Rated
    Devcon VersaChem Fast-Drying 5 Minute Epoxy, 1500 PSI Tensile Strength, -40 to 200 Degrees Fahrenheit Temperature Range
    5.0 out of 5 stars with 2 reviews
    5.0 (2)

    Devcon VersaChem Fast-Drying 5 Minute Epoxy, 1500 PSI Tensile Strength, -40 to 200 Degrees Fahrenheit Temperature Range

    $13.49
    Was $14.99Save $1.50
  7. Devcon 1.28 oz. Duco Stik-Tak Reusable Adhesive
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Devcon 1.28 oz. Duco Stik-Tak Reusable Adhesive

    $4.99
  8. Top Rated
    Devcon 25 mL VersaChem Titanium 5 Heavy-Duty Epoxy
    5.0 out of 5 stars with 1 reviews
    5.0 (1)

    Devcon 25 mL VersaChem Titanium 5 Heavy-Duty Epoxy
  9. Top Rated
    Devcon Duco Plastic and Model Cement
    5.0 out of 5 stars with 1 reviews
    5.0 (1)

    Devcon Duco Plastic and Model Cement
  10. Permatex 3 oz. Clear Silicone Adhesive, RTV Indoor/ Outdoor Sealant
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Permatex 3 oz. Clear Silicone Adhesive, RTV Indoor/ Outdoor Sealant

    $5.37
  11. Top Rated
    Devcon 5 Minute Heavy-Duty Epoxy Gel
    5.0 out of 5 stars with 2 reviews
    5.0 (2)

    Devcon 5 Minute Heavy-Duty Epoxy Gel

    $4.99
  12. Top Rated
    Devcon 1 oz. Fast-Drying 5-Minute Epoxy
    5.0 out of 5 stars with 3 reviews
    5.0 (3)

    Devcon 1 oz. Fast-Drying 5-Minute Epoxy

Reviews

Rating Snapshot

Select a row below to filter reviews.

5 starsstars

1
1 review with 5 stars.

4 starsstars

0
0 reviews with 4 stars.

3 starsstars

0
0 reviews with 3 stars.

2 starsstars

0
0 reviews with 2 stars.

1 starstars

0
0 reviews with 1 star.

Overall Rating

5.0

Review this Product

Select to rate the item with 1 star. This action will open submission form.
Select to rate the item with 2 stars. This action will open submission form.
Select to rate the item with 3 stars. This action will open submission form.
Select to rate the item with 4 stars. This action will open submission form.
Select to rate the item with 5 stars. This action will open submission form.
Adding a review will require a valid email for verification
1 to 0 of 1 Review .

1 Ratings-Only Review

Get the top deals, latest trends and more
Sign up for emails from Tractor Supply today.
First Name*
Last Name*
Email*

Customer Support

  • Order Status

  • Return Policy

  • Delivery Options

  • Tax Exemptions

  • Frequently Asked Questions

  • Contact Us

  • Recall Notices

  • Call:  

    (877) 718-6750

  • Mon - Sat: 7am - 9pm CT

  • Sun: 8am - 7pm CT

  • Closed Christmas Day

About Us

  • Who We Are

  • Investor Relations

  • Stewardship

  • Community

  • Military Support

  • Product Catalog

  • Tractor Supply Stores

  • .Pharmacy Verified Website

Work With Us

  • Careers

  • Sponsorship

  • Affiliate Program

  • Potential Vendor Partners

  • Vendor Information

  • Tractor Supply Media Network

Neighbor's Club

  • About

  • Rewards

  • Hometown Heroes

  • Frequently Asked Questions

  • Terms & Conditions

Credit Center

  • TSC Credit Card

  • Klarna

Stay Connected

Connect & Share with the Tractor Supply Community.

Tractor Supply App

Shop on the go with the Tractor Supply App

Learn More

Stay Connected

Connect & Share with the Tractor Supply Community.

Tractor Supply App

Shop on the go with the Tractor Supply App

Learn More
  • Order Status

  • Return Policy

  • Delivery Options

  • Tax Exemptions

  • Frequently Asked Questions

  • Contact Us

  • Recall Notices

  • Call:  (877) 718-6750

  • Mon - Sat: 7am - 9pm CT

  • Sun: 8am - 7pm CT

  • Closed Christmas Day

  • Who We Are

  • Investor Relations

  • Stewardship

  • Community

  • Military Support

  • Product Catalog

  • Tractor Supply Stores

  • .Pharmacy Verified Website

  • Careers

  • Sponsorship

  • Affiliate Program

  • Potential Vendor Partners

  • Vendor Information

  • Tractor Supply Media Network

  • About

  • Rewards

  • Hometown Heroes

  • Frequently Asked Questions

  • Terms & Conditions

  • TSC Credit Card

  • Klarna

Connect & Share with the Tractor Supply Community.

Shop on the go with the Tractor Supply App

Learn More
  • Privacy policy
  • Your Privacy Choices
  • Terms and Conditions
  • California Transparency Act
  • Legal Notices
  • Accessibility
  • Responsible Disclosure Statement
  • Surprise (Balance) Medical Billing Disclosure
  • Transparency in Coverage
  • Human Rights Policy
  • Vendor Code of Conduct
  • California Notice of Collection
  • Privacy Requests

© 2026, Tractor Supply Co. All Rights Reserved.