3M Marine Silicone Rubber sealant
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  • 3M Marine Silicone Rubber sealant

3M Marine Grade Silicone Sealant

3M Marine Grade Silicone Sealant is a mildew resistant, non sagging, moisture curing silicone rubber adhesive sealant for above-waterline applications. Designed specifically for durability in the harsh marine environment, it provides non-yellowing seals that remain flexible even after years of exposure.

It adheres to and bonds bare and painted metal, glass, gelcoat, Lexan, Plexiglass, fiberglass, non-oily woods, abraded rubber, vinyl, and many plastics. Cures tack free in one hour, with full cure in 24 hrs. Use soap and water for cleanup.

Note: Silicone sealants are generally not as strong as polyurethanes. While it does have 220 psi tensile strength, evaluate project bonding and flexibility requirements beforehand.

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$10.93 / ea
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Tech Spec Product Info User Generated Content


  • Mildew resistant
  • Flexible Polymer
  • One-part Cure
  • Excellent weathering resistance
  • High temperature resistant
  • Non-shrinking
  • Non-sagging formula


Below Water Line (yes/no): No
Material: Silicone
Rate Of Cure: Fast
Strength: Fair
Type: Sealant
Usage: Sealing
5 1


by PowerReviews
3M Marine Grade Silicone Sealant

(based on 1 review)

Ratings Distribution

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Reviewed by 1 customer

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Yes I would buy 3M silicone again

By Rick

from Bay shore, NY

About Me Casual/ Recreational

Verified Buyer


  • Easy to Use
  • Protects Well
  • Visually Pleasing
  • Weather Proof


    Best Uses

    • Outdoor

    Comments about 3M Marine Grade Silicone Sealant:

    Your web site is easy to use & I received the products in a short time

    • Was this a gift?:
    • No

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