3M Marine Grade Silicone Sealant Clear PN08029 304 Milliliters Cartridge
Why you'll like it
- Superior Weather Resistance — Engineered to withstand harsh marine environments without yellowing or degrading under intense UV exposure.
- Lasting Flexibility — Stays permanently flexible over time to accommodate structural movement and vibrations without cracking.
- Mildew Protection — Forms a moisture-curing seal that actively resists mildew growth in damp marine cabins and galleys.
- Broad Material Compatibility — Adheres securely to fiberglass, metal, glass, wood, rubber, and various plastics above the waterline.
Product details
Description
The 3M Marine Grade Silicone Sealant in clear, part number PN08029, is a high-performance moisture-curing adhesive paste engineered specifically to withstand harsh marine environments. Supplied in a convenient 304 milliliters cartridge, this silicone rubber formulation forms a durable, permanent yet removable seal that stays flexible even after years of exposure to sunlight and moisture.
It is expertly designed for above-waterline interior and exterior applications, making it ideal for securing port lights, hatches, deck hardware, windshields, and dashboard components on boats and RVs. This non-yellowing and mildew-resistant sealant bonds seamlessly to a wide variety of substrates including fiberglass, glass, bare and painted metal, non-oily woods, plastics, and abraded rubber.
With a reliable tack-free time of 5 to 20 minutes and a full cure achieved within 24 to 48 hours, it provides professional-grade weather resistance and dependable sealing performance for marine enthusiasts and maintenance professionals alike.
How to use
- Ensure surfaces are clean, dry, and free of oil, grease, or dirt before application.
- Cut the cartridge tip to the desired bead size, load into a standard caulking gun, and apply the sealant evenly to the joint.
- Tool the sealant within 5 to 10 minutes before a skin forms.
- Allow 24 to 48 hours for a complete cure depending on ambient humidity and temperature.
Ingredients
Polydimethylsiloxane, Silica amorphous, Methyltrimethoxysilane, Acetic acid.
As printed by the brand. Check the pack label if you have an allergy.
Specifications
| Brand | 3M |
|---|---|
| UPC | 051135080290 |
| Ships from | USA (sourced directly), checked in Navi Mumbai |
| Sold by | Dropy.in |
Ratings & reviews
From our customers
5.04 reviews
Used this product?Your review helps other shoppers choose.
Top reviews first: highest rated, with photos first
- Sameer J.5 ★
was doubtful but works great
Honestly was quite skeptical whether a clear paste would hold up against harsh sunlight on exterior hatch joints, but after a few weeks exposed to daily heat it's still transparent and completely intact. Super happy with the weather resistance! ??
- Aasha K.5 ★
baba sathi anvla
Baba la old fishing boat repair karaychi savay aahe, tyanchya sathi he sealant ani hatiche kam sope zale. Glass ani fiberglass var ekdum chhan pakad ghetali yane.
- Vikram M.5 ★
son used it for his project
Got this for my son who needed a reliable adhesive for his model boat restoration project. He applied it around the cabin windows and it sets cleanly without running down the vertical surfaces.
- Rohan D.5 ★
box was crushed
Delivery box was a bit crushed when it reached me, thankfully the 304 milliliters cartridge itself was safe inside. Used it for sealing some deck hardware and window gaps on the boat, works nicely and stays flexible.
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FAQs
What is the cure time for 3M Marine Grade Silicone Sealant?
The sealant becomes tack-free within 5 to 20 minutes of application and achieves a full cure within 24 to 48 hours, depending on environmental temperature and humidity levels.
Can this silicone sealant be used underwater?
No, this product is strictly formulated for interior and exterior marine applications above the waterline and should not be used for continuous underwater submersion.
What surfaces does this silicone sealant adhere to?
It provides excellent adhesion to fiberglass, bare and painted metal, glass, non-oily woods, various plastics, and abraded rubber surfaces.
Is this 3M silicone sealant authentic and imported from the USA?
Yes, this is an authentic USA-imported product. Dropy sources all items directly from the United States to ensure genuine quality and performance.
Does the clear sealant turn yellow over time?
No, the formula is specifically engineered to be non-yellowing, maintaining its clear appearance and structural integrity even after prolonged exposure to weather.
How long will delivery take?
Most orders arrive in 15–20 days: we source each product directly from the USA, check it at our Navi Mumbai warehouse and pack it on video. Items marked Dropy Express ship from our India warehouse and arrive in 3–5 days.
Is cash on delivery available?
Full cash on delivery is available all over India on Dropy Express items. For other orders from ₹2,499 to ₹15,000 you can use Partial COD: pay 25% online now and the rest in cash on delivery.
Are your products genuine?
Yes. Every product is 100% authentic, sourced directly from the USA, quality-checked and packed on video at our Navi Mumbai warehouse.
What if my order arrives damaged or wrong?
Write to us at [email protected] as soon as it arrives. Damaged, wrong or not as described, our Buyer Protection gives you a full refund. The details are in our Return, Refund & Cancellation Policy.
Is delivery free?
Delivery is free on orders from ₹1,499. Below that a ₹79 delivery fee applies.