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Protect Your RV & Boat from Water Damage
3M Marine Grade Silicone Sealant provides a robust, waterproof seal specifically designed for above-the-waterline applications on RVs, boats, and personal watercraft. This white, 10.3 fl oz (298ml) cartridge sealant forms a strong, flexible, non-shrinking elastomeric bond that resists mildew and high temperatures, ensuring a lasting seal that won't turn yellow over time. It adheres effectively to metal, fiberglass, glass, non-oily wood, plastics, and abraded rubber, making it a versatile solution for various marine and RV needs.
Engineered for performance in demanding environments, this sealant stays tough yet flexible, resisting degradation from weather and UV exposure. Its non-sag properties allow for easy application on vertical surfaces without dripping. The formula cures quickly, becoming tack-free in as little as 20 minutes and fully curing in 24 to 48 hours, allowing for prompt return to use. This USA-sourced sealant is ideal for sealing hatches, dashboard components, deck hardware, and portlights, maintaining the aesthetic integrity of your watercraft.
For Indian customers, this USA-imported 3M sealant offers superior durability compared to many local alternatives, especially in humid coastal climates and during monsoon seasons. All customs duties and GST are included in the price, with delivery via ExpressBox tracked shipping within 12-14 days. The 298ml cartridge ensures ample product for multiple sealing tasks.
Engineered for Harsh Marine Environments
This 3M Marine Grade Silicone Sealant is specifically formulated to withstand the rigors of marine use, including above-waterline applications. Its non-shrinking, non-sagging, and flexible elastomeric bond ensures long-lasting performance even under extreme temperature fluctuations and constant vibration. Unlike generic sealants, it resists mildew growth and maintains its white color without yellowing over time, preserving the aesthetic appeal of your RV or boat. The USA-sourced formulation guarantees a high-quality seal that protects against water ingress and environmental damage, offering peace of mind for critical sealing tasks.
Ideal for Indian Climates vs. Local Options
This sealant is an excellent choice for Indian buyers dealing with intense heat, humidity, and monsoon rains. Its superior UV and weather resistance outperform many local alternatives that may degrade faster in tropical climates. While local sealants might offer lower initial costs, they often lack the long-term flexibility and mildew resistance needed for marine and RV applications in India. This 3M product is best for users prioritizing durability and a non-yellowing finish on fiberglass, metal, and painted surfaces. Those needing a sealant for extreme underwater pressure or flexible expansion joints might consider specialized marine epoxies or polyurethane sealants instead.
Typical situations where 3M Marine Grade Silicone Sealant White 298ml (10.3 fl oz) Cartridge | Non-Sag helps — illustrative scenarios, not customer reviews.
Sealing a leaky hatch on an RV parked near the coast in Mumbai during monsoon season.
The 3M Marine Grade Silicone Sealant's non-sag, waterproof, and mildew-resistant properties ensure a durable seal against heavy rains and humidity. Its strong adhesion to fiberglass and metal prevents water ingress, maintaining the RV's interior.
Repairing a cracked portlight frame on a boat in Goa, needing a sealant that won't degrade in high heat and UV.
This sealant's high-temperature and UV resistance, combined with its non-yellowing finish, provides a long-lasting, aesthetically pleasing seal. It adheres well to fiberglass and painted surfaces, protecting the boat from saltwater and sun damage.
| Base Material | Silicone |
| Mildew Resistance | Yes |
| UV Resistance | High |
| Temperature Resistance | High |
| Yellowing | Non-yellowing |
| Sagging | Non-sag |
| Application Surface | Metal, Fiberglass, Glass, Non-oily Wood, Plastics, Abraded Rubber, Paint |
| Application Area | Above-the-waterline, Interior/Exterior |
| Directions | Apply directly from cartridge after surface preparation. No mixing required. |
| Tack-Free Time | 20 minutes |
| Full Cure Time | 24-48 hours |
| Shelf Life (Unopened) | 900 days |
| Shelf Life After Opening | 12 months (category default) |
| Cost per ml | ₹53.83 per ml |
| Contraindications | Not for use below the waterline or on oily surfaces. Not for consumer sale or use (industrial/occupational). |
| Allergens / Common Irritants | May contain chemicals classified as toxic; handle with care and ensure good ventilation. |
| Feature | 3M Marine Grade | Others |
|---|---|---|
| Formulation Type | Silicone-based, non-sag, non-yellowing, mildew-resistant | Varies; may include silicone, acrylic, or polyurethane. Local options may sag or yellow over time. |
| Application Area | Above-waterline RVs, boats, personal watercraft; hatches, hardware, trim | General purpose sealing; suitability for marine/RV above-waterline use varies by brand. |
| Durability & Weather Resistance | High-temperature resistant, UV resistant, flexible, resists cracking | Local products may offer less resistance to extreme heat, UV, and constant vibration. |
| Cost per ml | ₹53.83 per ml | ₹100-₹300 per 50-100ml tube (varies by brand and quality) |
| Mildew & Yellowing Resistance | Excellent resistance, maintains appearance | Many local sealants are prone to mildew growth and yellowing, especially in humid Indian conditions. |
| SKU | btm6506 |
| GTIN | 00051135080276 |
| Brand | 3M |
| Model Name | 08027 Marine Grade Silicon Sealant |
| Color | White |
| Material | Silicone |
| Item Form | Liquid |
| Volume | 298 ml (10.3 fl oz) |
| Weight | 358 g (0.83 lb) |
| Dimensions (Cartridge) | 4.4 cm x 28.4 cm x 4.4 cm (1.73 in x 11.18 in x 1.73 in) |
| Country of Origin | Not stated by manufacturer — US retail version, sourced from authorized US retailers and authorized brand partners |
About 3M
3M is a global leader in adhesives and sealants, renowned for innovative solutions that bond, seal, and protect in demanding industrial and consumer applications.
Compliance & Legal
No product-specific compliance warnings identified. Standard imported-goods terms apply: customs duties & GST paid; for personal use in India; follow the manufacturer's usage instructions on the packaging.
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This item:
3M Marine Grade Silicone Sealant White 298ml (10.3 fl oz) Cartridge | Non-Sag, Waterproof, Mildew-Resistant
16,041
This item
3M Marine Grade Silicone Sealant White 298ml (10.3 fl oz) Cartridge | Non-Sag, Waterproof, Mildew-Resistant
16,041
Total price:
23,291
You save 4,021 (15%) Extra3 items selected
3 items
23,291You save 4,021 (15%) Extra
| Attributes | Current |  |  |  |  |  |  |
|---|---|---|---|---|---|---|---|
| Spec | |||||||
| Price | 16,041 17,401 | 3,015 3,696 | 4,235 6,215 | 6,305 8,038 | 6,444 9,432 | 3,680 4,109 | 5,449 6,568 |
| Rating | 4.60(211) | 4.40(37) | 4.88(8) | 4.50(340) | 4.50(11K+) | 4.70(28K+) | 5.00(12) |
| Brand Name | 3M | Loctite | 3M | Eagle Abrasives | Rubbermaid | ACCUSHARP | Sorority Shop |
| Item Form | Liquid | N/A | N/A | N/A | N/A | N/A | N/A |
| Source | US Retail | US Retail | US Retail | US Retail | US Retail | US Retail | US Retail |
| Sold By | CrowCrowCrow | CrowCrowCrow | CrowCrowCrow | CrowCrowCrow | CrowCrowCrow | CrowCrowCrow | CrowCrowCrow |
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