---
product_id: 252681275
title: "SIKA Sikaflex®-291 Marine Boat Sealant - Elastic, Vibration-Resistant Joint Sealant for Wood, Metal, Plastic & Ceramic | NSF Listed, Low Odor, Over-Paintable, Sandable, 3 fl. oz Tube"
brand: "sika"
price: "4553 som"
currency: KGS
in_stock: true
reviews_count: 13
category: "Sika"
url: https://www.desertcart.kg/products/252681275-sika-sikaflex-291-marine-boat-sealant-elastic-vibration-resistant-joint
store_origin: KG
region: Kyrgyzstan
---

# Superior water resistance Marine-grade elasticity Cures in ~60 mins SIKA Sikaflex®-291 Marine Boat Sealant - Elastic, Vibration-Resistant Joint Sealant for Wood, Metal, Plastic & Ceramic | NSF Listed, Low Odor, Over-Paintable, Sandable, 3 fl. oz Tube

**Brand:** sika
**Price:** 4553 som
**Availability:** ✅ In Stock

## Summary

> 🚤 Seal the deal with marine-grade strength and speed!

## Quick Answers

- **What is this?** SIKA Sikaflex®-291 Marine Boat Sealant - Elastic, Vibration-Resistant Joint Sealant for Wood, Metal, Plastic & Ceramic | NSF Listed, Low Odor, Over-Paintable, Sandable, 3 fl. oz Tube by sika
- **How much does it cost?** 4553 som with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kg](https://www.desertcart.kg/products/252681275-sika-sikaflex-291-marine-boat-sealant-elastic-vibration-resistant-joint)

## Best For

- sika enthusiasts

## Why This Product

- Trusted sika brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Fast-Track Fixes:** Starts curing immediately with atmospheric moisture, forming a protective skin in about an hour for quick project turnaround.
- • **Paint & Sand Ready:** Low odor, over-paintable, and sandable finish lets you customize and perfect your boat’s look post-application.
- • **Built for the Waves:** Specifically engineered for marine environments, ensuring unmatched durability against salt and fresh water exposure.
- • **Vibration-Proof Seal:** Elastic and vibration-resistant formula keeps joints intact despite constant boat movement and flexing.
- • **Effortless Application:** Compatible with manual, pneumatic, and electric piston guns for precise, mess-free sealing every time.

## Overview

Sikaflex®-291 is a premium one-component polyurethane marine sealant designed for boats and marine construction. It offers fast curing, exceptional elasticity, and resistance to water, fuels, and oils, making it ideal for vibration-prone joints. Its user-friendly cartridge fits various caulking guns, and its paintable, sandable finish ensures a professional, long-lasting seal.

## Description

Sikaflex®-291 is a high-quality, multipurpose sealant designed specifically for marine applications, making it ideal for use in boats and marine construction. This versatile product provides exceptional elasticity and vibration resistance, ensuring durable, long-lasting seals for joints and seams. Applications: Sikaflex®-291 is perfect for creating vibration-resistant, elastic seals in boats, yachts, and other marine vessels. It is also suitable for a variety of interior sealing applications, making it an essential product for boat maintenance and repair.

Review: Holds well, good gap filler. - Used this to fill the seam between the hull and deck. Used an electric calking gun allowing for controlled flow into the seams which were 22ft runs from stern to bow. took two tubes of Silkaflex. While fresh it was easy to use a scraper to push this material deeper into the seam and simple to remove excess leaving a smooth seam level with the deck. It took several days to harden to my satisfaction and in the meantime collected a layer of dust onto its surface. Once painted there is a subtle but clear discoloration showing through the paint. It's a good product but as this was a restoration job on a classic wooden boat I think epoxy would have been a better choice. But, no complaints with how this material works and I'm sure it will hold up for some time as the hull and deck flex a bit with movement and with the natural swelling and shrinking inherent in wood.
Review: Silkaflex Boat, RV, General use. - This is really good RTV! I didn't know Silksflex existed until I had to change out a pair of jet drives on a Zodiac Hurricane. Silksflex RTV was the recommended by the OEM manufacturer. I use Silkaflex on Motorhomes, trucks and around my house. Very strong and flexible and seawater resistant.

## Features

- THE CHOICE FOR BOATS — Formulated for use in marine construction, this one-component polyurethane adhesive creates a strong, elastic, and vibration-resistant joint seal
- CURES QUICKLY FOR FAST JOBS — Begins to cure immediately upon exposure to atmospheric moisture and develops a skin within approximately 60 minutes, depending on environmental factors such as humidity
- HIGH RESISTANCE TO WATER DAMAGE — Whether fresh or salt water, this Sikaflex marine sealant resists damage and maintains peak performance. It's also resistant for limited periods to fuels and oils
- DURABLE AND NON-CORROSIVE — Sika-291 marine sealant and adhesive won't wear away due to exposure to the elements or to most diluted acids or caustic solutions. Enjoy long-lasting performance
- QUICK AND EASY — Sikaflex-291 comes in a conveniently-sized cartridge that connects to manual, pneumatic, and electric-driven piston guns. Simply point it where you want it to go

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B089SDNLF6 |
| Best Sellers Rank | #7,578 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #6 in Polyurethane Adhesives |
| Brand | SIKA |
| Color | Black |
| Date First Available | June 7, 2020 |
| Department | Unisex-Adult |
| Full Cure Time | 24 Hours |
| Global Trade Identification Number | 00033886130660 |
| Item Form | Paste |
| Item Package Quantity | 1 |
| Item Volume | 3 Fluid Ounces |
| Item Weight | 1.6 ounces |
| Item model number | 610566 |
| Manufacturer | Sika USA |
| Material | Plastic |
| Number of Pieces | 1 |
| Package Dimensions | 8.66 x 5.2 x 1.18 inches |
| Package Information | Tube |
| Special Feature | Adhesion, Durability, Flexibility, Marine Grade, Paintable, Waterproof |
| Specific Uses For Product | Boat building and repair, General Sealing, Industrial and Construction Applications:, Marine applications, Weatherproofing |
| UPC | 033886130660 |
| Unit Count | 3.0 Fluid Ounces |
| Viscosity | Medium viscosity |
| Viscosity Level | Medium |
| Water Resistance Level | Water Resistant |

## Product Details

- **Brand:** SIKA
- **Item Form:** Paste
- **Material:** Plastic
- **Special Feature:** Adhesion, Durability, Flexibility, Marine Grade, Paintable, Waterproof

## Images

![SIKA Sikaflex®-291 Marine Boat Sealant - Elastic, Vibration-Resistant Joint Sealant for Wood, Metal, Plastic & Ceramic | NSF Listed, Low Odor, Over-Paintable, Sandable, 3 fl. oz Tube - Image 1](https://m.media-amazon.com/images/I/41URujSSXoL.jpg)
![SIKA Sikaflex®-291 Marine Boat Sealant - Elastic, Vibration-Resistant Joint Sealant for Wood, Metal, Plastic & Ceramic | NSF Listed, Low Odor, Over-Paintable, Sandable, 3 fl. oz Tube - Image 2](https://m.media-amazon.com/images/I/41rNJ0ttKKL.jpg)
![SIKA Sikaflex®-291 Marine Boat Sealant - Elastic, Vibration-Resistant Joint Sealant for Wood, Metal, Plastic & Ceramic | NSF Listed, Low Odor, Over-Paintable, Sandable, 3 fl. oz Tube - Image 3](https://m.media-amazon.com/images/I/41wUtbupcfL.jpg)
![SIKA Sikaflex®-291 Marine Boat Sealant - Elastic, Vibration-Resistant Joint Sealant for Wood, Metal, Plastic & Ceramic | NSF Listed, Low Odor, Over-Paintable, Sandable, 3 fl. oz Tube - Image 4](https://m.media-amazon.com/images/I/51-W87PShZL.jpg)
![SIKA Sikaflex®-291 Marine Boat Sealant - Elastic, Vibration-Resistant Joint Sealant for Wood, Metal, Plastic & Ceramic | NSF Listed, Low Odor, Over-Paintable, Sandable, 3 fl. oz Tube - Image 5](https://m.media-amazon.com/images/I/518ONfJx8iL.jpg)

## Questions & Answers

**Q: Does the black caulk dry to a gloss, or is it more matte finish, like a dull rubber?**
A: it still retains a dark matte color I would not say dull, but not a gloss finish

**Q: Will it bond to bare aluminum to seal around the rivets?**
A: Yes, I used it to seal my roof fans on my Sprinter.  It adhered to painted metal (scored the paint), wood framing of the opening, plastic shroud and aluminum pressure plates.  I am extremely satisfied with this product and from the day installed, it shows no wear even after a year.  Excellent product...  Another really good product is 3m 4200 Marine Adhesive...

**Q: Will this bond to rubber?**
A: Not sure about rubber, but everything else I happened to get it on and let dry it stuck like paint.  My clothes, stainless railings, fiberglass cabin, teak of course, cork fishing rod handle, my leather wallet. . .

**Q: can you use to adhere spoiler**
A: probably work great

## Customer Reviews

### ⭐⭐⭐⭐⭐ Holds well, good gap filler.
*by J***F on July 21, 2024*

Used this to fill the seam between the hull and deck. Used an electric calking gun allowing for controlled flow into the seams which were 22ft runs from stern to bow. took two tubes of Silkaflex. While fresh it was easy to use a scraper to push this material deeper into the seam and simple to remove excess leaving a smooth seam level with the deck. It took several days to harden to my satisfaction and in the meantime collected a layer of dust onto its surface. Once painted there is a subtle but clear discoloration showing through the paint. It's a good product but as this was a restoration job on a classic wooden boat I think epoxy would have been a better choice. But, no complaints with how this material works and I'm sure it will hold up for some time as the hull and deck flex a bit with movement and with the natural swelling and shrinking inherent in wood.

### ⭐⭐⭐⭐⭐ Silkaflex Boat, RV, General use.
*by D***T on October 28, 2025*

This is really good RTV! I didn't know Silksflex existed until I had to change out a pair of jet drives on a Zodiac Hurricane. Silksflex RTV was the recommended by the OEM manufacturer. I use Silkaflex on Motorhomes, trucks and around my house. Very strong and flexible and seawater resistant.

### ⭐⭐⭐⭐⭐ Would buy again
*by L***A on November 11, 2025*

Great product..worked well..

## Frequently Bought Together

- Sikaflex-291, Black, General All-Purpose Fast Cure Marine Adhesive and sealant. Polyurethane sealant for Boats, 3 fl. oz Tube
- Sika Sikaflex-291 LOT - General All-Purpose Adhesive and sealant, Black - Marine Use - Elastic and Non-Corrosive - 10.1 fl. oz.
- Sikaflex-295 UV Resistant Marine Adhesive Sealant, 10.1 fl. oz Cartridge, White

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*Product available on Desertcart Kyrgyzstan*
*Store origin: KG*
*Last updated: 2026-01-25*