---
product_id: 48115090
title: "Sika Sikaflex 291i – Marine Sealant and Adhesive – Specifically Designed for The Marine Market – Solvent Free – Black – 70ml Mini Cartridge"
brand: "sika"
price: "€ 29.24"
currency: EUR
in_stock: true
reviews_count: 13
category: "Sika"
url: https://www.desertcart.ie/products/48115090-sika-sikaflex-291i-marine-sealant-and-adhesive-specifically-designed-marine
store_origin: IE
region: Ireland
---

# Marine-grade resistance Highly elastic & waterproof Multipurpose adhesion Sika Sikaflex 291i – Marine Sealant and Adhesive – Specifically Designed for The Marine Market – Solvent Free – Black – 70ml Mini Cartridge

**Brand:** sika
**Price:** € 29.24
**Availability:** ✅ In Stock

## Summary

> ⚓ Seal your marine projects with confidence – don’t let leaks sink your style!

## Quick Answers

- **What is this?** Sika Sikaflex 291i – Marine Sealant and Adhesive – Specifically Designed for The Marine Market – Solvent Free – Black – 70ml Mini Cartridge by sika
- **How much does it cost?** € 29.24 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/48115090-sika-sikaflex-291i-marine-sealant-and-adhesive-specifically-designed-marine)

## 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

- • **Customizable Finish:** Available in black, white, or grey and can be over-painted to perfectly match your boat’s aesthetic.
- • **Mess-Proof Performance:** Non-sag, solvent-free formula ensures smooth application and a clean, reliable finish every time.
- • **One Tube, Endless Uses:** Seals and bonds wood, metal, ceramics, plastics, and more with professional-grade high grab adhesion.
- • **Flexible & Durable Seal:** Moisture-curing polyurethane formula offers superior elasticity to absorb vibrations and prevent leaks.
- • **Engineered for the Marine World:** Specifically designed to withstand saltwater, fresh water, and harsh marine conditions for lasting repairs.

## Overview

Sika Sikaflex 291i is a 70ml solvent-free, marine-specific polyurethane sealant and adhesive designed for internal boat applications. It offers high elasticity, strong adhesion to multiple materials, and professional-grade resistance to fresh and saltwater environments. Available in multiple colors, it cures quickly to form a durable, flexible, and waterproof seal ideal for maintenance and repairs on boats and marine vehicles.

## Description

Shop Sika Sikaflex 291i – Marine Sealant and Adhesive – Specifically Designed for The Marine Market – Solvent Free – Black – 70ml Mini Cartridge. Free delivery on eligible orders of £20 or more.

Review: Fix hatch on my kayak - Tube was easy to use in my application gun and spreads pretty good nice and smooth. Very messy for hands so ensure you wear gloves you can throw away after use. It glues well to your hands and taking 2 days to fade lol. But seems to have done a good job fixing both of my hatches down onto my kayak. Had a slight leak in the seals thought I'd fix it in readiness for next season. I read great reviews and this is mentioned as the best as its designed for boats and has resistance to salt water and fresh all good, the adhesion to plastic was reviewed as really good on other Google review sites not desertcart by the way. I've water tested my kayak with water around the seal a good finish no leaks then I chucked z good size bucket of water as a sort of pressure test gave it a good dowsing of water all good no leaks ... I'd tell anyone to buy its worth the extra money. How long will it last hoping few years, plenty left in the tube. Drying time not on the tube but reviews on a Google search said 24 hrs mine was curing in few hours and after 16hrs I was water testing it so its decent. Just messy be prepared to get this stuff in places you didn't want it. I applied a bit too much and white spirits helped clean up a bit. You don't need loads on lesson learnt the second hatch I fitted to my kayak I used less and its sealed well be aware when you apply force if doing a kayak excess Sealand also goes inside the kayak so I got it on my arms and hands without realising it had gone inside kayak hatch rim lol. Enjoy using it havd gun and if fitting to a kayak hatch like me it's good buy it just take it from me less is better.. Next time thin the amount out on kayak lip... im not a robot really used this gloop highly recommend if you need eater tight. Kev
Review: Marine grade - Great product, worked well

## Features

- May cause an allergic skin reaction.
- SPECIFICALLY DESIGNED FOR THE MARINE MARKET – Highly flexible adhesive and sealant suited for most internal boat sealing applications.
- MULTIPURPOSE – Use it as a sealant or adhesive on wood, metal, ceramics, plastics and more for high grab adhesion and seals.
- HIGHLY ELASTIC – This moisture-curing, non-sag 1-component polyurethane sealant and adhesive is highly flexible and works well in areas prone to strong vibrations.
- PROVIDES PROFESSIONAL-GRADE RESISTANCE – Resistant to fresh water, sea water, limewater, sewage effluent diluted acids and much more providing suitability for repairs and maintenance on boats and marine vehicles.
- MULTIPLE COLOURS AVAILABLE – Choose from black, white or grey to suit your space, or over-paint it when dry.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00UN3UNL0 |
| Batteries Required? | No |
| Best Sellers Rank | 6,555 in DIY & Tools ( See Top 100 in DIY & Tools ) 140 in Sealers |
| Colour | Black |
| Customer Reviews | 4.6 4.6 out of 5 stars (828) |
| Date First Available | 12 May 2015 |
| Included components | 1x Cartridge |
| Item Package Quantity | 1 |
| Item Weight | 0.1 g |
| Item model number | 291i |
| Manufacturer | Sika Everbuild |
| Material | Polyurethane |
| Part number | 9091567 |
| Product Dimensions | 5 x 5 x 23 cm; 0.1 g |
| Special Features | Marine-Specific Resistance and High Elasticity |
| Specific uses | Marine |
| Style | 70 ml Mini Tube (Does not require an application gun) |
| Volume | 70 Millilitres |

## Product Details

- **Brand:** Sika
- **Item form:** Paste
- **Material:** Polyurethane
- **Special feature:** Marine-Specific Resistance and High Elasticity
- **Specific uses for product:** Marine

## Images

![Sika Sikaflex 291i – Marine Sealant and Adhesive – Specifically Designed for The Marine Market – Solvent Free – Black – 70ml Mini Cartridge - Image 1](https://m.media-amazon.com/images/I/51oisHrs4-L.jpg)

## Questions & Answers

**Q: Is this any good for sticking treadmaster/rubber anti slip deck sheets on a boat?**
A: Suitability will depend on the rubber unfortunately, would check with the sheet manufacture for the type of adhesive to be used.

**Q: Is this aquarium safe**
A: sadly, no

**Q: Will this stick wood to polypropolene plastic?**
A: Hi, no this is not suitable for polypropylene unfortunately.

**Q: is this suitable to repair a small tear in an above ground swimming pool**
A: No reason for it not to work, I use it all the time to water proof my boat.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Fix hatch on my kayak
*by K***S on 2 October 2022*

Tube was easy to use in my application gun and spreads pretty good nice and smooth. Very messy for hands so ensure you wear gloves you can throw away after use. It glues well to your hands and taking 2 days to fade lol. But seems to have done a good job fixing both of my hatches down onto my kayak. Had a slight leak in the seals thought I'd fix it in readiness for next season. I read great reviews and this is mentioned as the best as its designed for boats and has resistance to salt water and fresh all good, the adhesion to plastic was reviewed as really good on other Google review sites not amazon by the way. I've water tested my kayak with water around the seal a good finish no leaks then I chucked z good size bucket of water as a sort of pressure test gave it a good dowsing of water all good no leaks ... I'd tell anyone to buy its worth the extra money. How long will it last hoping few years, plenty left in the tube. Drying time not on the tube but reviews on a Google search said 24 hrs mine was curing in few hours and after 16hrs I was water testing it so its decent. Just messy be prepared to get this stuff in places you didn't want it. I applied a bit too much and white spirits helped clean up a bit. You don't need loads on lesson learnt the second hatch I fitted to my kayak I used less and its sealed well be aware when you apply force if doing a kayak excess Sealand also goes inside the kayak so I got it on my arms and hands without realising it had gone inside kayak hatch rim lol. Enjoy using it havd gun and if fitting to a kayak hatch like me it's good buy it just take it from me less is better.. Next time thin the amount out on kayak lip... im not a robot really used this gloop highly recommend if you need eater tight. Kev

### ⭐⭐⭐⭐⭐ Marine grade
*by W***Y on 15 September 2025*

Great product, worked well

### ⭐⭐⭐⭐ Very effective product
*by D***. on 25 May 2023*

Have used this in the past, excellent water resistance and really good for boat repairs. It is expensive but most really good products are. It was very reluctant to come out of the tube so I had to squeeze the gun incredibly hard to get it out. Don’t know if this was just my tube, perhaps it was quite old or is it always like this. Don’t remember that being the case last time I used it. Does a great job though.

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*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-01-29*