---
product_id: 53498334
title: "Sikaflex-291 LOT, Mahogany, Marine Adhesive & Sealant, Long Open Time PU Sealant, All-Purpose for Above/Below Water Line, NSF Approved 10.1 fl oz,"
brand: "sika"
price: "204 Lei"
currency: RON
in_stock: true
reviews_count: 8
category: "Sika"
url: https://www.desertcart.ro/products/53498334-sikaflex-291-lot-mahogany-marine-adhesive-and-sealant-long-open
store_origin: RO
region: Romania
---

# 4-hour skinning time Marine-grade adhesion Highly elastic & durable Sikaflex-291 LOT, Mahogany, Marine Adhesive & Sealant, Long Open Time PU Sealant, All-Purpose for Above/Below Water Line, NSF Approved 10.1 fl oz,

**Brand:** sika
**Price:** 204 Lei
**Availability:** ✅ In Stock

## Summary

> ⚓ Seal your legacy with marine-grade strength and style!

## Quick Answers

- **What is this?** Sikaflex-291 LOT, Mahogany, Marine Adhesive & Sealant, Long Open Time PU Sealant, All-Purpose for Above/Below Water Line, NSF Approved 10.1 fl oz, by sika
- **How much does it cost?** 204 Lei with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/products/53498334-sikaflex-291-lot-mahogany-marine-adhesive-and-sealant-long-open)

## 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

- • **Paintable & Sandable Finish:** Achieve a flawless, professional look with easy overpainting and sanding.
- • **Resistant to Harsh Elements:** Withstands fresh/saltwater, diluted acids, fuels, and oils for all-weather confidence.
- • **Durability Meets Flexibility:** Non-corrosive, vibration-resistant elasticity ensures lasting joint integrity.
- • **Long Open Time for Precision:** 4-hour working window lets you perfect every seal without rush or mess.
- • **Unmatched Marine Versatility:** Bonds wood, fiberglass, metal above & below waterline for ultimate marine resilience.

## Overview

SIKA Sikaflex-291 LOT is a mahogany-colored, one-component polyurethane marine adhesive and sealant designed for superior bonding on wood, fiberglass, and metal surfaces both above and below the waterline. Featuring a long 4-hour open time and full cure in 5-7 days, it offers high elasticity, corrosion resistance, and is paintable and sandable for a professional finish. NSF approved and resistant to fresh and saltwater, diluted acids, fuels, and oils, it’s the go-to sealant for durable, vibration-resistant marine and industrial applications.

## Description

If you need a marine-grade sealant that creates a strong, secure bond with a wide array of surfaces commonly found in marine applications, Sikaflex-291 LOT's mahogany sealant is the ideal choice. It's specially designed for use where a long working time is needed, and cooler temperatures can extend the curing period. The typical skinning period is four hours, after which it can be painted for a more professional finish. Sikaflex-291 LOT is a self-leveling marine grade sealant, so you won't need to tool it down for an even surface. 10.1 fl. oz. cartridges fit conveniently on a variety of piston guns.

Review: As expected - Works good.
Review: Easy to apply, looks like a good seal - I used it to seal between the body and the bottom pan of a 1970s VW Beetle I'm rebuilding. It'll take me months to find if the seal provided by this product is durable. But for now, it looks encouraging. Also, it is rated for "below the waterline", and that should be more than sufficient overkill for a Volkswagen. As I had to apply the sealant from below the car, it dripped a little bit but not badly. The product flows into place readily and can be smoothed, like caulk, with a gloved (!!!) finger. Go without gloves and have a very messy clean-up coming. The product dries to a deep glossy black. As it is paintable, I plan to spray the bottom of the car with undercoating for protection. The seals cured overnight and look confidence-inspiring.

## Features

- IDEAL FOR MARINE APPLICATIONS — Sika 291 adheres to material commonly used in marine construction, such as wood, fiberglass, metal, and metal primers and paint coatings. Use above or below water line
- VERSATILE AND DURABLE — It is non-corrosive and highly elastic making vibration-resistant joint seals on decking. Can be used in an array of interior contexts
- FORMULATED FOR PERFORMANCE — This one-component polyurethane marine-grade sealant cures upon exposure to atmospheric moisture. The mahogany sealant can be overpainted and sanded without loss of stability
- RESISTANT TO BOTH FRESH AND SALTWATER — Will also resist diluted acids and caustic solutions. Provides temporary resistance to fuels, mineral oils, and vegetable and animal fats
- EASY APPLICATION — Use a manual, pneumatic, or electric-driven piston gun to apply this one-component polyurethane paste. Surface should be clean and dry prior to application for optimal performance

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000XBDBPW |
| Best Sellers Rank | #22,036 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #12 in Polyurethane Adhesives #37 in Urethane Adhesives |
| Brand | SIKA |
| Brand Name | SIKA |
| Color | Mahogany |
| Customer Reviews | 4.5 out of 5 stars 322 Reviews |
| Full Cure Time | 5-7 Days |
| Global Trade Identification Number | 00033886005296 |
| Included Components | Sealant |
| Initial Hardening Time | 2 Hours |
| Item Form | Liquid |
| Item Height | 11.5 inches |
| Item Type Name | Adhesive |
| Item Weight | 10.1 Ounces |
| Liquid Volume | 10.1 Fluid Ounces |
| Manufacturer | Sika USA |
| Material Type | Polyurethane |
| Maximum Gap Fill | 4 Inches |
| Surface Recommendation | Walls, Tub, Deck, Pipe |
| Temperature Range | 40-100 Degrees Fahrenheit |
| UPC | 033886005296 |
| Unit Count | 10.1 Fluid Ounces |
| Water Resistance Level | Water Resistant |

## Product Details

- **Color:** Mahogany
- **Brand:** SIKA
- **Item Weight:** 10.1 Ounces
- **Liquid Volume:** 10.1 Fluid Ounces
- **Full Cure Time:** 5-7 Days

## Images

![Sikaflex-291 LOT, Mahogany, Marine Adhesive & Sealant, Long Open Time PU Sealant, All-Purpose for Above/Below Water Line, NSF Approved 10.1 fl oz, - Image 1](https://m.media-amazon.com/images/I/51GrKuGzegL.jpg)

## Available Options

This product comes in different **Color, Size, Number Of Items** options.

## Questions & Answers

**Q: Will this work to repair cracks in my pool skimmer? Is it elastic or hard like epoxy when cured?**
A: It is elastomeric and should work well for that I would think.  I used it to seal the roof seams on a 2015 GMC pickup and it worked great.  Keep in mind it is self leveling so it spreads out a bit on its own.

**Q: Would this work for adhering rubber matting to a wooden and aluminum boat deck?**
A: yes, it would work. A permanent solution would be 3M 5200 sealant. Try a small piece first!

**Q: can i use this to attach solar panels to camper roof? pnls weigh 24pnds.**
A: I used mine for water proofing sealant while glueing down a metal flang which weighed very little. Not sure about the solar panels

**Q: Would this work in a swimming pool.  I have a concrete pool that has plexiglass windows in the sides below the water level.**
A: I believe so, we use it on the seams of our water slide that's underwater at all times.

## Customer Reviews

### ⭐⭐⭐⭐⭐ As expected
*by R***Y on December 18, 2025*

Works good.

### ⭐⭐⭐⭐⭐ Easy to apply, looks like a good seal
*by E***. on March 2, 2024*

I used it to seal between the body and the bottom pan of a 1970s VW Beetle I'm rebuilding. It'll take me months to find if the seal provided by this product is durable. But for now, it looks encouraging. Also, it is rated for "below the waterline", and that should be more than sufficient overkill for a Volkswagen. As I had to apply the sealant from below the car, it dripped a little bit but not badly. The product flows into place readily and can be smoothed, like caulk, with a gloved (!!!) finger. Go without gloves and have a very messy clean-up coming. The product dries to a deep glossy black. As it is paintable, I plan to spray the bottom of the car with undercoating for protection. The seals cured overnight and look confidence-inspiring.

### ⭐⭐⭐⭐⭐ Oh yeah
*by G***T on October 5, 2025*

Grabbed some rubber to make a cover for the saildrive port on my sailboat; it keeps barnacles out. I wasn't expecting this to hold at all for months underwater and under sail. Still there six months later. I am amazed.

## Frequently Bought Together

- Sikaflex-291 LOT, Mahogany, Marine Adhesive and sealant, General All-Purpose PU Adhesive with Long Open time, 10.1 fl. oz
- Sikaflex-291, White, General All-Purpose Fast Cure Marine Adhesive and sealant. Polyurethane sealant for Boats, 10.1 fl. oz Cartridge
- Sika Sikaflex-221 - Black - Multi-Purpose Polyurethane sealant/Adhesive - Creates Permanent Elastic Seal - Sandable/paintable - Non-Corrosive - 10.1 fl oz

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*Product available on Desertcart Romania*
*Store origin: RO*
*Last updated: 2026-03-02*