---
product_id: 95255185
title: "Osmo Gap Sealer 310ml - Flexible Sealant for Wood Floors (Walnut)"
brand: "osmo"
price: "153 zł"
currency: PLN
in_stock: true
reviews_count: 8
category: "Osmo"
url: https://www.desertcart.pl/products/95255185-osmo-gap-sealer-310ml-flexible-sealant-for-wood-floors-walnut
store_origin: PL
region: Poland
---

# Fills 30+ linear metres of 3mm gaps Flexible acrylic sealant ideal for wood & mixed materials Single-component, easy application & sanding Osmo Gap Sealer 310ml - Flexible Sealant for Wood Floors (Walnut)

**Brand:** osmo
**Price:** 153 zł
**Availability:** ✅ In Stock

## Summary

> 🪵 Seal the gap, not your style — flawless floors start here!

## Quick Answers

- **What is this?** Osmo Gap Sealer 310ml - Flexible Sealant for Wood Floors (Walnut) by osmo
- **How much does it cost?** 153 zł with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/95255185-osmo-gap-sealer-310ml-flexible-sealant-for-wood-floors-walnut)

## Best For

- osmo enthusiasts

## Why This Product

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

## Key Features

- • **Trusted Quality:** Backed by Osmo’s legacy and 4.3-star rating from 700+ pros who demand reliability.
- • **Flexible & Durable:** Plasto-elastic acrylic formula stays elastic long after curing, adapting to wood floor movements.
- • **Professional Finish:** Matte finish blends naturally with walnut floors, allowing sanding for a smooth, flawless look.
- • **Seamless Gap Mastery:** Effortlessly fills over 30 linear metres of 3mm gaps—maximize coverage with one tube.
- • **Multi-Surface Compatibility:** Perfect for wood, stone, concrete, plaster, PVC, iron, and aluminum joints—versatility meets precision.

## Overview

Osmo Gap Sealer 310ml is a premium single-component acrylic sealant designed for internal use on wood floors and various building materials. It offers flexible, long-lasting elasticity, fills over 30 linear metres of 3mm gaps, and provides a matte walnut finish that can be sanded for a seamless look. Ideal for professionals seeking durable, versatile, and easy-to-apply gap sealing solutions.

## Description

High quality, one component, flexible sealant that has plasto-elastic qualities. It is acrylic based and suitable for internal projects only. Can be used for filling, fixing and repairing all manner of splits and gaps as well as sealing and filling joints on both finished and unfinished wood flooring, skirting and door thresholds.

Review: Excellent mastik - Excellent mastik, easy to apply, excellent covering/filling. Even possible to sandpaper. I have used other osmo products which is why I chose this and it has lived up to my expectations.
Review: Good product. - It is like with silicone - you have to squeeze it in AND smooth it. It leaves a matt finish so the floor has no gaps but is not smooth in colour / shade. Overall, does the job and is good value for money.

## Features

- OSMO UK - GAP SEALER is a single component acrylic sealant
- Should NOT be used for sealing joints permanently exposed to water
- Resistant to air conditions, stay elastic a long time after curing
- Uses: Joints in stone, wood, concerete, plaster, brick works, PVC, iron, aliminium
- Based on 3mm gaps a 310ml tube will fill in excess of 30 linear metres

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B010SVKTYM |
| Batteries Required? | No |
| Batteries included? | No |
| Best Sellers Rank | 3,820 in DIY & Tools ( See Top 100 in DIY & Tools ) 95 in Sealers |
| Colour | Walnut |
| Customer Reviews | 4.3 4.3 out of 5 stars (730) |
| Date First Available | 2 July 2015 |
| Item Package Quantity | 1 |
| Item Weight | 540 g |
| Manufacturer | Osmo |
| Manufacturer reference | OS-GPSLR |
| Material | Acrylic |
| Part number | OS-GPSLR |
| Product Dimensions | 16 x 34 x 440 cm; 540 g |
| Style | Compact |

## Product Details

- **Brand:** Osmo
- **Colour:** Walnut
- **Full cure time:** 24 Hours
- **Item weight:** 0.54 Kilograms
- **Liquid volume:** 310 Millilitres

## Images

![Osmo Gap Sealer 310ml - Flexible Sealant for Wood Floors (Walnut) - Image 1](https://m.media-amazon.com/images/I/31V8MkOqpXL.jpg)
![Osmo Gap Sealer 310ml - Flexible Sealant for Wood Floors (Walnut) - Image 2](https://m.media-amazon.com/images/I/31c1uIazyZL.jpg)
![Osmo Gap Sealer 310ml - Flexible Sealant for Wood Floors (Walnut) - Image 3](https://m.media-amazon.com/images/I/41DYYMtj18L.jpg)
![Osmo Gap Sealer 310ml - Flexible Sealant for Wood Floors (Walnut) - Image 4](https://m.media-amazon.com/images/I/41NyjUAvJhL.jpg)
![Osmo Gap Sealer 310ml - Flexible Sealant for Wood Floors (Walnut) - Image 5](https://m.media-amazon.com/images/I/5114T3m8cqL.jpg)

## Available Options

This product comes in different **Color** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Excellent mastik
*by A***R on 17 September 2025*

Excellent mastik, easy to apply, excellent covering/filling. Even possible to sandpaper. I have used other osmo products which is why I chose this and it has lived up to my expectations.

### ⭐⭐⭐⭐ Good product.
*by K***A on 13 August 2024*

It is like with silicone - you have to squeeze it in AND smooth it. It leaves a matt finish so the floor has no gaps but is not smooth in colour / shade. Overall, does the job and is good value for money.

### ⭐⭐⭐⭐⭐ Wide range of colours
*by D***E on 18 October 2024*

Amazing that this comes in so many colours so we could colour match to the wooden window reveals in our kitchen - very reasonably priced for a high quality product and easy to use.

## Frequently Bought Together

- Osmo Gap Sealer 310ml - Flexible Sealant for Wood Floors (Walnut)
- Unibond Sealant Finishing Tool, Effective Sealant Tool for a Smooth & Professional Finish, Sealant Smoother for All Sealants, Silicone Sealant Tool for Wall & Floor Applications

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**Shop now:** [https://www.desertcart.pl/products/95255185-osmo-gap-sealer-310ml-flexible-sealant-for-wood-floors-walnut](https://www.desertcart.pl/products/95255185-osmo-gap-sealer-310ml-flexible-sealant-for-wood-floors-walnut)

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*Product available on Desertcart Poland*
*Store origin: PL*
*Last updated: 2026-02-09*