---
product_id: 49495873
title: "W4 Mastic Sealing Strip for Caravans & Motorhomesmm – Grey 32mm Weatherproof Sealant for Overlap Joints, Awning Rails, Roof-Lights, Window Surrounds & External Trims, Durable & Easy to Apply"
brand: "w4"
price: "$59.96"
currency: USD
in_stock: true
reviews_count: 8
url: https://www.desertcart.us/products/49495873-w4-mastic-sealing-strip-for-caravans-and-motorhomesmm-grey-32mm
store_origin: US
region: United States of America
---

# 32mm thickness for robust sealing Weatherproof for all-season protection 5m length covers extensive joints W4 Mastic Sealing Strip for Caravans & Motorhomesmm – Grey 32mm Weatherproof Sealant for Overlap Joints, Awning Rails, Roof-Lights, Window Surrounds & External Trims, Durable & Easy to Apply

**Brand:** w4
**Price:** $59.96
**Availability:** ✅ In Stock

## Summary

> 🛡️ Seal your adventure with confidence—weatherproof protection that lasts!

## Quick Answers

- **What is this?** W4 Mastic Sealing Strip for Caravans & Motorhomesmm – Grey 32mm Weatherproof Sealant for Overlap Joints, Awning Rails, Roof-Lights, Window Surrounds & External Trims, Durable & Easy to Apply by w4
- **How much does it cost?** $59.96 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/49495873-w4-mastic-sealing-strip-for-caravans-and-motorhomesmm-grey-32mm)

## Best For

- w4 enthusiasts

## Why This Product

- Trusted w4 brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Extended Coverage:** Generous 5-meter strip length means fewer replacements and faster application.
- • **All-Weather Warrior:** Engineered to withstand rain, wind, and sun—keeping your vehicle sealed year-round.
- • **Versatile Application:** Perfect for overlap joints, awning rails, roof-lights, window surrounds, and external trims.
- • **Precision Seal Mastery:** 32mm thickness ensures a durable, gap-proof barrier for your caravan or motorhome.
- • **Effortless Installation:** Compact design with included side handle makes sealing quick and mess-free.

## Overview

The W4 Mastic Sealing Strip is a 5-meter long, 32mm thick grey weatherproof sealant designed specifically for caravans and motorhomes. It provides durable, versatile sealing for overlap joints, awning rails, roof-lights, window surrounds, and external trims. Lightweight and compact, it includes a side handle for easy application without the need for batteries or additional tools.

## Description

Full description not available

## Features

- Great Product

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | W4 |
| Part Number | 00017 |
| Product Dimensions | 2.28 x 5.98 x 6.46 cm; 730 g |
| Item model number | 00017 |
| Size | 5m x 32mm |
| Colour | Grey |
| Style | Compact |
| Material | Plastic |
| Thickness | 32 Millimetres |
| Item Package Quantity | 1 |
| Measurement System | Metric |
| Special Features | Versatile sealing |
| Included Components | Side Handle |
| Batteries included? | No |
| Batteries Required? | No |
| Item Weight | 730 g |

## Product Details

- **Brand:** W4
- **Material:** Plastic
- **Colour:** Grey
- **Item thickness:** 32 Millimetres
- **Recommended uses for product:** Waterproofing, re-bedding and waterproofing of external components on recreational vehicles and camping equipment

## Images

![W4 Mastic Sealing Strip for Caravans & Motorhomesmm – Grey 32mm Weatherproof Sealant for Overlap Joints, Awning Rails, Roof-Lights, Window Surrounds & External Trims, Durable & Easy to Apply - Image 1](https://m.media-amazon.com/images/I/71xQV-R04zL.jpg)
![W4 Mastic Sealing Strip for Caravans & Motorhomesmm – Grey 32mm Weatherproof Sealant for Overlap Joints, Awning Rails, Roof-Lights, Window Surrounds & External Trims, Durable & Easy to Apply - Image 2](https://m.media-amazon.com/images/I/71VDyCM54xL.jpg)
![W4 Mastic Sealing Strip for Caravans & Motorhomesmm – Grey 32mm Weatherproof Sealant for Overlap Joints, Awning Rails, Roof-Lights, Window Surrounds & External Trims, Durable & Easy to Apply - Image 3](https://m.media-amazon.com/images/I/71KDQckFEQL.jpg)
![W4 Mastic Sealing Strip for Caravans & Motorhomesmm – Grey 32mm Weatherproof Sealant for Overlap Joints, Awning Rails, Roof-Lights, Window Surrounds & External Trims, Durable & Easy to Apply - Image 4](https://m.media-amazon.com/images/I/71b6o1hHZhL.jpg)
![W4 Mastic Sealing Strip for Caravans & Motorhomesmm – Grey 32mm Weatherproof Sealant for Overlap Joints, Awning Rails, Roof-Lights, Window Surrounds & External Trims, Durable & Easy to Apply - Image 5](https://m.media-amazon.com/images/I/81hXF1W8cdL.jpg)

## Available Options

This product comes in different **Colour Name, Size Name** options.

## Questions & Answers

**Q: Can someone please explain exactly how to use this to fix a leaky sunroof as i cant find any answers on google**
A: Had the same problem with the fan on my van. I took it off and removed all the old sealing first, gave it a good clean and then I marked the outline of the fan on the roof. I then put the sealing tape around these lines like a frame. I used 3 layers and had the edges overlapping to make sure there's not the slightest gap between. After the fan was put in place and the screws were in I sealed the outline with Sikaflex. Worked perfectly and it is 100% waterproof since. I hope this will answer your question and I also hope you understand my description.

**Q: How thick is it**
A: The grey sealing strip is 30 mm wide, 2mm thick on a roll

Eric

**Q: Is this just fora moterhome or can I use it in the house?**
A: Hi,
You can use this around the house, we have kitchen fitters using this to seat kitchen sinks and hobs down with it.

**Q: Is it supplied in black**
A: Hi,
No its not supplied in black im afraid.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Strong and Reliable
*by K***S on 23 June 2023*

I recently purchased the W4 High Performance Mastic Sealing Strip, and I must say it has proven to be an excellent product. This short review aims to highlight the strength and reliability of this sealing strip based on my experience.The W4 High Performance Mastic Sealing Strip offers exceptional strength when it comes to sealing various surfaces. Whether I'm working on my caravan, motorhome, or any other application that requires a reliable seal, this product delivers outstanding performance.One of the standout features of this sealing strip is its remarkable adhesive strength. It securely bonds to different materials, including metal, plastic, glass, and rubber, ensuring a tight and long-lasting seal. The strip creates a barrier against water, dust, and other contaminants, providing added protection and durability.The sealing strip's high-performance mastic material is resistant to harsh weather conditions, UV rays, and temperature fluctuations. This resilience allows it to maintain its strength and effectiveness over time, making it suitable for both indoor and outdoor applications. It provides peace of mind, knowing that the seal remains intact even in challenging environments.Furthermore, the W4 High Performance Mastic Sealing Strip is easy to use. It can be cut to the desired length and applied directly to the intended area. The strip conforms well to irregular surfaces, ensuring a complete and secure seal. Its flexibility allows for easy installation around corners and curves without compromising its strength.The versatility of this sealing strip is worth mentioning as well. It can be used in various applications, including sealing joints, filling gaps, and preventing leaks. Whether it's for automotive purposes, household repairs, or DIY projects, the W4 High Performance Mastic Sealing Strip proves to be a reliable and multipurpose solution.In conclusion, the W4 High Performance Mastic Sealing Strip is a must-have for anyone in need of a strong and reliable seal. Its impressive adhesive strength, durability, and versatility make it a valuable addition to any toolkit or repair supplies.If you're looking for a sealing strip that offers exceptional strength and reliability, look no further. The W4 High Performance Mastic Sealing Strip will exceed your expectations and provide a long-lasting seal in various applications.

### ⭐⭐⭐⭐⭐ Sticky
*by D***S on 27 August 2025*

I use this to stick my extractor fan to my van roof. Works well and is very sticky.Amazing product 👌 highly recommended

### ⭐⭐⭐⭐ Good sealant
*by S***R on 14 April 2024*

This stuff has successfully sealed the front joint on the caravan as the original had broken down and was no longer sealing the joint. The unfortunate thing is that it is sticky on both sides so is picking up all sorts of stuff that I can't wipe off again. I suppose the main function is to seal the joint so from that point of view it works well.

## Frequently Bought Together

- W4 Mastic Sealing Strip for Caravans & Motorhomesmm – Grey 32mm Weatherproof Sealant for Overlap Joints, Awning Rails, Roof-Lights, Window Surrounds & External Trims, Durable & Easy to Apply
- Sika Sikaflex-522 Caravan And Motorhome Adhesive Sealant – Weather And Mould Resistant – White – 300ml
- Caravan Roof Vent Fan, RV Air Vent Ventilation with Rain Sensor, Automatic Level Permanent Reversible Fan 12V for RV Motorhome (14" Black Translucent- Air Max Ultra Quiet-12 volt Fan)

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-02-23*