--- product_id: 48713368 title: "W4 Mastic Sealing Strip 19mm x 5m Grey Waterproof Butyl Caravan Tape" brand: "w4" price: "Β₯3889" currency: JPY in_stock: true category: "W4" url: https://www.desertcart.jp/products/48713368-w4-mastic-sealing-strip-19mm-x-5m-grey-waterproof-butyl store_origin: JP region: Japan --- # Flexible Butyl Formula 100% Waterproof Seal UV Resistant Durability W4 Mastic Sealing Strip 19mm x 5m Grey Waterproof Butyl Caravan Tape **Brand:** w4 **Price:** Β₯3889 **Availability:** βœ… In Stock ## Summary > πŸ’Ό Seal Smart, Travel Confidently – The Pro’s Choice for Caravan Care ## Quick Answers - **What is this?** W4 Mastic Sealing Strip 19mm x 5m Grey Waterproof Butyl Caravan Tape by w4 - **How much does it cost?** Β₯3889 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/48713368-w4-mastic-sealing-strip-19mm-x-5m-grey-waterproof-butyl) ## 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 - β€’ **Flexibility That Lasts:** Engineered to stay pliable, preventing cracks and maintaining seals through every journey. - β€’ **Precision Fit for Every Joint:** Narrow 19mm width and 5m length roll designed for seamless application on trims and vents. - β€’ **UV Shield for Outdoor Endurance:** Resists sun damage to keep your caravan looking sharp and sealed season after season. - β€’ **Unbeatable Waterproof Protection:** Create a watertight fortress around your caravan fittings with high-performance butyl sealing. - β€’ **Trusted by Thousands of Adventurers:** Join over 2,000 satisfied users who rely on W4 for caravan and motorhome protection. ## Overview The W4 Mastic Sealing Strip is a 19mm x 5m grey butyl tape designed specifically for caravans and motorhomes. It offers a waterproof, flexible, and UV-resistant seal that prevents water ingress around rooflights, vents, awning rails, and trims. Its durable yet pliable formula ensures long-lasting protection without cracking, making it an essential maintenance product for outdoor vehicle enthusiasts. Backed by a 1-year warranty and trusted by thousands, it’s the go-to sealing solution for professional-grade caravan upkeep. ## Description W4 Mastic Sealing Strip 19mm x 5m Grey Waterproof Butyl Caravan Tape | Flexible UV resistant sealant for caravan rooflights, windows, awning rails, vents, exterior trims and re-bedding fittings : desertcart.co.uk: Business, Industry & Science ## Features - WATERPROOF BUTYL SEAL – High-performance W4 grey butyl mastic tape forms a waterproof seal around caravan and motorhome fittings, helping prevent water penetration around joints, trims and external fittings. - REMAINS FLEXIBLE – Specially formulated butyl sealing strip remains flexible throughout its service life, allowing it to accommodate normal movement around caravan and motorhome fittings without hardening or cracking. - CARAVAN & MOTORHOME USE – Ideal for sealing and re-bedding rooflights, vents, awning rails, window surrounds, exterior lights, grab handles, aluminium mouldings, overlap joints and external trims. - UV RESISTANT FOR EXTERIOR USE – Good UV resistance provides long-lasting performance for exposed caravan and motorhome applications while excellent adhesion helps create a reliable seal. - 19MM x 5M EASY-APPLY ROLL – Convenient narrow 19mm wide x 5m roll is ideal for smaller fittings and joints. Apply to a clean, dry surface, remove the backing paper and firmly secure the joint. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0036APFJM | | Best Sellers Rank | 10,986 in DIY & Tools ( See Top 100 in DIY & Tools ) 106 in Sealing Tape | | Brand | W4 | | Colour | Grey | | Customer Reviews | 4.6 4.6 out of 5 stars (2,065) | | Global Trade Identification Number | 05019328000161 | | Included Components | 1 x W4 Grey Mastic Tape Roll | | Item Dimensions L x W | 19W millimetres | | Item Highlight | Flexible UV resistant sealant for caravan rooflights, windows, awning rails, vents, exterior trims and re-bedding fittings | | Item Thickness | 19 Millimetres | | Item Type Name | W4 W4 Narrow Mastic Sealing Strip - 5m x 19mm - Off-White, | | Item Weight | 222 g | | Manufacturer | W4 | | Manufacturer Warranty Description | 1 year. | | Material | Butyl | | Model Number | W4 Mastic | | Number of Items | 1 | | Number of Packs | 1 | | Part Number | 00016 | | Recommended Uses For Product | Sealing overlap joints, awning rails, roof-lights, vents, and window surrounds on caravans and motorhomes | | Unit Count | 5.0 meter | ## Product Details - **Brand:** W4 - **Colour:** Grey - **Item thickness:** 19 Millimetres - **Material:** Butyl - **Product dimensions:** 19W millimetres ## Images ![W4 Mastic Sealing Strip 19mm x 5m Grey Waterproof Butyl Caravan Tape - Image 1](https://m.media-amazon.com/images/I/51DpAJiH8HL.jpg) ![W4 Mastic Sealing Strip 19mm x 5m Grey Waterproof Butyl Caravan Tape - Image 2](https://m.media-amazon.com/images/I/51roLBnsLML.jpg) ![W4 Mastic Sealing Strip 19mm x 5m Grey Waterproof Butyl Caravan Tape - Image 3](https://m.media-amazon.com/images/I/41oOLxq9TeL.jpg) ![W4 Mastic Sealing Strip 19mm x 5m Grey Waterproof Butyl Caravan Tape - Image 4](https://m.media-amazon.com/images/I/51qaUVP+KzL.jpg) ![W4 Mastic Sealing Strip 19mm x 5m Grey Waterproof Butyl Caravan Tape - Image 5](https://m.media-amazon.com/images/I/51PeXDW9NrL.jpg) ## Available Options This product comes in different **Color, Size** options. ## Frequently Bought Together - W4 Mastic Sealing Strip for Caravans & Motorhomesmm – Grey 19mm 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 - Roof Sky Light Caravan Motorhome 400 x 400mm Flynet White MPK Rooflight --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.jp/products/48713368-w4-mastic-sealing-strip-19mm-x-5m-grey-waterproof-butyl](https://www.desertcart.jp/products/48713368-w4-mastic-sealing-strip-19mm-x-5m-grey-waterproof-butyl) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-09-15*