--- product_id: 450215166 title: "TERRM750 Thompsons Emergency Roof Repair Mastic 750 ml, Black" brand: "ronseal" price: "VT30958" currency: VUV in_stock: true reviews_count: 5 category: "Ronseal" url: https://www.desertcart.vu/products/450215166-terrm750-thompsons-emergency-roof-repair-mastic-750-ml-black store_origin: VU region: Vanuatu --- # fast 1-day full cure time waterproof & underwater adhesion 750 ml high-viscosity mastic TERRM750 Thompsons Emergency Roof Repair Mastic 750 ml, Black **Brand:** ronseal **Price:** VT30958 **Availability:** ✅ In Stock ## Summary > 🛡️ Seal the leaks before they sneak – Roof repair redefined! ## Quick Answers - **What is this?** TERRM750 Thompsons Emergency Roof Repair Mastic 750 ml, Black by ronseal - **How much does it cost?** VT30958 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/450215166-terrm750-thompsons-emergency-roof-repair-mastic-750-ml-black) ## Best For - ronseal enthusiasts ## Why This Product - Trusted ronseal brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **All-Weather Ready:** Applies easily even in rain, sealing leaks instantly to protect your home from unexpected downpours. - • **Quick & Efficient:** 750 ml bottle with ergonomic design for easy trowel application and full cure in just 24 hours. - • **Versatile Adhesion:** Bonds to virtually any roofing material, including metal, ensuring a seamless fix every time. - • **Flexible & Long-Lasting:** Fibres added for crack-filling that stays flexible, preventing future splits and extending roof life. - • **Industrial-Grade Strength:** Developed from North Sea oil rig tech for unmatched durability and reliability. ## Overview RONSEAL TERRM750 Thompsons Emergency Roof Repair Mastic is a 750 ml high-viscosity, black mastic designed for rapid, durable roof repairs. Engineered with technology from North Sea oil rigs, it adheres underwater and to nearly all roofing materials, providing waterproof, flexible crack-filling with a fast 1-day cure time. Ideal for professionals and DIYers seeking a reliable, all-weather emergency fix. ## Description Product Description Thompson's Emergency Roof Repair Mastic has been developed from technology used on North Sea oil rigs, Thompson's Emergency Roof Repair Mastic is a trowel applied mastic with the ability to adhere to virtually any roofing material even underwater. With added fibres and a high solids content, Thompson's Emergency Roof Repair Mastic has been developed for filling, plugging and repairing cracks and splits, targeting leaks at the source of the problem. Set Contains: 1x 750 ml Thompsons Emergency Roof Repair Mastic Review: Application was easy, even in the rain, and has filled some large cracks in the roof covering that have appeared during the last 12 months but which had gone unnoticed until the heavy and frequent rain showers that substituted for "summer 2024". Have reapplied where I wasn't convinced that the coverage was adequate, even though the underside of the roof was drying out; this revealed that the mastic "skins" but stays flexible, which bolds well for lasting until I can effect a more permanent repair. TBH, this surpassed my expectations so I am more that pleased with the outcome, thus far. Review: Excellent product. ## Features - Easy application - Ergonomic design - Easy to use ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B002SHSZYQ | | ASIN | B002SHSZYQ | | Brand Name | RONSEAL | | Color | Black | | Compatible Material | Metal | | Container Type | Bottle | | Customer Reviews | 4.5 4.5 out of 5 stars (189) | | Customer reviews | 4.5 4.5 out of 5 stars (189) | | Date First Available | 7 August 2012 | | Full Cure Time | 1 Days | | Global Trade Identification Number | 05010214860821 | | Is Discontinued By Manufacturer | No | | Item Form | Liquid | | Item Package Quantity | 1 | | Item Weight | 1.01 Kilograms | | Item model number | RSLTERRM750 | | Manufacturer | Ronseal | | Manufacturer | Ronseal | | Material Type | Mastic | | Model | RSLTERRM750 | | Other Special Features of the Product | Adhesive Underwater, High-Strength Filling Ability | | Product Dimensions | 12 x 9.9 x 10 cm; 1.01 kg | | Specific Uses For Product | roof | | Unit Count | 750 Milliliters | | Viscosity | High | | Volume | 750 Milliliters | | Water Resistance Level | Waterproof | ## Product Details - **Brand:** RONSEAL - **Item form:** Liquid - **Material:** Mastic - **Special features:** Adhesive Underwater, High-Strength Filling Ability - **Specific uses for product:** roof ## Images ![TERRM750 Thompsons Emergency Roof Repair Mastic 750 ml, Black - Image 1](https://m.media-amazon.com/images/I/716kyPHScAL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by P***Y on 6 October 2024* Application was easy, even in the rain, and has filled some large cracks in the roof covering that have appeared during the last 12 months but which had gone unnoticed until the heavy and frequent rain showers that substituted for "summer 2024". Have reapplied where I wasn't convinced that the coverage was adequate, even though the underside of the roof was drying out; this revealed that the mastic "skins" but stays flexible, which bolds well for lasting until I can effect a more permanent repair. TBH, this surpassed my expectations so I am more that pleased with the outcome, thus far. ### ⭐⭐⭐⭐⭐ Review *by K***E on 16 October 2025* Excellent product. ### ⭐⭐⭐⭐ Review *by J***P on 30 January 2023* My 2 year old garden shed recently began to leak. I suspected the water was getting in past the felt nails, as they had been hammered in slightly too far, and had left a minute gap around some of the nail heads. I initially tried using black bitumen paint, but this didn't provide a complete cure, as the inside of the shed roof was still wet to the touch. I needed something more substantial, and this stuff seemed like it could offer the solution. So, having got myself a 750ml tin from Amazon, I gave it a go, spreading it on and around the suspect area, covering the nail heads and any overlaps on the felt. It is fairly easy to apply, but it's best to wear gloves, and have white spirt handy to wipe up spills and unintentional smudges on clothes. From reading the instructions on the tin, a thick ( around 3mm ) applications is best. It does look like it is going to do the job, but as I type this there has been no prolonged rain in my area, hence the 4 stars for the overall rating. I remain confident, and would use this stuff again if needed..... ## Frequently Bought Together - Ronseal TERRM750 Thompsons Emergency Roof Repair Mastic 750 ml, Black - fowong Waterproof Tape, 50mm(W) x 5M(L) Butyl Tape, Waterproof Tape for Leaks and Outdoor Use, Flashing Tape for Roof Sealant, Roof Repair Tape for Repairing Roof Crack, Gutter, RV Repair --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.vu/products/450215166-terrm750-thompsons-emergency-roof-repair-mastic-750-ml-black](https://www.desertcart.vu/products/450215166-terrm750-thompsons-emergency-roof-repair-mastic-750-ml-black) --- *Product available on Desertcart Vanuatu* *Store origin: VU* *Last updated: 2026-05-06*