--- product_id: 50087866 title: "Sika Black Jack 903 Bitumen Trowel Mastic, Black, 5 Litre" brand: "sika" price: "$151.54" currency: USD in_stock: true reviews_count: 9 url: https://www.desertcart.us/products/50087866-sika-black-jack-903-bitumen-trowel-mastic-black-5-litre store_origin: US region: United States of America --- # Fast drying in 24 hours Available in multiple sizes up to 5L Flexible for lasting durability Sika Black Jack 903 Bitumen Trowel Mastic, Black, 5 Litre **Brand:** sika **Price:** $151.54 **Availability:** ✅ In Stock ## Summary > 🖤 Seal it, fix it, forget it — the black jack of all trades! ## Quick Answers - **What is this?** Sika Black Jack 903 Bitumen Trowel Mastic, Black, 5 Litre by sika - **How much does it cost?** $151.54 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/50087866-sika-black-jack-903-bitumen-trowel-mastic-black-5-litre) ## 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 - • **Ready to Use:** No thinning required—apply straight from the tin with a trowel or putty knife. - • **Rapid Results:** Skins over in just 24 hours so your project moves forward faster. - • **Unmatched Flexibility:** Stays pliable to absorb moderate movement without cracking or peeling. - • **Versatile Application:** Seals and fills holes on roofing felt, metal, concrete, timber, and more. - • **Size Options for Every Job:** Choose from 1L, 2.5L, or 5L tins to match your project scale perfectly. ## Overview Sika Black Jack 903 Bitumen Trowel Mastic is a premium, flexible black sealant designed for roofing and waterproofing applications. It dries quickly within 24 hours, adheres to a wide range of materials including metal, concrete, and timber, and comes ready to use in multiple sizes up to 5 litres. Trusted by professionals for durable, versatile sealing and filling solutions. ## Description Our products might not always be visible but the results they achieve are clear to see. From providing top quality adhesives for your home or bonding one in every three car windscreens worldwide… . Our comprehensive range of products for bonding, sealing, damping, reinforcing, and protecting in the building sector and motor vehicle industry, benefit from more than 110 years of and . Everbuild – A Sika Company are the UK and Ireland’s largest manufacturer of sealants, adhesives, DIY products, powders and building chemicals. Everbuild are proud to be home to the trade’s most respected products which have been enhanced over the years by class-leading research and facilities. With unique technology including i-Cure and Active Resin Technology, Everbuild’s product development activity is relentlessly setting industry standards at the highest quality and leading the field in solving the problems of the future, today. ## Features - FLEXIBLE – Remains flexible for long periods after application to allow for moderate movement. - VERSATILE – Suitable for sealing and filling holes in mastic asphalt, roofing felt, corrugated iron, metal guttering and downpipes, as well as waterproofing, stopping, bedding, bonding and sealing applications. - FAST DRYING – Fast drying, skinning over in just 24 hours. Adheres to and fills holes in mastic asphalt, roofing felt, corrugated iron, cast iron, fibre cement, slates, lead, copper, zinc, concrete and timber. - EASY TO USE – Ready to use and does not need to be diluted with thinner. Apply using a steel trowel or putty knife. - DIFFERENT QUANTITIES – Available in 1-litre, 2.5-litre and 5-litre tins for tackling a variety of jobs. ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B0073S5P2A | | Batteries Included | No | | Batteries Required | No | | Best Sellers Rank | 58,710 in DIY & Tools (See Top 100 in DIY & Tools) 43 in Roof Coatings & Paints | | Colour | Black | | Customer Reviews | 4.6 4.6 out of 5 stars (176) 4.6 out of 5 stars | | Date First Available | 31 Jan. 2012 | | Delivery Information | We cannot deliver certain products outside mainland UK ( Details). We will only be able to confirm if this product can be delivered to your chosen address when you enter your delivery address at checkout. | | Guaranteed Software Updates Until | unknown | | Included Components | B/J BITUMEN TROWEL MASTIC 5LT | | Item Model Number | 903 | | Item Package Quantity | 1 | | Item Weight | 6.12 kg | | Manufacturer | Sika Everbuild | | Material | Iron | | Part Number | 004952 | | Power Source | ac | | Product Dimensions | 18 x 18 x 23.5 cm; 6.12 kg | | Size | 5 Litre | ## Images ![Sika Black Jack 903 Bitumen Trowel Mastic, Black, 5 Litre - Image 1](https://m.media-amazon.com/images/I/71N8bl17wzL.jpg) ![Sika Black Jack 903 Bitumen Trowel Mastic, Black, 5 Litre - Image 2](https://m.media-amazon.com/images/I/91Gdcs2cKkL.jpg) ![Sika Black Jack 903 Bitumen Trowel Mastic, Black, 5 Litre - Image 3](https://m.media-amazon.com/images/I/717psYjJQIL.jpg) ## Questions & Answers **Q: Can this be applied during rain or in damp conditions? i have previously used ikopro emergency repair but its now quite expensive. thank you.** A: Yes, in damp conditions , but any excess surface water should be removed before application. **Q: Is this product suitable for sealing leaking cast iron guttering.** A: can use but better to get bitumen flashing tape **Q: Do you need to heat the mastic before applying? Thanks Glennis** A: Worked for me without heating but would be better use it on a worm bay **Q: Is this mastic good for pooling on a garage roof?** A: Hi. There I used it to seal under the weather board on my up &over garage door a good while ago and up to now there has been no water lngress hope this helps ## Customer Reviews ### ⭐⭐⭐⭐⭐ Trowel applied mastic. *by on Reviewed in the United Kingdom 10 July 2025* Excellent product, replacing the felt on my garage roof the mastic worked better than the roof felt adhesive. ### ⭐⭐⭐⭐⭐ Great product *by on Reviewed in the United Kingdom 11 November 2025* Great product really good coverage and fast delivery ### ⭐⭐⭐⭐ Good value *by on Reviewed in the United Kingdom 11 April 2024* Not used it yet. But, I'm sure it'll do the job. Good value, arrived quickly. Only one criticism. Maybe stronger packaging required (or more careful courier). Pretty heavy, the bottom of the tin is bulging out from a drop. Fortunately, it's not split, so it doesn't really matter, but could have been messy. ## Frequently Bought Together - Everbuild Black Jack 903 Bitumen Trowel Mastic | Heavily Filled, Fibre Reinforced and Trowellable Bituminous Compound - Black - 5 Litre - Faithfull Tar Brush Short Handle FAIBRTARSH - Everbuild Black Jack 901 Bitumen Paint – Solvent Based – Black – 5 Litre --- ## 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.us/products/50087866-sika-black-jack-903-bitumen-trowel-mastic-black-5-litre](https://www.desertcart.us/products/50087866-sika-black-jack-903-bitumen-trowel-mastic-black-5-litre) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-08-29*