--- product_id: 50087866 title: "Sika Black Jack 903 Bitumen Trowel Mastic, Black, 5 Litre" price: "S$145" currency: SGD in_stock: true reviews_count: 9 url: https://www.desertcart.sg/products/50087866-sika-black-jack-903-bitumen-trowel-mastic-black-5-litre store_origin: SG region: Singapore --- # Flexible long-lasting black bitumen Fast drying in 24 hours Versatile multi-surface adhesion Sika Black Jack 903 Bitumen Trowel Mastic, Black, 5 Litre **Price:** S$145 **Availability:** ✅ In Stock ## Summary > 🖤 Seal it fast, seal it smart — the ultimate bitumen fix for pros who don’t wait. ## Quick Answers - **What is this?** Sika Black Jack 903 Bitumen Trowel Mastic, Black, 5 Litre - **How much does it cost?** S$145 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/50087866-sika-black-jack-903-bitumen-trowel-mastic-black-5-litre) ## Best For - Customers looking for quality international products ## Why This Product - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Rapid Seal Mastery:** Dries to a tough, waterproof skin in just 24 hours—get your project moving faster. - • **Ready-to-Use Power:** No mixing or thinning needed—apply straight from the tin with your steel trowel or putty knife. - • **Size Your Job Right:** Available in 1L, 2.5L, and 5L tins to match any scale of repair or maintenance. - • **All-Terrain Adhesion:** Seals and fills holes on asphalt, metal, concrete, timber, and more—one product, endless fixes. - • **Flex-Guard Technology:** Stays flexible after application to withstand moderate movement without cracking. ## Overview Sika Black Jack 903 Bitumen Trowel Mastic is a heavily-filled, fibre-reinforced black bitumen sealant designed for fast drying and flexible waterproofing. Suitable for a wide range of surfaces including roofing felt, metal, concrete, and timber, it offers durable adhesion and flexibility to accommodate moderate movement. Ready to use and available in multiple sizes, it’s the go-to solution for professional-grade sealing, filling, and bonding tasks. ## Description Free delivery and returns on all eligible orders. Shop Sika Black Jack 903 Bitumen Trowel Mastic, Black, 5 Litre | Heavily-Filled, Fibre Reinforced, Trowel Applied Bitumen. Review: Trowel applied mastic. - Excellent product, replacing the felt on my garage roof the mastic worked better than the roof felt adhesive. Review: Great product - Great product really good coverage and fast delivery ## Features - Causes damage to organs through prolonged or repeated exposure. - May cause drowsiness or dizziness. - Repeated exposure may cause skin dryness or cracking. - Toxic to aquatic life with long lasting effects. - 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 Required? | No | | Batteries included? | No | | Best Sellers Rank | 74,983 in DIY & Tools ( See Top 100 in DIY & Tools ) 50 in Roof Coatings & Paints | | Colour | Black | | Customer Reviews | 4.6 4.6 out of 5 stars (176) | | 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 Package Quantity | 1 | | Item Weight | 6.12 kg | | Item model number | 903 | | 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/61+VwRfR-kL.jpg) ![Sika Black Jack 903 Bitumen Trowel Mastic, Black, 5 Litre - Image 2](https://m.media-amazon.com/images/I/71NdTow+mwL.jpg) ![Sika Black Jack 903 Bitumen Trowel Mastic, Black, 5 Litre - Image 3](https://m.media-amazon.com/images/I/71Kt1wHuP3L.jpg) ![Sika Black Jack 903 Bitumen Trowel Mastic, Black, 5 Litre - Image 4](https://m.media-amazon.com/images/I/71bTnH35UGL.jpg) ![Sika Black Jack 903 Bitumen Trowel Mastic, Black, 5 Litre - Image 5](https://m.media-amazon.com/images/I/71P7CBeLMyL.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 A***Y on 10 July 2025* Excellent product, replacing the felt on my garage roof the mastic worked better than the roof felt adhesive. ### ⭐⭐⭐⭐⭐ Great product *by R***L on 11 November 2025* Great product really good coverage and fast delivery ### ⭐⭐⭐⭐ Good value *by K***2 on 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.sg/products/50087866-sika-black-jack-903-bitumen-trowel-mastic-black-5-litre](https://www.desertcart.sg/products/50087866-sika-black-jack-903-bitumen-trowel-mastic-black-5-litre) --- *Product available on Desertcart Singapore* *Store origin: SG* *Last updated: 2026-10-12*