PRODUCT DATA SHEET
CI/Sfb: Yt4 March 2011
BITUMEN MASTIC Thompson’s Bitumen Mastic is a non slumping bituminous mastic that is used for filling joints, cracks and splits in roofing and building materials including roofing felt, asphalt, concrete, asbestos cement and metallic guttering and drainpipes. It is resistant to water penetration immediately after application and is ideally suited for maintenance and remedial work.
THOMPSON’S BITUMEN MASTIC: • For filling joints, cracks and splits in roofing and building materials including roofing felt, asphalt, concrete and asbestos cement. • Joint sealing in gutters, spouts, down pipes, between corrugated asbestos cement and iron sheetings, around skylights and precast concrete units. • Ideal for bedding tiles, slates and flashings in to position. TECHNICAL DATA Form
Black solvent based mastic
Storage Life 12 Months unopened stored between 5°C and 25°C in original containers Flashpoint
38°C
Coverage Approx 0.5m² per litre at 2mm thick Application Temperature
+5°C to +40°C
Service Temperature
-10°C to + 75°C
SURFACE PREPARATION Ensure that the surface is clean, dry and free from oil, grease, dirt and organic growth. Organic growth such as moss and lichen can be removed using Thompson’s Mould & Mildew Cleaner. Bolt heads in roof sheets should be wire brushed to remove rust before being sealed with Thompson’s Bitumen Mastic. Porous surfaces should be primed with Thompson’s General Purpose Bitumen Primer in order to seal the surface and allowed to dry thoroughly. APPLICATION In order to assist application, tools can be lubricated with white spirit or paraffin. Apply Thompson’s Bitumen Mastic by trowel or putty knife, forcing material into cracks and joints and smoothing out on either side. Cracks or joints of more than 3mm should be reinforced with glass fibre scrim and covered with a second application of mastic. DRYING TIME Drying time depends on weather conditions and film thickness. Heavy applications will result in extended drying times.
Specification writers: These values are not intended for use in preparing specifications. Please contact your local Thompson’s Sales Representative prior to writing specifications on this product.
COVERAGE A typical coverage rate for 2mm thickness of material is 0.5m²/litre. CLEANING All tools should be cleaned immediately after use with white spirit. Hardened material can be removed by soaking in white spirit.
HEALTH AND SAFETY Thompson’s Bitumen Mastic contains bitumen and flammable solvents. Do not smoke and keep away from naked flames and other sources of ignition. Please refer to Health and Safety data sheets available on request. TECHNICAL SERVICE For further technical information, advice on suitability for specific applications, or detailed Health and Safety information, contact Thompson’s Technical Service. IMPORTANT NOTE The information contained herein is offered in good faith and is believed to be accurate. However, because conditions and methods of use of our products are beyond our control, this information should not be used in substitution for customer’s tests to ensure that Thompson’s products are safe, effective and fully satisfactory for the intended end use. Suggestions of use shall not be taken as inducements to infringe any patent. Thompson’s sole warranty is that the product will meet the Thompson’s sales specifications in effect at the time of shipment. Your exclusive remedy for breach of such warranty is limited to refund of purchase price or replacement of any product shown to be other than as warranted. Thompson’s specifically disclaims any other express or implied warranty of fitness for a particular purpose or merchantability. Thompson’s disclaims liability for any incidental or consequential damages.
PACKAGING Thompson’s Bitumen Mastic is available in 1 Litre, 2.5 Litre and 5 Litre tins.
Sherwin-Williams Diversified Brands Ltd has been registered to BS EN ISO 9000 1994 (Registered Firm No. FM 1669/1). Sherwin-Williams Diversified Brands Ltd. operate an Environmental Management System that complies with the requirements of BS 7750:1994, Certificate No. EMS 35924. Sherwin-Williams Diversified Brands Ltd. has achieved Investors in People certification, (certificate number 59586).
©Sherwin-Williams Diversified Brands Ltd, Thorncliffe Park, Chapeltown, Sheffield S35 2YP Tel: (0114) 240 9469 (Technical Services) (0114) 246 7171 (Main Switchboard) Fax: (0114) 245 5629 Email:
[email protected] Web: www.thompsonsweatherproofing.co.uk Thompsons is a Registered Trademark of the Sherwin-Williams Company. JANUARY, 2009 ISSUE 1
