IDENTIFICATION . Sikaflex®-291i bonds extremely well to the materials commonly used in marine construction like wood, metals, metal primers and paint coatings (2-C systems), ceramic materials and … It is a low-hazard product and contains no water or solvent. It can be painted after full curing, but is not suitable for joints with water pressure or permanent water immersion. Description: Sikaflex®-291 is a non-sag one- part polyurethane sealant specifi- cally developed for the marine market, which cures on exposure to atmospheric moisture to form a durable elastomer. Sikafl ex®-291i is a multi purpose one-component sealant and is used in the boat and ship building industry. Applications for Sikaflex 291i 300ml- Marine Sealant. The optimum temperature for substrate and sealant is between 15 °C and 25 °C. Abrading the substrate before using adhesives or sealants tends to improve their performance – especially when bonding to aluminium. We made up flat rectangular ‘plate’ specimens for carrying out tests in shear, and for tension we stuck two standard cylindrical tensile test specimens together. Do not use solvents on skin! Substrate: The surface material upon which the adhesive/sealant is applied to form a bond or joint. Bedding and sealing of fittings subject to minimal mechanical stresses. Options: £9.95 + VAT Quantity Add to Cart Email this product to a friend Description; Fast cure Marine adhesive / sealant and bedding compound. Non-structural adhesive is a lower strength for use where dismantling is required. PMMA, PC, etc. Sikaflex 291i. Sikaflex ®-291 1 / 3 Product Data Sheet Version 5/7/2010 Sikaflex®-291 Fast Cure Marine Adhesive and Sealant Technical Product Data (typical values) Chemical base 1-C polyurethane Color White, black, colonial white Cure mechanism Humidity-curing Density (uncured) 10.8 lb/gal depending on color VOC (EPA method 24) 0.43 lb/gal (51.5 g/l) Sikaflex®-291i bonds extremely well to the materials commonly used in marine construction like wood, metals, metal primers and paint coatings (2-C systems), ceramic materials and … Failure for the metals was adhesive, while the acrylic and glassfibre were 50/50 cohesive/adhesive. Hands and exposed skin have to be washed immediately using Sika® Cleaner-350H cleaning towels or a suitable industrial hand cleaner and water. Box Quantity 12. This performed consistently with all four materials, outperforming the UniBond Flextec but with a lower performance than the marine structural adhesives. Sikaflex®-291i kann nach der Hautbildung überlackiert werden. It stays flexible, allowing for structural movement: stress caused by shock, vibration, swelling or shrinking is effectively absorbed. Telefax : (201) 804 -1076 . Deck fittings, such as ventilators and cover strips, need to be waterproofed but are not subject to high tensile or torsion stresses. We decided to focus this test on non-wood products, concentrating upon sticking aluminium, steel, acrylic and glassfibre. To prime or not to prime? Sikaflex 291i Marine Adhesive Sealant - Black White Boat Yacht Sailing. There are a variety of adhesive products on the market, some designated specifically for the marine market and many more available from local DIY stores or builders’ merchants. This website uses cookies to provide you with a great user experience. PMMA, PC, etc.). Sikaflex®-291i bonds extremely well to the materials commonly used in marine construction like wood, metals, metal primers and paint coatings (2-C systems), ceramic materials and plastics (GRP, etc. Sikaflex® 291 is a marine grade adhesive and sealant that is ideal for all marine applications, above and below the waterline. It offers high initial grab and anti-vibration bonding and bedding properties. Adhesives, meanwhile, can be used to complement screw or bolt fastenings, or to carry the load without the need to penetrate the deck or coachroof with extra fixings. Sikaflex 291i . A similar visit to a national chain of builders’ merchants enabled me to source one product from the Bostik/Evo-Stik manufacturer and identify products from UniBond, but still failed to provide me with two other products from my shopping list. It is suitable for sticking a glassfibre deck to a glassfibre hull, wood to glassfibre, portholes and deck fittings, hull seams above and below the waterline, centreboard trunk joints between struts and planking, stern joints and deck housing. (en). The readings range from 30 to 95 points. It is suitable for making elastic, vibration-resistant joint seals, and can also be used for a variety of interior sealing applications. Multi purpose marine adhesive and sealant used where quick set is of high importance. Sikaflex 291i Black Multifunctional adhesive sealant for marine applications :The best marine sealant on the market. It should be noted that our ‘best on test’ awards have been selected purely by bond strength, as our test does not indicate a product’s resistance to water ingress. All the failures for the shear test were cohesive. Multifunctional adhesive sealant for marine applications, Sikaflex®-291i is a multipurpose product used in marine constructions. It is mould-resistant and sticks to most surfaces including wood, glass, metals, rigid PVC, glassfibre and foam polystyrene. Seawater. However, there was partial failure of the bond with the substrate for all our specimens. akrylglas, polykarbonat etc. The sealant performed about averagely for the non-structural adhesives. Perspex, polycarbonate, etc. Used by many boat builders, its fast cure time makes it ideal for applications where speed is - important. Sikaflex®-291i meets in addition the low spread of flame requirements set out by the International Maritime Organisation (IMO). ... BTK Sikaflex 291 White 300 ml Sealant Multi-Function Polyurethane Mastic … Sikaflex 291i has outstanding elasticity ensures a durable, long-lasting seal. Sika Services AG, Tüffenwies 16, CH-8048 Zürich, Switzerland declares under our sole responsibility that the product Sikaflex®-291i Which this declaration relates to is in conformity with the following standard(s) or other normative document(s) Annex A.1, item no. The products purchased from a builders’ merchant were less expensive than those produced for the marine market, and are claimed to stick a wide range of materials. The adhesive did better than the others with the glassfibre. Sikaflex Black 291i Multifunctional Adhesive sealant for Marine Applications, 300ml. Surface treatment depends on the specific nature of the substrates and is crucial for a long lasting bond. Your supplier should be able to provide you with the relevant data and safety sheets. Alex Bell and a PBO test team get stuck into a thorough trial of nine products to assess which adhesives and sealants bond best to aluminium, steel, acrylic and glassfibre. It is suitable for making elastic, vibration-resistant joint seals and for use in a variety of interior and exterior sealing applications. Sikaflex®-291i bonds extremely well to the materials commonly used in marine construction like wood, metals, metal primers and paint coatings (2-C systems), ceramic materials and plastics (GRP, etc.). Company name : Sika Corporation 201 Polito Avenue Lyndhurst, NJ 07071 USA www.sikausa.com . This is a universal polyurethane adhesive for marine sealing and non-structural bonding where a permanently elastic, vibration-damping seal is required: it can be used as an adhesive in limited stress applications. At low temperatures the water content of the air is generally lower and the curing reaction proceeds somewhat slower (see diagram 1). If you have read Richard Hare’s PBO articles on wood adhesives, you’ll know that two categories of adhesive are structural and non-structural: these tie in with Sikaflex’s strong and high-strength grades. Sikaflex®-291i is een specifiek voor de jacht- en scheepsbouw ontwikkelde 1-C polyurethaan afdichtkit met goed standvermogen, die door contact met vocht uit de atmosfeer uithardt. The choice of specialist marine adhesives alone is so great that chandlers don’t tend to carry the full range on their shelves. Sikaflex®-291i bonds extremely well to the materials commonly used in marine construction like wood, metals, metal primers and paint coatings (2-C systems), ceramic materials and plastics (GRP, etc.). The results showed a variable improvement in grip (see chart), with the aluminium showing the biggest gain from abrasion before application. Applications for Sika Sikaflex 291i 300ml- Marine Sealant. For the primed specimen, the adhesive stuck to the substrate and the adhesive failed, but at a lower level of stress. Consider that these suggestions are based on experience and have in any case to be verified by tests on original substrates. Deck fittings such as chain plates, winches and guide rollers must absorb very high dynamic stresses. træ, metaller, metalprimere og tokomponente malingsystemer, keramiske materialer og plast (GRP etc.). The structural adhesives were much stronger, but their performance was below that specified in their product data sheets. This product is suitable for experienced professional users only. Diagram 1: Curing speed for Sikaflex®-291i. This is a fast-cure (one-day), one-component polyurethane structural adhesive/sealant, suitable for above or below the waterline. How to install hatches and fittings on a boat? For example, Sika specify different adhesives for organic glass and mineral glass. The Shore A scale is used to test rubber-type compounds. Obtainable from builders’ merchants, this is a single-component, moisture-curing, modified silane (MS) polymer-based sealant. Its flexibility allows for the dissipation of stress caused by shock loading, vibration or shrinkage of the substrates. Tüffenwies 16 Plus top tips on servicing winches, choosing varnish, maintaining a swinging keel and more, This site is protected by reCAPTCHA and the Google, Seized outboard engine – how to bring a Mariner 2hp back to life, Check your mast and rigging from the deck. For this purpose, a high-performance product, Sikaflex®-292i, our assembly adhesive, should be used in conjunction with additional mechanical fixings. Cohesive failure: The adhesive/sealant fails before the adhesive releases from the substrate – this usually gives a higher strength value than through adhesive failure. On boats, we use adhesives and sealants. RRP per 300ml: £12.70; Buy now from Amazon; This was developed as an all-purpose flexible marine sealant that will bond with all the standard materials used in boat construction. ). Sikaflex 291i Sika Marine Sealant & Adhesive. Check pre-treatment chart for surface preparation of substrates prior to application and follow application steps according to application guidelines. Erfordert der Lack einen Einbrennprozess (über 80 °C), erzielt man das beste Ergebnis, wenn der Dichtstoff zuvor vollständig ausgehärtet ist. Aquaseal recommend a similar product called Marine Primer No 20, sold in 500ml tins, for plastic, metals and other non-porous substrates. With a slight change to the curing system (The icure system) Sikaflex 291 - Marine Grade Sealant is renamed Sika 291i. Sika Sikaflex 291i is one of the market leading Sealants & Adhesives for use in the Marine Industry, and boat building, perfect for a wide number of applications. Tooling and finishing must be carried out within the skin time of the sealant. This is a one-component, elastic, humidity-curing, MS polymer-based structural adhesive with extended skin time. This is because the manufacturers test just the adhesive itself; hence the failure is always cohesive. PRODUCT BENEFITS Wheelmark approved 1-component formulation However, times have changed and so have adhesives. A visit to my local chandlery revealed only two products in stock on my shopping list of six marine products from three manufacturers (Sika, Aquaseal and 3M), but I did find another product, by Saba, that I’d never heard of. £12.07 + P&P . It has low odour and cures to form a hard elastic rubber, with almost no shrinkage. All purpose flexible marine sealant. Test with actual substrates and conditions have to be performed to ensure adhesion and material compatibility. 3M recommend Scotch Weld Structural Adhesive Primer EC-1945 B/A. These fittings can be effectively bedded and sealed with only Sikaflex®-291i or if the joint remains visible and is exposed to weathering, then use Sikaflex®-591 or Sikaflex®-295 UV. This was the weakest on test. 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