sikaflex 291i vs 291

Sikaflex®-291i meets in addition the low spread of flame requirements set out by the International Maritime Organisation (IMO). On its website Sika lists seven products for marine applications: deck caulking, sealing compound, two grades of adhesive (strong and high-strength), direct glazing adhesive, spreadable adhesive for panels and sheets, and finally a sealing/bonding adhesive where flame retardation is required. Bonds extremely well to all the standard materials used in boat construction. It offers high initial grab and anti-vibration bonding and bedding properties. Sikaflex®-291i is a multipurpose product used in marine constructions. Suggestions for surface preparation may be found on the current edition of the appropriate Sika® Pre-Treatment Chart. By continuing to use this our site, you accept our use of cookies. It can be applied to wet or humid surfaces, has high UV and saltwater resistance, is virtually odourless and can be painted over. All paints have to be tested by carrying preliminary trials under manufacturing conditions. Obtainable from builders’ merchants, this is a single-component, moisture-curing, modified silane (MS) polymer-based sealant. New Year, New Boat? The sealant performed about averagely for the non-structural adhesives. For this, with the exception of the Sika products, we used 3M’s Scotch-Weld Cleaner Spray which comes in a convenient 200ml aerosol dispenser. 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. It is suitable for making elastic, vibration-resistant joint seals, and can also be used for a variety of interior sealing applications. (en), PDF - 256 KB It is graded for marine applications and will bond to full strength overnight. Additional discount is available on 291 70cc black & white box quantities of 12 Once cured, the material can only be removed mechanically. For the specimens in shear we placed a washer of 1.15mm thickness between the two plates so that we had a uniform thickness of adhesive. PRODUCT BENEFITS Wheelmark approved 1-component formulation London Boat Show – remember when January looked like this? Adhesive failure: The adhesive/sealant releases from the substrate. This is because the manufacturers test just the adhesive itself; hence the failure is always cohesive. 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. Cures to … The Shore A scale is used to test rubber-type compounds. However, it does show elasticity, suggesting that the Unibond Flextec FT101, Sikaflex-291i and 3M 4200FC all provide a bond which should put up with a fair amount of abuse while still being possible to release if required. The structural adhesives were much stronger, but their performance was below that specified in their product data sheets. £12.07 + P&P . At low temperatures the water content of the air is generally lower and the curing reaction proceeds somewhat slower (see diagram 1). Do not use solvents on skin! The amount of penetration gives a measure of the hardness. 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.). Aquaseal recommend a similar product called Marine Primer No 20, sold in 500ml tins, for plastic, metals and other non-porous substrates. Curing: The process of the adhesive/sealant solidifying. 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.). On boats, we use adhesives and sealants. Options: £9.95 + VAT Quantity Add to Cart Email this product to a friend Description; Fast cure Marine adhesive / sealant and bedding compound. It is claimed to bond damp surfaces and even to be useable under water! For example, Sika specify different adhesives for organic glass and mineral glass. Increasingly, adhesives are powerful enough to do the job by themselves: we have adhesives to hold our car windscreens in place, modern aircraft use adhesives extensively for body parts and even the latest lifeboats rely entirely on adhesives to bond the rubbing strip to the hull. Box Quantity 12. It will bond to a wide range of materials, has high elasticity, primerless adhesion, good UV, weather and ageing resistance and good ‘gunnability’ at low temperatures. For the Sika products we used their Sika Cleaner-205. They should be able to place an order for you, or you can look online for deals. On the shear test, the seal did not adhere to one face of the aluminium, steel or acrylic but bonded well to the glassfibre, and failed through shearing the sealant. Tear propagation resistance (CQP045-1 / ISO 34), Bonds well to a wide variety of marine substrates. The choice of specialist marine adhesives alone is so great that chandlers don’t tend to carry the full range on their shelves. Uncured Sikaflex®-291i can be removed from tools and equipment with Sika® Remover-208 or another suitable solvent. IDENTIFICATION . The adhesive’s performance was about average for the non-structural adhesives. Sikaflex 291i Black Multifunctional adhesive sealant for marine applications :The best marine sealant on the market. The aluminium and steel specimens failed through cohesive bonding, the acrylic and glassfibre through a combination of cohesive and adhesive failure. PMMA, PC, etc.). It has excellent shock-absorbing and vibration-damping properties, coupled with high elasticity and resistance to weathering, seawater and UV radiation. Sikaflex 291i Marine Sealant & Adhesive Black 300ml Cartridge Product Option: 408852 SKMFLEX291BK Barcode: 7612894815177 Product Breakdown: Sikaflex 291i Black is the perfect all-rounder Resistant to: Weathering. Telephone : (201) 933 -8800 . Winches, windlasses are subject to high mechanical stresses, fans, hatches and hatch covers to low stresses. It is suitable for making elastic, vibration-resistant joint seals and for use in a variety of interior and exterior sealing applications. The adhesive did better than the others with the glassfibre. Sikaflex®-291i må ikke bruges på plast med tilbøjelighed til dannelse af spændingsrevner (f.eks. It is a non-structural adhesive, ie light duty, one-component polyurethane, with high elasticity and resistance to weathering, seawater and UV radiation. Shear stress: The force is parallel to the area under load. It has a medium viscosity, a high modulus of elasticity and extended open time. Seawater. All specimens were tested on a Hounsfield (Monsanto) tensile testing machine in the materials laboratory at Southampton Solent University. This showed about average shear strength for a non-structural adhesive, with good adhesion to all the substrates except the steel, where there was 50% peel. Sikaflex®-291i can be processed with hand, pneumatic or electric driven piston guns. Sikaflex 291i is the perfect all rounder Sikaflex®-291 is a non-sag 1-C polyurethane sealant. Sikaflex®-291i Revision Date 07/05/2019 Print Date 07/05/2019 1 / 10 SECTION 1. Sikaflex®-291i can be processed between 10 °C and 40 °C but changes in reactivity and application properties have to be considered. Sikaflex - 291i White. The sealant is remarkable for elastic joints and vibration-resistant seals for interior applications. Failure for the metals was adhesive, while the acrylic and glassfibre were 50/50 cohesive/adhesive. Bedding and sealing of fittings subject to minimal mechanical stresses. ). Sikaflex®-291i is a non-sag 1-component polyurethane sealant specifically developed for the marine market, which cures on exposure to atmospheric moisture. It is suitable for making elastic, vibration-resistant joint seals, and can also be used for a variety of interior sealing applications. Sikaflex®-291i must not be used to seal plastics that are prone to stress cracking (e.g. CH-8048 Zürich It has high UV stability and is silicone-free, it can be painted over and sanded, has strong saltwater resistance and does not require a primer with most marine substrates. With a slight change to the curing system (The icure system) Sikaflex 291 - Marine Grade Sealant is renamed Sika 291i. Perspex, polycarbonate, etc. Sikaflex®-291i i har yderst god vedhæftning på de mest anvendte materialer i marinekonstruktioner som f.eks. This was one of the best products on test, with good adhesive properties with our materials. 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. For the primed specimen, the adhesive stuck to the substrate and the adhesive failed, but at a lower level of stress. It is recommended using Sika® Tooling Agent N. Other finishing agents must be tested for suitability and compatibility prior the use. When it comes to sticking two bits of anything together, I tend to be a belt-and-braces person – or should that be a nut, bolt and glue person? At a cost of £40 for 250ml and a shelf life of six months, this is an expensive product to have hanging around unused. Sikaflex 291i Marine Adhesive Sealant - Black White Boat Yacht Sailing. Product name : Sikaflex®-291i. When fully cured, it may be painted over with most types of paint. ... BTK Sikaflex 291 White 300 ml Sealant Multi-Function Polyurethane Mastic … This is a high-strength, marine-grade adhesive based on advanced hybrid MS polymer technology, specifically designed for structural and dynamically stressed bonding applications in the boatbuilding and maintenance industries. ). The results showed a variable improvement in grip (see chart), with the aluminium showing the biggest gain from abrasion before application. Once cured, the material can only be removed mechanically. 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. 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. Surfaces must be clean, dry and free from grease, oil and dust. Similarly, they often don’t stock primers as these have both a limited demand and a short shelf life. Sikaflex 291i has outstanding elasticity ensures a durable, long-lasting seal. This is a one-component, elastic, humidity-curing, MS polymer-based structural adhesive with extended skin time. 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) We also tested the glassfibre with Sika Primer 210T: this outperformed the non-primed glassfibre, and there was a complete bond with both surfaces. Shore A hardness: Hardness tests involve pushing an object, eg a steel ball, against the material’s surface with a specified force. Typically, these could be deck fittings such as cleats, winches, rope clutches, hatches and windows. 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 is a multipurpose product used in marine constructions. All purpose flexible marine sealant. 3M recommend Scotch Weld Structural Adhesive Primer EC-1945 B/A. It is mould-resistant and sticks to most surfaces including wood, glass, metals, rigid PVC, glassfibre and foam polystyrene. Sikaflex®-291 is manufactured in accordance with the ISO 9001/14001 quality assur- ance system. PMMA, PC, etc. If the paint requires a baking process (> 80 °C), best performance is achieved by allowing the sealant to fully cure first. Abrading the substrate before using adhesives or sealants tends to improve their performance – especially when bonding to aluminium. Sikaflex®-291i can be best painted after formation of a skin. Sikaflex 291 is a professional-grade adhesive used by boat builders to bond boat components structurally. However, times have changed and so have adhesives. Used by many boat builders, its fast cure time makes it ideal for applications where speed is - important. træ, metaller, metalprimere og tokomponente malingsystemer, keramiske materialer og plast (GRP etc.). Sikaflex®-291 is a 1-component, marine grade polyurethane elastomeric adhesive and sealant. Sikaflex®-291i must not be used to seal plastics that are prone to stress cracking (e.g. The Sikaflex brand will be familiar to most British practical boat owners. This will vary with the intended use, and is very much a case of horses for courses: you would be lucky to find a product that meets all needs. It is suitable for making elastic, vibration-resistant joint seals, and can also be used for a variety of interior sealing applications. This gave better-than-average performance for the glassfibre, acrylic and aluminium, but showed reduced adhesion to steel. For all the specimens, the only initial surface preparation we did was to clean the contact surfaces. The acrylic and GRP fared much better, with most of the structural adhesives failing in a cohesive mode. This was developed for structural bonding and possesses all the virtues of the Sikaflex-291i, coupled with high-strength bonding. The readings range from 30 to 95 points. Sikaflex 291i Marine Adhesive Sealant Bloody brilliant stuff for for water tight seals and sticking stuff on your kayak Description Sikaflex®-291 is a non-sag 1-C polyurethane sealant specifically developed for the marine market, which cures on exposure to atmospheric moisture to form a durable elastomer. It’s a good all-rounder though, and  is cheap and readily available. 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. SIKAFLEX 291i BLACK Sika 291 Marine Adhesive Sealant Handy Tube 70cc S291BK-70. Finally, we tested all our materials with one non-structural adhesive – Aquaseal mSEAL 295 – with all the contact surfaces abraded with 400-grit wet and dry paper before cleaning. Getting the right product for a specific application can be a problem as chandlers only stock the most popular sealants and adhesives and are sometimes unable to get hold of single cartridges. This performed consistently with all four materials, outperforming the UniBond Flextec but with a lower performance than the marine structural adhesives. Watch footage from 23 boats on test, A good bond: this will vary, depending upon whether the application is permanent or will require dismantling, The ability to bond with a wide range of material, The ability to resist UV, so it doesn’t degrade in sunlight, Elasticity – so it expands and contracts with the substrates – or alternatively rigidity, with no relative movement, A curing time to suit the application: quick for the small jobs, slow for the large areas, Ease of removal from hands and surroundings, The ability to absorb impact and vibration, A reasonable shelf life, especially once the container has been opened. 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. Sikaflex Black 291i Multifunctional Adhesive sealant for Marine Applications, 300ml. Sikaflex-291 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 Bostik/Evo-Stik product performed better than the UniBond but wasn’t as strong as the marine structural adhesives. It has excellent gap-filling capability and can be painted over and sanded, for use above or below the waterline. Uncured Sikaflex®-291i can be removed from tools and equipment with Sika® Remover-208 or another suitable solvent. 4.6 out of 5 stars 186. Its primary use is bonding: secondary use is sealing seams, overlaps and joints. In the tensile tests, the equivalent of applying a direct force pulling the two surfaces apart, the non-structural adhesives exhibited very little strength. 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. 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. Company name : Sika Corporation 201 Polito Avenue Lyndhurst, NJ 07071 USA www.sikausa.com . Product data sheets are available for each of the adhesives we tested: these varied in the amount of additional information they presented. Sikaflex®-291i voldoet bovendien aan de voorschriften voor lage vlamverspreiding van de … View Larger Image. The use of the Sika primer improved the strength of the Sikaflex-292i but weakened the Aquaseal mBOND 395 and the 3M 5200, so the lesson here is to use the product specified by the manufacturer. 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. However, for comparison purposes, we also tried one specimen in the shear test with no spacer, forcing the two surfaces together with finger pressure. For further details read our application guidelines and our pre-treatment chart. Ultra-violet radiation. Deck fittings such as chain plates, winches and guide rollers must absorb very high dynamic stresses. ). How to install hatches and fittings on a boat? This website uses cookies to provide you with a great user experience. The maximum force is divided by the original cross-sectional area that is subjected to the force, giving load per unit area. It can be used for interior and external applications. Having trouble putting your oilskins on over your boots? This is a popular builders’ merchant product, a one-part, moisture-curing polymer suitable for a wide range of elastic sealing and non-structural bonding operations. 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 metal specimens was the adhesive detaching from the substrate (adhesive failure), while the acrylic and GRP was a combination of cohesive and adhesive failure. The use of the spacer improved the strength of the bond. This performed overall second best on the shear test, with best results for the aluminium and acrylic, but gave the worst performance for the glassfibre compared to the other structural adhesives. akrylglas, polykarbonat etc. Failure in the shear test was cohesive, except with the steel where it was an adhesive failure. It is a low-hazard product and contains no water or solvent. Applications for Sikaflex 291i 300ml- Marine Sealant. Überlackierbarkeit. Painting could be improved by treating the joint surface with Sika® Aktivator-100 or Sika® Aktivator-205 prior to paint process. Hands and exposed skin have to be washed immediately using Sika® Cleaner-350H cleaning towels or a suitable industrial hand cleaner and water. A car tyre typically has a value of 70. (en). However, there was partial failure of the bond with the substrate for all our specimens. Check pre-treatment chart for surface preparation of substrates prior to application and follow application steps according to application guidelines. Test with actual substrates and conditions have to be performed to ensure adhesion and material compatibility. SOLAS 74 as Tube size 300ml. Hands and exposed skin have to be washed immediately using Sika® Cleaner-350H clean-ing towels or a suitable industrial hand clean-er and water. Additional discount is available on Sikaflex 291i 300cc & 400cc box quantities of 12 - further discount on 10 boxes and over. It forms a watertight, weather-resistant seal on joints and boat hardware above and below the waterline. A.1/3.18e and Annex B, Module B in the Directive. that are prone to stress cracking. Sikaflex® 291 is a marine grade adhesive and sealant that is ideal for all marine applications, above and below the waterline. Sikaflex®-291i meets in addition the low spread of flame requirements set out by the International Maritime Organisation (IMO). Surface abrasion also improved the bond between the adhesive and the substrate for all the specimens. Consider that these suggestions are based on experience and have in any case to be verified by tests on original substrates. This could lead to cracking of the paint in the joint area. Sikaflex 291i . E -mail address : ehs@sika -corp.com For the glassfibre shear specimens we tested the marine structural adhesives with and without Sika Primer-206 G+P, to see whether this application made any difference. Substrate: The surface material upon which the adhesive/sealant is applied to form a bond or joint. Get every issue of PBO on Android, iPhone, iPad or desktop, Bending on a furling genoa at the start of the season can be daunting, but…, Practical articles and expert tips galore in the February 2021 issue of PBO as we hear from a reader struck by lightning 3 times! Hunter Ranger 245 on test – a boat for our time? 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. Sikaflex 291i Sika Marine Sealant & Adhesive. Deck fittings, such as ventilators and cover strips, need to be waterproofed but are not subject to high tensile or torsion stresses. We also tested the shear specimens with mSEAL 295 after first abrading them with 400-grit wet and dry. Sikaflex®-291i is a multi-purpose adhesive/sealant used in marine on a wide variety of vessels. Sikaflex 291i. For the shear tests, most of the metal specimens failed, with the adhesive releasing from the substrate. Sikaflex®-291i is a non-sag 1-component poly-urethane sealant specifically developed for the marine market, which cures on exposure to atmospheric moisture. Sealants do not possess great bonding strength. Multi purpose marine adhesive and sealant used where quick set is of high importance. 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. 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.

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