BOSCOLASTIC - Bostik Hong Kong Limited

technical data sheetBOSCOLASTICTwo-Component Highly FlexibleCementitious Waterproofing CoatingDESCRIPTIONBoscolastic is a 2-component flexible acrylic polymercementitious waterproofing coating that is mixed on siteand resurfaced on concrete and other constructionmaterials to waterproof. Boscolastic has excellentweathering resistance and crack bridging property.USES• Concrete Water Tanks• Bathrooms, Balconies, Terraces• Swimming Pools and Pool Decks• Water Features and Ponds• Planter Boxes, CanopiesFEATURES• Flexible and elastic, can bridge over cracks• Accommodates flexible movements in suspendedstructures• No primer required• Can be tiled over successfully• Able to withstand heavy topping without fracture• Can be applied to damp substrates• Can be painted over with elastic paintTYPICAL PROPERTIESFormBinderGrey PowerWhite Milky LiquidCementShore A HardnessResistance to WaterPenetrationDIN1048: Part 5Water VapourTransmission ASTME96-00Pot Life 20 o C (mixed)Set to Touch 20 o CFinal Set 20 o C>70No penetration @ 0.2kgf/cm 2 for 6 hours12 g/m 2 /day45 mins to 1 hourWithin 2 hours4 – 6 hoursAPPLICATION INSTRUCTIONSSURFACE PREPARATIONAll substrates shall be sound and free from dust, excessmortar, oil or other loose particles. Cracks or honeycombsshall be repaired using suitable cement mortar.DAMPENAll concrete and cement substrates shall be saturatedwith clean water before applying Boscolastic waterproofcoating. No freestanding water is present duringapplication.MIXINGEmpty liquid component in a clean mixing container, andslowly add the Power component whilst stirring using aslow speed (500-600 rpm) heavy-duty electric drill with asuitable paddle. Minimal amount of water may be addedto ease application only when necessary. Small amountsmay be hand-mixed separately.ExtenderResinSelected fine silicaAcrylic PolymerMix until homogeneous slurry is obtained and make surethat no unmixed power is left at the bottom of thecontainer.Adhesion to concrete >0.6 N/mm 2Tensile Strength –ASTM D412-92Elongation at BreakASTM D412-92Crack Bridging>2 N/mm 2>250%>2mmPLACINGThe mixed Boscolastic can be applied onto the preparedsubstrate using a bristle brush or block brush.The application of Boscolastic can be done in one or twocoats depending on the manufacturer’s specification.When more than one coat is necessary to achieve thedesired thickness, apply the subsequent coats after 1-2BOSCOLASTIC PAGE 1 of 2.

hours curing of the previous coat.Allow at least 18 hours curing of the finished coat (subjectto touch dry) before laying screed or tiling. Water test canbe ducted after the same duration.It is recommended to keep each coat at a wet filmthickness of 1 mm and no more than 1.5 mm.CURINGThe finished Boscolastic waterproofing must be protectedfrom rapid drying. Curing of Boscolastic shall be at least24 hours before trafficking, to yield optimum strength.CLEAN-UPAll tools, equipments and surrounding areas can becleaned with clean water before the products sets.Hardened material has to be mechanically removed.PACKAGINGBoscolastic is packed in 35 kg set.COVERAGEApprox. 17m 2 /35 kg at 2 coats coverage, subjected tosubstrate condition and wastages.STORAGEBoscolastic has a shelf life of at least 12 months. Store allmaterials in a cool dry place, in an elevated condition.PRECAUTION• Never apply more than 4 kg/m 2 of Boscolastic inone single layer.• Never apply onto substrates with bitumen andpolyurethane coating finishes.• Apply only to clean, sound substrates – surfacesshould be well dampened but free of surface waterand leaks.• Boscolastic is not a decorative treatment. This doesnot affect the quality of the coating in any way.Where a decorative finish is required, overpaintBoscolastic with any approved protective anddecorative coatings.• Never exposed finished Boscolastic under directsunlight.Disclaimer: The information detailed in this data sheet is liable tomodification from time to time in the light of experience and normalproduct application, and therefore customers are advised to check withBostik Holding Hong Kong Limited, quoting the reference number thatthey possess the latest issue. The representations and recommendationsregarding the products are based on tests which we believe to be reliable.However, no guarantee of their accuracy can be made because of thegreat range of field conditions and variations encountered in raw materials,manufacturing equipment and methods. Thus, the products are sold witha limited warranty only, and on the condition that purchasers will maketheir own tests to determine the suitability of the product for their particularpurposes. Under no circumstances will Bostik Holding Hong Kong Limitedbe liable to anyone except for replacement of the products or refund of thepurchase price.HEALTH AND SAFETYSuitable protection clothing, dust masks, gloves and eyeprotection should be worn. Continual or extended contactwith cement products can cause skin irritation. If skinirritation occurs, flush skin with water for a minimum of 15minutes. If irritation still persists, consult medical advices.Bostik Holding Hong Kong Limited6/F Victoria Centre15 Watson RoadHong KongTel: (852) 2807 9400Fax: (852) 2510 8380JAN/07/ABOSCOLASTIC PAGE 2 of 2.