Step 5: Apply mixed Bondall Silasec cement paint to the surface with a large paintbrush or broom, working it well into the surface. Step 3: Saturate the surface with water. Surface must be soaked but not running wet before applying mix. Stay up to date with the latest Datasheet and MSDS information. In the presence of water these swell and block the capillaries and pores in the applied sand/cement renders, screeds and mortar to provide an effective barrier against the transmission of liquid water. Suggested render mix is 2 or 3 parts clean, sharp sand to 1 part Portland type A or type GP cement mixed to a workable consistency using a dilution of 1 part Bondall Silasec to 5 parts water. * Do not use lime in this render as lime absorbs water and negates some of the waterproofing characteristics. 7 Brilliant Tile Combinations to Revamp Your Bathroom, How to Make Timber the Star of your Kitchen Reno. Dehydracrete Waterproofing Render is supplied in dry form along with a 2.5 ltr bottle of wet mix, packaged in a 20 ltr plastic drum, ready for on site mixing with fresh clean water to … When you render a property, you add layers of a substance called render to the property’s external walls. IV. For more information, Contact one of our staff. … I've used waterproofing additives that mainly have PVA in them. A typical mix to produce a water resistant mortar or render would be sand:cement 4:1 using SBR Bonding Agent diluted 1:3 with water as the gauging water Application – Bonding Agent For bonding render or plaster use SBR Diluted with water 1:3 or 4. Mix the Thoroseal with water at a ratio of 6 to 8 quarts of water for a 50-lb. When dry coat the surface with Make your waterproof cement yourself. Pot life of this mix is approximately 30 minutes. Repeated wetting may be necessary to maintain a saturated surface. The Bonding coat should not be allowed to dry before application of the render or plaster. Step 5: During warm weather, it is advisable to lightly wet the treated surface 4 to 8 hours after paint application to assist in achieving the correct set. To get around this problem, mix a mortar dye and a waterproofer in with the final top coat mix. Very easy to use, and once cured used additional waterproof sealer to complete the job. - Prime the surface with 1 part Bostik PVA to 5 parts water. Hopefully most of the moisture will be out by the weekend. Step 2: If surface is leaking or weeping water, refer to specification “Sealing Weeping Surfaces Prior to Cement Rendering“. At home, factory or on the job, now you can make your own through and through waterproof and water repellent concrete grout or masonry cement. (some assumptions have been made for the purposes of the calculation). Which also provides more elasticity during the drying process. Step 4: Mix 1 part by volume of Bondall Silasec with 5 parts water and stir well. That white waterproof woodworking glue is probably the same but dearer than the industrial quantity of concrete additive. Sika®-1 Waterproofer is an aqueous solution containing complex colloidal silicates. Step 1: Prepare the surface as per surface preparation (here). Waterproofs cement mortars and increases overall strength of the mix Add to mortar mixes to plasticise and protect against wet and damp Coverage: 250-500ml per 25KG Cement bag I used acrylic render, but the same could be done using tile grout, or cement render. Suggested render mix is 2 or 3 parts clean, sharp sand to 1 part Portland type A or type GP cement mixed to a workable consistency using a dilution of 1 part Bondall Silasec to 5 parts water. September 9, 2015 |. Render is traditionally a mixture of sand, cement, and other aggregates. Download our product guide to view the entire range. More Info. 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