Tuff Key 1L

KEYCOAT® is an acrylic latex cement additive designed to increase water resistance, flexural, and adhesion strengths of cement-based powders like tile adhesives, screeds, and cement plasters. TUFF KEYCOAT ® is particularly recommended for the surface preparation of difficult-to-tile substrates or for heavy-duty tiling applications which require exceptional adhesion and compressive strengths. MIXING INSTRUCTIONS 1. KEYCOAT® is ready to use product and it must not be diluted with water or any other substance 2. When being used as a primer for substrate preparation - TUFF KEYCOAT® must be mixed with TUFF BASECOAT® in the ratio of one part TUFF KEYCOAT® to two parts EZEE TILE BASECOAT®. Apply as per the instruction on the EZEE TILE BASECOAT® bag. 3. As an additive to waterproof plasters, mortars, and concrete - replace 9 Lt of water in the mix with 9 L KEYCOAT® to 50 Kg cement. 4. For high strength or hydrostatic pressure in plasters, mortars, and concrete - replace 18 Lt of water in the mix with 18 L of TUFF KEYCOAT® to 50 Kg Cement. SURFACE PREPARATION (These recommendations are in accordance with the SABS standard SANS 10107:2011 - The design and installation of ceramic tiles.) 1. For tiling onto smooth surfaces such as off shutter concrete and existing ceramic tiles. The surface must be acid washed to remove laitance and rinsed thoroughly in cold clean water. Once dry, the surface must be primed with a mixture consisting of two parts EZEE TILE BASECOAT ® mixed with one part TUFF KEYCOAT® and allowed to dry prior to tiling. 2. Painted surfaces, gypsum plasters, and surfaces that have old bitumen adhesive on them must be chipped in order to expose at least 80% of the substrate. The surface must then be primed with a mixture consisting of two
parts EZEE TILE BASECOAT ® mixed with one part TUFF KEYCOAT ® and allowed to dry prior to tiling. 3. Wooden surfaces must be sanded down in order to remove any polish or sealers that might be present and then cleaned. The surface must be primed with a mixture consisting of two parts EZEE TILE BASECOAT ® mixed with one part TUFF KEY COAT® and allowed to dry prior to tiling. 4. Highly porous substrates can negatively affect the bond strength of the tile adhesive. Check the porosity of the substrate by applying a small quantity of water. If the moisture is completely absorbed within one minute, then the surface is too porous and will need to be sealed with a mixture of two parts EZEE TILE BASECOAT ® mixed with one part TUFF KEYCOAT ® and allowed to dry prior to tiling. APPLICATION Apply all the above primers with a builders block brush taking care to create a uniform coating of at least 2 mm thickness. The coating should be completely dry before applying any form of adhesive, screed, or plaster. When being used as waterproof basecoat care must be taken to ensure the surface is coated 100% so that the water cannot penetrate at a later stage. PRECAUTIONS 1. Ensure that the above instructions are adhered to at all times and do not adulterate the product in any way as this could result in failure. 2. Rubber gloves should be used when applying TUFF KEYCOAT ®. In the event of irritation, rinse skin under cold water. Consult a doctor if irritation persists. 3. Keep TUFF KEYCOAT® away from pets and children. 4. Do not ingest and do not empty surplus down drains.