PREPARATION

All cracks, voids, honeycombing and non-moving joints should first be repaired and filled with CEMIX QUICK PATCH mortar. All active leaks should first be plugged with CEMIX QUICK PLUG. Rain can damage CEMIX CRYSTAL PROOF, therefore it should not be applied if rain is forecast in the following 5 days after using. Freezing temperatures may also adversely affect the product and should be avoided for 3 days after application. Thoroughly clean the area to be coated so as to remove all loose and deleterious materials and debris, including all dust, dirt and oil. All surfaces should be roughened, uncoated, clean and have an open capillary structure. Concrete slabs and walls: Rough hone or acid wash the surface to open the capillaries then water blast thoroughly. Block walls: Block walls should be plastered first. A bonding splash coat using CEMIX CEMPLASTER should be applied to the wall with the addition of CEMIX MULITBOND diluted 1 to 1 with water. Next a 10mm thick layer of CEMIX CEMPLASTER should be applied. Do not add bonding agents to the plaster coat. Rough finish the plaster to enhance the CEMIX CRYSTAL PROOF bond to the plaster surface.

YIELD

• Vertical surfaces: Approximately 1.6kg per m²
• Horizontal surfaces: Approximately 1.5kg per m²
• Dry shaking: Approximately 1kg per m²

MIXING

Place approximately 250 – 300ml of clean fresh tap water per kg of CEMIX CRYSTAL PROOF in to a bucket or similar container. Next add the CEMIX CRYSTAL PROOF powder to the water while stirring constantly with a drill and paddle for 2 – 3 minutes, until a semi fluid, toothpaste like slurry is achieved. Add further CEMIX CRYSTAL PROOF if required. Start by mixing a small amount only as product will stiffen rapidly. Mix only as much material as can be applied in 15 – 20 minutes. In very hot weather consider using chilled mixing water. Keep remixing product during application process.

APPLICATION

All surfaces should be dampened with water just prior to product application. Apply the slurry paste generously using a stiff bristle brush at a thickness of 1 – 2mm. Apply a second coat shortly after, brushing at right angles to the first coat. CEMIX CRYSTAL PROOF may be applied by way of dry shaking to fresh concrete. Dry shake the powder through a sieve into the top of the screeded concrete slab just prior to initial set. Trowel finish the product into the surface.

CURING

It is important to cure CEMIX CRYSTAL PROOF thoroughly after it has set by keeping it moist and covered for at least 5 days. Avoid rain damage until the product has set and freezing conditions for at least 3 days.