Ronafix Pre-packed Render / Screed is a pre-packed mortar supplied complete with dry powders and a bottle of polymer gauging liquid. Will provide a weatherproof mortar. Both are bonded with Ronacrete Standard Primer.

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• Features & Benefits
• Preparation
• Damping
• Priming
• Mixing
• Placing
• Curing
• Working Temperatures

Features & Benefits

• Waterproof and frostproof
• High compressive, tensils, and flexural strength
• Pre-packed for increased confidence
• Can be laid from 6mm
• Trafficable after 24 hours

Preparation

The substrate on which the Ronafix Pre-packed Render / Screed is being placed must be structurally sound, stable and suitable to receive and support a strong render / screed. Surfaces should ideally be prepared by water/grit blasting or similar means to expose aggregate and provide a mechanical key. All grease, oil, dirt and deleterious material must be removed.

Damping

The prepared surface must be thoroughly dampened with clean water. All surplus and standing water must be removed before the primer is applied.

Priming

Mix Ronacrete Standard Primer with a slow speed drill and spiral paddle attachment and apply evenly to the damp surface, ensuring full coverage, immediately before applying the mixed Ronafix Pre-packed Render / Screed. Only prime an area which can be covered by the render or screed within the open time of the primer.

Note that the primer must not be allowed to dry. If it dries it must be thoroughly cross hatch scratched and reapplied.

Mixing

Ronafix Pre-packed Render / Screed provides optimum performance when machine mixed in a forced action mixer (eg. paddle or Creteangle pan mixer). Mix the dry components and when evenly dispersed add the required amount of the supplied gauging liquid, to provide sufficient workability for compaction and surface finish.

Placing

As soon as the material is mixed it must be applied to the wet/tacky primer, using conventional plastering techniques, ensuring total contact with the substrate and ensuring the render does not slump or slide away from the surface.

If applying two or more coats of Ronafix Pre-packed Render / Screed, each intermediate layer must be combed to provide a key for the next layer. The following layer should be applied, having first applied Ronacrete Standard Primer, after the previous layer has firmed up sufficiently to support its weight without slumping or pulling away. Keying and priming between layers is necessary to ensure total adhesion through the render.

Curing

As soon as possible after finishing the surface cure the surface with Ronacrete Curing Membrane. Alternatively use tight fitting polythene to prevent rapid moisture loss and surface cracking and crazing.

Working Temperatures

Ronafix Pre-packed Render / Screed may be used in most weather conditions and in a wide temperature range, typically from 3℃ to 25℃ and above.

Note that at high ambient temperatures the working time of the mix will be reduced; it will be increased at lower temperatures. Ideally materials should be between 10℃ and 20℃ before use.