Sika Ronacrete Ronafix
Sika Ronacrete Ronafix
Ronafix® is Sika Ronacrete's classic SBR mortar admixture, available since 1969. When added to cement mortar, it significantly improves waterproofing, bond strength and compressive strength, allows thin section application down to 6mm, and provides freeze/thaw resistance after curing. Suitable for internal and external use.
Ronafix Product Features
Ronafix® is a single part modified styrene butadiene (SBR) liquid additive for cement mortars which enhances physical and chemical properties. Mortars containing Ronafix can be applied in thin section (minimum 6mm), and once cured are waterproof and resistant to freeze/thaw cycling, with monolithic adhesion to building substrates. Ronafix is supplied as a milky white liquid and is diluted with water according to the specified mix design before adding to cement, sand and aggregate. As a priming or bonding coat, Ronafix is used with cement only to provide adhesion between substrate and mortar.
- Proven track record since 1969 — over 55 years of proven performance
- Mortars can be applied in thin section — minimum 6mm
- High compressive, tensile and flexural strengths
- Cured mortars are waterproof and resistant to freeze/thaw cycling
- Monolithic adhesion to building substrates
- Mortars, toppings and renders more resistant to mild chemical attack
- Low VOC
- Suitable for internal and external use
Applications
- Floor Screeds — Thin to thick section high-strength floor screed repairs and overlays
- Concrete Repair — Spalling and concrete patch repair
- Waterproof Renders — Bathroom, roof and basement waterproof plastering
- Slurry Coats — Levelling and protective slurry coats
- Heavy Duty Floor Toppings — Car parks, warehouses and high-traffic areas
- Steel Reinforcement Protection — Anti-corrosion primer and protective coating for rebar
- Bedding and Bonding Mortars — Enhanced tile and masonry adhesion
- Tanking and Waterproofing — Water tanks and basement waterproofing
- Spatterdash — Base coat to improve adhesion
- Bond Coats — Bonding primer between old and new concrete
- Steel Reinforcement Primer — Protection of exposed reinforcement
Why Choose Ronafix
| Product | Brand | Type | Features |
|---|---|---|---|
| Ronafix | Sika Ronacrete | SBR Modified | Classic 1969 formula, 55+ years proven, high compressive strength |
| SikaLatex | Sika | Synthetic Rubber Latex | Improves bond and reduces shrinkage |
| Nitobond SBR | Fosroc | SBR Latex | Industrial-grade mortar modifier, suitable for tiling |
| Planicrete Latex | Mapei | Synthetic Rubber Latex | Improves mechanical/adhesion/waterproofing properties |
Packaging
| Item | Specification |
|---|---|
| Pack Sizes | 5 litre drum, 30 litre drum or 220 litre drum |
| Appearance / Colour | Milky white liquid |
| Shelf Life | 9 months from date of production |
| Storage Conditions | +5°C to +30°C, protect from direct sunlight and frost |
Technical Data
| Property | Value |
|---|---|
| Compressive Strength (Mix A, 7 days) | 50.5 N/mm² |
| Compressive Strength (Mix A, 28 days) | 52.5 N/mm² |
| Shear Bond Strength (Mix A, 7 days) | 9.3 N/mm² |
| Shear Bond Strength (Mix A, 28 days) | 18.1 N/mm² |
| Dynamic Modulus (Mix A, 28 days) | 24.8 KN/mm² |
| Water Vapour Permeability Reduction (p/c 1:7) | 96.0% |
| Minimum Application Thickness | 6 mm |
Application Method
- As a Mortar Admixture — Mix Ronafix with water at the specified ratio, then add cement and sand to form mortar
- As a Primer / Bond Coat — Mix Ronafix with cement only (no sand) and brush onto the substrate to enhance mortar adhesion
- Mix Ratios — Varies by application, typically Ronafix:Water = 1:1 to 3:1. Refer to the product data sheet for details
Notes: Ambient and substrate temperatures must be above +5°C during application and curing. Store in undamaged, unopened original sealed packaging, protected from direct sunlight and frost. For detailed application guidance, refer to the product data sheet or contact us via WhatsApp.
FAQ
What is the difference between Ronafix and other SBR admixtures?
Ronafix is Ronacrete's premium SBR mortar admixture with a proven track record since 1969. Compared to generic SBR products, Ronafix delivers higher compressive and flexural strengths and has over 55 years of proven performance in construction projects worldwide.
Can Ronafix waterproof mortar?
Yes. Mortars modified with Ronafix are waterproof after curing and resistant to freeze/thaw cycling. According to the product data sheet, water vapour permeability can be reduced by up to 96%. Suitable for bathroom waterproof renders, rooftop waterproofing, basement tanking and more.
How do I use Ronafix? What are the mix ratios?
Mix Ronafix with water at the specified ratio (typically 1:1 to 3:1 depending on application), then add cement and sand. As a bond coat, mix Ronafix with cement only (no sand) and brush onto the substrate. Refer to the product data sheet for detailed mix designs or contact us via WhatsApp.
What pack sizes are available?
Ronafix is available in 5 litre, 30 litre and 220 litre drums. Contact us via WhatsApp for pricing and ordering details. We offer collection from our Mong Kok store and delivery across Hong Kong.
