Triple-Action Admixture: Waterproofs, Retards & Plasticises

Bostik Cementone Freeflo is a pigmented, thixotropic liquid admixture designed to improve the performance of cement-based mixes. Developed for rendering, pebble dashing, roughcast, and harling applications, it combines three essential functions in one: waterproofing, plasticising, and setting retardation.

Its extended working time allows larger areas to be rendered in one go, reducing waste and increasing efficiency. Freeflo also enhances workability through air entrainment and is chloride-free, making it suitable for above-ground applications where reinforcement corrosion is a concern.

Key Features & Benefits

• 3-in-1 Function: Waterproofs, retards, and plasticises cement:sand mixes
• Improved Workability: Air-entraining formula provides a smoother, more manageable mix
• Extended Open Time: Slows setting for larger jobs or warmer weather conditions
• Chloride-Free: Compatible with steel-reinforced render surfaces
• Ready to Dilute: Mixes easily with water and integrates into standard cement mixes

Typical Applications

• Pebble dashing backing coats
• Roughcast or harling render systems
• External cement render over brick or blockwork
• Above-ground waterproofing renders exposed to driving rain

Technical Specifications

• Form: Viscous liquid
• Colour: Orange
• Specific Gravity: ~1.02
• Mix Ratio: 1 part Freeflo to 30 parts water by volume
• Shelf Life: 15 months unopened
• Storage: Store between +5 °C and +25 °C in dry, frost-free conditions

Application Guidelines

1. Ensure surfaces are clean and free from grease, dirt, or loose particles
2. Pre-dilute Freeflo at a ratio of 1:30 with clean water
3. Add to the cement:sand mix during the gauging phase
4. Mix thoroughly and apply using standard rendering techniques

Comparison: Freeflo vs Other Cement Additives

Feature / Product	Bostik Freeflo	Integral Waterproofer	SBR Bonding Agent	Standard Plasticiser
Waterproofing Function	✔ Above ground	✔ Above ground	✘	✘
Retarder / Slows Set Time	✔ Yes	✘	✘	✘
Plasticising / Workability	✔ Yes	✔ Slight	✔ Excellent	✔ Yes
Air Entrainment	✔ Yes	✔ Yes	✘	✔ Yes
Chloride-Free	✔ Yes	✔ Yes	✔ Yes	Varies
Ideal For	Rendering, dashing, harling	General waterproof render & screed	Bonding over concrete & tanked walls	Bricklaying & mortar softening
Below Ground Use	✘ No	✘ No	✔ In systems	✘ No

Safety & Handling

• Classified as irritant—avoid skin and eye contact
• Use protective gloves and goggles
• In case of contact, rinse immediately with clean water
• Do not discharge into drains or watercourses

Bostik Freeflo is your all-in-one solution for exterior cement render jobs where water resistance, improved workability, and longer open time are essential. Ideal for pebble dashing and roughcast in changing site conditions.