Sika Mix Frost Proofer & Plasticiser 5L

Sika Frostproofer and Mortar Plasticiser 5L is a chloride-free, air-entraining liquid admixture for mortar and concrete, engineered to keep cold-weather construction on schedule. Trusted by UK bricklayers, groundworkers, and renderers, it combines frost protection, plasticising, and acceleration in a single product — eliminating the need for a separate frostproofer. Certified to BS EN 934-3:2009, it is suitable for both trade and DIY use.

Key Features and Specifications

• Frost protection: Provides freeze/thaw resistance down to -8 °C in both wet and dry mortar
• Chloride-free formula: Non-corrosive to embedded metal — safe for use with brick ties and steel reinforcement
• Air-entraining plasticiser: Improves workability and trowelability even in cold weather
• Accelerating admixture: Speeds up setting times, enabling faster finishing in sub-zero conditions
• Replaces lime: Reduces the risk of lime bloom and efflorescence
• Reduces shrinkage, cracking, and bleeding/segregation in the mix
• Dosage: 1.25 L per 25 kg cement (down to -4 °C); 2.5 L per 25 kg cement (below -8 °C)
• Volume: 5 litres
• Standard: BS EN 934-3:2009 — Air entraining/plasticising mixture
• Shelf life: 24 months from manufacture date (stored in original, sealed container)
• Storage: +5 °C to +25 °C; will reconstitute after freezing

Applications

• Bricklaying and block laying mortar in cold or freezing conditions
• Pointing and repointing brickwork
• Internal and external cement-based rendering
• Load-bearing brickwork and masonry
• Floor screeds requiring frost protection during curing

Why Choose This Product

The Sika Frostproofer and Mortar Plasticiser 5L is a proven, all-in-one winter admixture from one of the world’s leading construction chemical brands. Its chloride-free, non-corrosive formula is safe alongside embedded metal, and its BS EN 934-3:2009 certification gives trade buyers the compliance confidence they need. By replacing lime in the mix, it simplifies batching and cuts the risk of unsightly efflorescence — a practical advantage on any site. The 5 L container suits small to medium projects, while the product is also available in larger trade volumes.

Delivery in and Around London

We deliver the Sika Frostproofer and Mortar Plasticiser 5L to all London boroughs, including Croydon, Lewisham, Southwark, Camden, and Hackney, as well as Greater London areas such as Enfield, Bexley, Redbridge, and Barnet. We also supply to the surrounding counties of Kent, Essex, Surrey, and Hertfordshire. Trade quantities are welcome — contact us for volume pricing and scheduled site deliveries.