Everbuild Opti-Mix Concentrated Render Additive 1L

Everbuild® Opti-Mix® 3-in-1 Render Additive – 1 L

Super-concentrated multi-functional admixture that acts as a waterproofing additive, air-entraining plasticiser and open-time extender in one. Ideal for achieving smooth, workable renders with enhanced durability and extended working time.

Key benefits

• Highly concentrated—1 L delivers the performance of approximately 25 L of conventional render additives.
• Triple-action formula provides waterproofing, plasticising and extended open time, eliminating the need for multiple separate additives.
• Creates stable air bubbles for “buttery” render consistency, improving workability.
• Helps prevent shrinkage, cracking, crazing and minor frost damage during curing, with long-term resistance to freeze/thaw cycling.
• Includes pore-blocking additives to reduce water absorption and minimize efflorescence.

Typical applications

• Pool and tank linings
• Mortars and screeds
• External renders
• External pointing
• Structures below ground level

Usage guidelines

• Recommended dosage: 20–40 ml per 50 kg of cement.
• Use the gauged bottle for accurate measuring—squeeze to draw up the dose into the measuring cap.
• Add the product to gauging water before mixing with dry ingredients—do not add directly to the dry mix.
• Cover large areas in one go thanks to the extended open time.

Product details

• Size: 1 L plastic gauged bottle.
• Appearance: Semi-viscous yellow liquid.
• Standard compliance: BS EN 934-3 certified.
• Storage: Keep between +5 °C and +40 °C; shelf life approximately 12 months from manufacture.

Good to know

Shake the bottle well before use. Always conduct a trial batch to verify performance under your site-specific conditions. Do not exceed recommended dosage and avoid overmixing to maintain effectiveness and quality.