EWI Pro Performance Basecoat (EWI-222P) – 25kg

The EWI-222P Performance Basecoat is a polymer-rich, cementitious basecoat designed for both render only projects and for fixing EPS insulation boards. Breathable and water repellent, it provides a strong, flexible, and durable foundation for external wall insulation systems. For the best results, always finish with a Silicone Render for a long lasting, decorative finish.

Why choose EWI-222P?

• Dual Purpose - works as both an adhesive (for EPS) and a basecoat.
• Breathable yet water repellent for superior durability.
• Suitable for spray or manual applications.
• Designed for render only and EPS insulation projects.
• UK approved formulation with excellent adhesion and compressive strength.

Recommended Uses:

• As a basecoat for render only systems.
• As an adhesive for EPS insulation boards.
• Not suitable for other insulation types.

Application Overview:

• Substrate must be clean, dry and primed (e.g. with EWI-310)
• Mix with 4.5-5 litres of clean water per 25kg bag.
• Apply in two passes with reinforcing fibreglass mesh embedded in the first layer.
• Total thickness: 6mm (insulated substrate) or 10mm (masonry substrate).
• Protect freshly applied surfaces from frost, rain, strong sun and wind for 24 hours.

Technical Specifications:

• Composition - Portland cement, hydrated lime, polymers, admixtures.
• Bulk Density - 1690 kg/m³
• Capillary Water Absorption - W2
• Reaction to Fire - F
• Water Vapour Permeability: μ ≤ 15/35
• Compressive Strength: CS IV
• Thermal Conductivity: 0.61 W/mK
• Adhesion: ≥ 1.0 N/mm² (FP) B

Safety and Storage:

• Contains Portland Cement and Hydrated Lime.
• Wear protective gloves, goggles, mask, and clothing during use.
• Avoid skin and eye contact. In case of contact, rinse with water and seek medical advice.
• Store unopened in a dry place above 5°C. Shelf life: 12 months.

Coverage:

• 25kg bag covers approx. 1m² at 15mm thickness (excluding wastage).

FAQs

What is the difference between 222P and 225?

The main difference between EWI-222P and EWI-225 is that Performance Basecoat is only suitable for render-only applications and fixing EPS boards to substrates. Alternatively, Premium Basecoat is suitable for all applications, including render-only and external wall insulation projects.

Can 222P be applied using a spray machine?

Yes, Performance Basecoat can be applied using a spray machine (Tested with the Euromair DropPro 8P and Mixpro 28) or by hand using a trowel.

Can I use 222P as an adhesive?

You can use Performance Basecoat as a base for reinforcement layers on render-only projects and different insulation materials, including EPS.

How much water do I need to mix with 222P?

Using a suitable paddle or pan mixer, you should mix approximately 4.5-5 litres of water per 25kg bag of 222P. Mix the product for 2 minutes, allow it to stand for 2 mins, and then re-mix. This process allows the additives to dissolve and activate. Performance Basecoat may stiffen on standing. Re-mix the product to regain a workable consistency – but do not add more water.

What should the total thickness of 222P be?

The total thickness of the performance basecoat should be 6mm (insulated substrate) or 10mm (masonry substrate).