The Crommelin Powerflex 15L is a high‑performance rubber polymer cement additive, primer and adhesion promoter designed to strengthen and protect cementitious surfaces before applying coatings or mortars. Ideal for enhancing the durability, adhesion and moisture resistance of concrete, renders, screeds and mortars, Powerflex improves workability and delivers superior performance for trade and DIY projects.

Key Features

• Rubber polymer cement additive that increases strength and performance of mixes.

• Acts as a primer and adhesion promoter on porous and difficult substrates.

• Improves durability, water resistance and mechanical strength of concrete, renders and mortars.

• Enhances workability and reduces water/cement ratio for better mix properties.

• Increases tensile, flexural, impact and compressive strengths of cementitious coatings.

• Low VOC, non‑toxic and environmentally safer for indoor or outdoor use.

• Suitable for thin coat application, saving time and material.

Recommended Uses

• Primer for waterproofing membranes and surface coatings.

• Patching compounds and repair mortars.

• Renders, granolithic coatings and mortar beds.

• Underlayment levelling screeds and tile bedding applications.

The Crommelin Powerflex 15L enhances substrate preparation and improves performance of cementitious mixes for stronger, longer‑lasting results on both interior and exterior surfaces, making it a versatile product for professionals and DIYers alike.

Important: Application Instructions and Installation Guide