EWI-303 Gel Primer is a non-drip, deep-penetrating primer designed to improve adhesion and help create a more controlled, reliable surface before applying follow-on products. Its gel consistency helps minimise drips and splashes during application, making it a cleaner and easier option to work with on-site. Quick-drying and ready to use, it helps keep jobs moving efficiently while preparing the surface for paints, plasters, basecoats, tile adhesives and other decorative finishes.

Suitable for a wide range of mineral backgrounds, including concrete, masonry, bricks, ceramic blocks, cement-lime plasters, gypsum plasters, plasterboard, screeds and aerated concrete, EWI-303 Gel Primer is a versatile choice where strong adhesion and controlled absorbency are important. It dries colourless, making it a practical option for projects where you want dependable surface preparation without affecting the final appearance.

Why Choose EWI-303 Gel Primer?

• Non-drip gel formula helps reduce mess during application.
• Deep-penetrating primer designed to improve adhesion for follow-on coats.
• Helps control absorbency across a wide range of substrates.
• Quick-drying to help keep site workflows moving.
• Suitable before paints, plasters, fillers, basecoats, tile adhesives and decorative finishes.
• Ready to use with no dilution required.
• Dries colourless, helping keep the final finish true to appearance.

Intended Uses

EWI-303 Gel Primer is designed to prepare mineral substrates before the application of subsequent finishes and coatings. It is ideal where improved adhesion and controlled suction are needed prior to applying products such as dispersion paints, finishing coats, ceramic linings, wallpapers, plasters, screeds and tile adhesives. Its versatility makes it a useful addition for both refurbishment and new-build preparation work.

Substrate Preparation

Surfaces should be load-bearing, solid, dry and clean before priming. Dust, grease, oils, paint residues and other contaminants should be removed, while weak layers and surface defects should be made good before application. Any biological growth should be treated appropriately, and all repairs should be fully dry and sound prior to priming. Good preparation helps the primer perform properly and supports a stronger, more consistent finish.

Product Preparation

EWI-303 Gel Primer is supplied ready to use and should not be diluted with water or mixed with other materials. Simply stir thoroughly before use and apply within the recommended temperature range.

Application

Apply evenly by roller, brush or spray, taking care not to over-prime the surface. Under normal conditions, the primer allows a quick turnaround before overcoating, helping speed up progress on site. Indicative waiting times are around 15 minutes for tile adhesives, 30 minutes for masonry mortars, grouts and screeds, and 60 minutes for paints, with an overall drying time of approximately 2 hours at 20°C.

Application Conditions

Apply between 3°C and 35°C. During application and drying, protect the primed surface from frost, rain, high temperatures and strong winds to help ensure proper drying and performance.

Packaging & Storage

EWI-303 Gel Primer is supplied in a 5 litre jerry can. Store in unopened original packaging in dry conditions between 5°C and 25°C, protect from frost, and use within 24 months from manufacture when stored correctly.

Technical Data