RLA Polymers

RLA Porous Primer – Water-Based Primer for Porous Surfaces

$37.95 AUD
$37.95 AUD
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RLA Porous Primer is a fast-drying, water-based acrylic primer formulated to promote strong adhesion of RLA waterproof membranes, tile adhesives, and repair mortars over porous substrates. It provides a stable, sealed surface that improves membrane bond strength and prevents pinholes or premature drying.

Suitable for a wide range of substrates including concrete, render, screeds, fibre cement sheeting, and plasterboard, this primer is designed for both internal and external use. It is ready to use straight from the container and dries quickly, helping to reduce downtime on site.

Ideal for use before applying RLA waterproofing membranes or adhesive systems, RLA Porous Primer ensures reliable adhesion and surface preparation across new builds and remedial works.

• Fast drying and easy to apply
• Improves adhesion to porous substrates
• Water-based, low odour, and safe to use
• Compatible with RLA waterproofing membranes and adhesives
• Excellent coverage and penetration
• Suitable for internal and external use
• Can be applied by brush or roller
• Dries clear for easy inspection

• Primer for RLA waterproof membranes and adhesives
• Porous substrates such as concrete, screeds, and render
• Fibre cement, plasterboard, and aerated concrete surfaces
• Masonry, brickwork, and compressed sheeting
• Suitable for bathrooms, balconies, and general wet areas

• Appearance: Milky white liquid (dries clear)
• Type: Water-based acrylic primer
• Application method: Brush or roller
• Coverage: Approx. 8–10 m² per litre (varies with substrate porosity)
• Drying time: Approx. 30 minutes @ 20 °C / 50 % RH
• Recoat / overcoat: Once dry to touch
• Packaging: 5 L and 20 L containers
• Shelf life: 12 months (unopened, stored in a dry area at room temperature)
• Clean-up: Water while wet
• Application temperature: Between 5 °C and 35 °C
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