Description
RIW Cementseal Primer 5 Litres
RIW Cementseal Primer is a premium water-based acrylic copolymer primer and curing agent designed to prepare concrete and masonry substrates before the application of cementitious waterproof coatings and mortars. This multi-functional primer stabilises porous surfaces, prevents out-gassing and improves the bond between the substrate and waterproofing systems, ensuring reliable long-term performance.
Suitable for both new and existing concrete, Cementseal Primer also acts as an effective curing membrane for freshly applied cement-based mortars and coatings by reducing water evaporation during the curing process. It can also be used to reduce the leaching of free lime and mineral salts before the installation of cavity drainage membranes, making it an essential preparation product for professional waterproofing systems.
Key Benefits
- Water-based acrylic copolymer primer
- Multi-functional primer and curing agent
- Suitable for damp concrete and masonry
- Prevents out-gassing beneath waterproof coatings
- Seals porous concrete and masonry substrates
- Assists curing of cement-based mortars and coatings
- Helps reduce free lime and salt migration
- Ready to use – no dilution required
- Environmentally friendly
- Low odour formulation
- Easy brush, roller or spray application
Applications
- Primer for cementitious waterproof coatings
- Primer for waterproof mortars
- Concrete sealer
- Masonry sealer
- Basement waterproofing preparation
- Curing membrane for fresh concrete repairs
- Concrete floor preparation
- Waterproof coating preparation
- Cavity drainage membrane preparation
- Structural waterproofing systems
Technical Information
- Product Type: Water-based acrylic copolymer primer and curing agent
- Appearance: Milky white liquid
- Pack Size: 5 Litres
- Coverage: 5–7m² per litre
- Primer Drying Time: 30–90 minutes
- Curing Membrane Drying Time: Approximately 15 minutes
- pH: 7–8
- Flash Point: Non-flammable (liquid form)
- Application Temperature: Minimum +5°C
- Shelf Life: 12 months
- Application: Ready to use – do not dilute
Frequently Asked Questions
What is RIW Cementseal Primer used for?
It is used to prime concrete and masonry before applying cement-based waterproof coatings and mortars, while also acting as a curing membrane for freshly applied cementitious products.
Can Cementseal Primer be applied to damp surfaces?
Yes. It is specifically designed for application to saturated surface-dry concrete and masonry substrates.
Does the primer need diluting?
No. Cementseal Primer is supplied ready for use and should be applied without dilution.
How much coverage does one 5-litre container provide?
Coverage is approximately 5–7m² per litre, depending on the substrate, providing up to 35m² per container under normal conditions.
Can it be used as a curing membrane?
Yes. It helps reduce moisture loss from freshly applied cement-based mortars and waterproof coatings, improving the curing process.
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