Sika Sikagard 552W Aquaprimer

Sikagard® 552 W Aquaprimer is a one component, water dispersed primer, offering excellent adhesion to water dispersed, polymer paint coatings, and complying with the requirements of EN 1504-2 for superior protection against water ingress.

Best Uses

Sikagard® 552 W Aquaprimer is best used in areas where moisture and humidity is a concern and works as part of a system that protects the substrate and ensures a long term protective solution. Ideal as a priming coat for concrete and dense mineral substrates like fibre cement, aerated concrete, gypsum and thin rendering such as Sika® MonoTop®-3020 etc.

Sikagard®-552 W Aquaprimer can also be used as a primer on firmly adhering existing water based coatings or under cement resurfacing mortar to improve
the adhesion in case of concrete surface treated with hydrophobic impregnation. Sikagard®-552 W Aquaprimer is part of a system: Suitable for protection against ingress (Principle 1, method 1.3 of EN 1504-9), Suitable for moisture control (Principle 2, method 2.3 of EN 1504-9), Suitable for increasing the resistivity (Principle 8,
method 8.3 of EN 1504-9).

• Water dispersed - solvent-free
• Environmentally friendly
• Water vapour permeable
• Can be used as an adhesion promoter for coating or cement based resurfacing mortar

Application

The substrate must be dense and free from loose and friable particles. Tensile strength of the substrate must be more than 1 N/mm2. Exposed concrete without existing coating. Suitable preparation methods are steam cleaning, high pressure water jetting or blastcleaning. New concrete must be at least 28 days old.

Thin layer rendering: If required, a levelling pore sealer/smoothing coat (e.g. Sika® MonoTop®-620, Sikagard®-545 W Elastofill, etc.) shall be applied – refer to the respective product data sheet. For cement based products, allow a curing time of at least 4 days before priming. Exposed concrete with existing coating
Existing coatings must be tested to confirm their adhesion to the substrate - adhesion test average: > 1.0 N/mm2 with no single value below 0.7 N/mm2 for subsequent top rigid coating; > 0.8 N/mm2 with no single value below 0.5 N/mm2 for subsequent top elastic coating respectively.

• For water based coating, use Sikagard®-552 W Aquaprimer as primer
• For solvent based coating, use Sikagard®-551 S Elastic Primer - refer to separate data sheet
• If coating type is unknown, carry out adherence testing to determine which primer is most suitable - wait at least 2 weeks after application prior to conduct the adhesion test as per EN 1542

Surface and Environment

Sikagard® 552 W Aquaprimer has been designed for application to concrete, and dense mineral substrates such as, fibre cement, aerated concrete, gypsum and smooth coatings like Sika Monotop 610.