Sika® Microcrete®-217

6 months from the date of production, if stored properly in original, unopened and undamaged packaging.

Store in dry conditions between +20 °C to +30 °C. Protect from direct sunlight, moisture, water and rain.

~2.25 kg/l (freshly mixed mortar)

6 mm

Flowable consistency: 3.0–3.3 L of water per 25 kg bag

25 mm min. / 300 mm max. per pour

40 minutes min. (at +30 °C)

Sika® Microcrete®-217 should be mechanically mixed in a clean container using a Collomix Mixer with mixing paddle MK type (or any other equivalent Force-Action Mixer with the appropriate paddle, if any) to achieve the required flow, workability and quality.

If a heavy-duty hand-drill mixer is used, it must be fitted with a mixing paddle that provides high shear force and thorough mixing. In some cases, the use of a hand-drill mixer may restrict the flowability and workability of the concrete.

Firstly, place the required water into a clean mixing container and add Sika® Microcrete®-217 slowly while mixing. During mixing, the material will initially have a visibly stiff appearance, but upon continuous stirring, it will become free-flowing. Mix for a minimum of 3 minutes, until the mix is homogenous. Do not add any additional water to improve flowability and workability as this will have a negative impact on both the physical and mechanical properties of the concrete.

The speed of the mixer should not exceed 500 rpm to minimise air entrainment.

After mixing, stir lightly with a spatula for a few seconds to release any entrapped air. Pour the free flowing concrete immediately into the prepared formwork. Place the concrete within 40 minutes after mixing. Pour the concrete onto the lowest point in the formwork. Care shall be taken not to entrap any air during the repair operation as this may affect the bonding properties of the concrete to the substrate.

When placing Sika® Microcrete®-217 over a large area, it is important to maintain a continuous flow throughout the concreting operation. Work sequence must be properly organised to ensure an uninterrupted flow of Sika® Microcrete®-217.

Exposed surfaces should be kept to a minimum and cured with appropriate curing methods as soon as the concrete has hardened.

The formwork can be stripped at minimum 3 days later.

Upon removal of the formwork, cure the repaired areas immediately with Antisol® E curing compound if no further treatment is required or Antisol® - A curing compound if a protective coating is to be applied (consult our Technical Service Department) – refer to the respective Product Data Sheet for application rate and method.

Clean all tools and application equipment with water immediately after use. Hardened or cured material can only be mechanically removed.