Sikalastic – 1K

MIXING

Sikalastic®-1K can be mixed with a low speed (~ 500 r/min) hand drill mixer, adding the right quantity of water according to the respective application. Once a homogeneous mix is obtained, continue mixing for 3–4 min. The mortar must be homogeneous and lump free. Do not add any additional water or other ingredients. Each bag must be entirely mixed, to avoid faulty particle size distribution of aggregates contained in the powder component.

APPLICATION

Special Requirements:

All connections between the substrate and pipe entries, plant and equipment, light switches etc., must be sealed and watertight. Joints in concrete, pipes or anywhere else in the structure must also be sealed and made watertight.
Use coved details at the floor/wall junctions.
Apply Sikalastic®-1K by:

• spatula/roller: Exerting good and even pressure onto the substrate;
• brush: In 2 directions (diagonally opposite / cross-wise);
• mechanical spray: Refer to Sika Technical Service for details

The optimum waterproofing performance is obtained by applying Sikalastic®-1K by trowel in at least 2 layers, to a total thickness of at least 3 mm.
Application by brush must be undertaken with the maximum attention to uniformly covering the whole surface. The maximum recommended thickness for these methods of application is 1 mm per layer. In these situations, the application of min. 2–3 layers is required (subsequent layers must be applied crosswise).
Wait until the first layer is dry before applying subsequent layers.
The application shall cover the whole surface of the substrate in a uniform thickness.
Sikalastic®-1K cannot be smoothed using float or sponge trowel. It is possible to smooth the surface as soon as the curing of the product is complete by light abrasion techniques.

JOINTS
At joints or other critical movement areas (for example junctions with vertical surfaces), the waterproofing may be reinforced by Sika® Seal Tape S. It must be applied directly on the fresh first layer and then covered by the second layer of Sikalastic®-1K. Please Note Sika® Seal Tape S is not suitable for swimming pools; for immersed and tanking applications the Sikadur Combiflex® SG System is recommended, contact Sika Technical Services for additional information.
TILING
Ceramic and vitreous tiles may be installed on Sikalastic ®-1K using a polymer modified cement based tile adhesive in the Sika® range. All joints and gaps must be sealed.