CRYSTALLINE CAPILLARY WATERPROOFING SYSTEM FOR CEMENTITIOUS SUBSTRATES

Surface preparation
Old Concrete
Surfaces must be clean and sound. Remove all oil, dirt, laitance and other contaminants by water blasting.

Water blasting is preferred for surface preparation because it mechanically cleans and roughens the surface, is environmentally safer and leaves the surface saturated with water. Surface must be damp for application of SpECtite WS crystalline waterproofing system, concentrate.

New Concrete
After forms are stripped, acid etch or water blast as above to remove form oils and laitance. Surface must be left damp for application on SpECtite WS crystalline waterproofing system.

Construction joints, cold joints and non-leaking joints greater than 0.25mm wide must be cut in V-groove shape and filled with SpECtite WS crystalline waterproofing system in mortar consistency.

Mixing
For best results, clean, potable water should be added to SpECtite WS crystalline waterproofing system concentrate. The recommended mixing ratio is approximately 5.0 litre of water for 25 kg bag of SpECtite WS.

The powder shall be added to the clean water and mixed thoroughly with-slow speed drill equipped with a paddle. For larger batches, mixing shall be done with a mortar mixer. Do not mix more material than can be used in 20 minutes @ 24°C, 50% R.H. If mixture thickens, it shall be restirred to reduce consistency. Extra water should not be added.

Brush/Trowel Method
When applying by brush use a medium hard, short bristle type. Trowelling of the second coat can be carried out to provide a dense polished finish.

Spray Method
For large areas spray application is obviously more economical – our technical department would be pleased to advise on suitable equipment.

Dry Shake Method
SpECtite WS can be uniformly applied in powder form on Lean Concrete before casting the slab as long as it is ensured that the concrete casting process does not disperse the SpECtite WS powder. SpECtite WS can also be applied uniformly onto the concrete in powder form and then finished with helicopter trowel.

Curing and Protecting
SpECtite WS crystalline waterproofing system application must be kept moist for a minimum of 48 hours. After initial set, treated surfaces shall be fog sprayed 3 to 4 times daily for the 48 hour period. For warmer climates, more frequent spraying may be required. It is important to keep the SpECtite WS crystalline waterproofing system moist to allow the crystal formation to occur. The surfaces shall be protected from foot traffic for 48 hours or heavy traffic
for 7 days. Freshly applied SpECtite WS crystalline waterproofing system must be protected from extreme weather conditions such as rain, strong winds, high temperatures and freezing for a period of not less than 48 hours after application. A minimum of 7 days of air curing shall be allowed prior to immersing the surface in water.
Clean Up
Prior to curing, SpECtite WS crystalline waterproofing system concentrate may be cleaned from tools and other surfaces with water.