Product Data Sheet Show all documents

SikaControl®-501 WT

(former MSeal 501WA)

Crystalline Waterproofing admixture for Concrete

SikaControl®-501 WT is a corrosion free concrete waterproofing admixture used for the treatment of concrete and concrete products.     
SikaControl®-501 WT reacts with the hydration products of cement to form crystals within the pores and capillaries of concrete structures, thereby effectively blocking the passage of water.    
Complete waterproofing is normally achieved within 5 – 7 days from final set. After the crystallisation process has successfully waterproofed the concrete the active chemicals of SikaControl®-501 WT remain dormant in the concrete. Any subsequent contact with water will reactivate the SikaControl®-501 WT sealing process.  

  • Provides total and permanent waterproofing properties.
  • Protects concrete and reinforcement against corrosive waterborne substances.
  • Crystalline action is reactivated by contact with water providing dormant additional protection.
  • Effective against both positive and negative pressure.
  • Non-toxic or tainting.
Product Data Sheet Show all documents

Usage

SikaControl®-501 WT is a corrosion free concrete waterproofing admixture. Used for the treatment of concrete and concrete products to protect against:     
  • Water intrusion
  • Leakage and / or cracking
  • Chemical attack and corrosion of reinforcing steel.

Advantages

  • Provides total and permanent waterproofing properties.
  • Protects concrete and reinforcement against corrosive waterborne substances.
  • Crystalline action is reactivated by contact with water providing dormant additional protection.
  • Effective against both positive and negative pressure.
  • Non-toxic or tainting.

Packaging

SikaControl®-501 WT is supplied in 25kg bags.

Product Details

Product Information

Shelf Life

12 months from date of production if stored in unopened and undamaged original sealed containers.

Storage Conditions

Storage at temperatures between 5 °C and 30 °C. Protect from direct sunlight, moisture, frost and contamination.

 
Technical Information

Indicative performance of mortar mix

Concrete properties listed are for guidance and are not a guarantee of performance.


Aspect                                Control                  SikaControl®-501 WT
W/C Ratio                             0.51                       0.50
Initial Set                              5.50 hours            7.50 hours
Final Set                                7.20 hours            9.50 hours
Air                                          1.50%                    1.50%
Slump                                    100mm                 100mm
Compressive Strength         31.5 N/mm²         36 N/mm²
Drying Shrinkage (micron)   380                       340
Water Permeability               9.5 x 10 -13         6.1 x 10 -13


The addition of SikaControl®-501 WT will increase the strength of standard concrete over that of a control mix, will reduce the shrinkage, and reduce the permeability of the concrete.
Most other properties remain the same however there is an approximate two-hour delay in the setting time that should be factored into the finishing operations.

Curing Conditions

Concrete containing SikaControl®-501 WT must be prevented from drying out too rapidly and should be kept damp for 5 – 7 days. Mist spraying with water and covering with polythene is effective when drying out would otherwise take place. Protect from weathering, sun, frost and wind for a similar minimum period.

Application

Consumption

Recommended Dosage

SikaControl®-501 WT is a dry powder which is added to the concrete at the batch plant at the rate of 1.5% of total cementitious content up to a maximum of 6 kg per cubic metre of concrete.

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