LL10 & LL20 Water Repellents

LL10 & LL20 Clear Siloxane Masonry Sealants

Available in: 5 gallon pails & 55 gallon drums

KARNAK LL10 & LL20 are environmentally friendly colorless silane modified siloxane emulsions manufactured for use as masonry water repellents. They are formulated for deep penetration which enables surfaces to shed water effectively. The active material penetrates into the substrate and condenses to give hydrophobic characteristics to the substrate. The reaction does not substantially affect the water vapor permeability of the treated surfaces



•Prevents concrete corrosion by blocking salt penetration
•Water repellency
•Effective protection, even in wind- driven rain
•Good penetration
•Reduction of salt blooming
•Non-tacky finish
•Normally, no visible change of surface
•Prevents spalling

    LL10 VOC: 0 g/L


  • Fed Spec SS-W-11OC; NCHRP 244 Series II

Absorption Testing of Two Waterproofing Products in Accordance with Federal Specification, SS-W-110C-Water Repellent, Colorless, Silicone Resin Base.

Water Repellant Chart (Absorption vs. Control)
Uncoated 24 hr. Absorption%, Coated 72 hr. Absorption %, Absorption Reduction %;
LL10 (10%) 8.4, 0.97, 88.0

NCHRP 244 Series II Results
Chloride Ion (Salt) Intrusion LL10 84%


Coverage Calculator

  • 0.6-0.8 Gallons per 100sf**


This is intended as a general guideline only, coverage can vary based on many factors.


KARNAK LL10 & LL20 are water repellents designed specifically for use on fresh concrete and similar alkaline substrates. Neutral substrates will require longer curing times to develop similar water repellent characteristics.

Physical Properties

Density, #/ga – LL10:8.3

Preparation & Application

Application of the KARNAK LL10 &  ( LL20) solution should be made onto a clean, dry surface free of oil, grease, dirt, laitance and adhesion-inhibiting  materials.

KARNAK LL10 & ( LL20) (stir before using) can easily be applied by brushing or spraying until the surface is saturated. Full curing requires 7 – 10 days. Apply the solution by starting at the top of the structure and working downward. Avoid rundown or drips. Application should be made at temperatures of 40°F and rising. Examples of application fields:
•Pre-cast concrete
•Clay tile
•Field stone
•Stucco, brick, terra-cotta

Apply at a rate of 125-175 square feet per gallon.

Caution/Care of Tools

Do not apply when rain is imminent. Protect from freezing. Coating must be dried before exposure to water. Store in a heated room and keep container  covered when not in use. Do not thin. Cover air intakes during application and while drying. Keep out of reach of children. Avoid prolonged contact with skin. Wear protective eye wear. Dispose of in an environmentally safe manner. For additional information refer to the SDS sheet. Do not store material at extreme temperature, below 32°F (0°C) or above 125°F (50°C) for any length of time. KARNAK LL10 & (LL20) has a shelf life of 12 months from date of  delivery when stored in unopened containers at room temperatures.

Tools and other equipment should be thoroughly cleaned with soap and water immediately after use. Mineral spirits may be needed for clean-up if tools are allowed to dry, taking necessary precautions when handling combustible materials.