Concrete Solutions for architects, engineers and builders since 1974

StarSeal EF Weather Seal 100

STARSEAL EF WEATHER SEAL 100 is a premium high performance 100% active silane water repellent penetrating sealer that provides maximum protection for high traffic and harsh weather environments. The material’s small molecular structure allows for deep penetration into new concrete (14 day minimum) or existing concrete and masonry surfaces. StarSeal EF Weather Seal 100 stops penetration of water, salts, deicing chemicals, and acid rain, which often result in efflorescence, mildew growth, corrosion, scaling, spalling, surface erosion and other costly damage to concrete and masonry surfaces. Surfaces treated with StarSeal EF Weather Seal 100 have a totally natural appearance.

Ideal for bridge and parking decks and other reinforced concrete structures.


  • Extends the life of concrete and masonry
  • DOT approved
  • Maximum long term protection against salt corrosion, deicing chemicals, mildew, water,wind driven rain, airborne contaminants, surface spalling from freeze/thaw cycles and other harsh weather conditions
  • Reduces corrosion of rebar and surface erosion in reinforced concrete
  • Breathable – Prevents damage from within by maintaining vapor permeability of substrate
  • No masking of windows necessary
  • Low VOC <250 grams/liter
  • Superior water repellency
  • Can be applied to damp surfaces
  • Suitable for alkaline concrete surfaces
  • Reduces on-going maintenance and repair costs
  • Does not alter natural surface texture or appearance
  • Keeps surface cleaner
  • Apply to temperatures as low as 20°F (-6° C)



Gurad/Film Forming Sealers

Penetrating Sealer and Concrete Curing in one easy-to-use product.