Description and use

Sure Klean® Weather Seal H40 is formulated as a deep-penetrating water repellent and consolidation treatment for brick, most natural stone, terra cotta, historic concrete, stucco and cast stone surfaces. H40 protects against deterioration caused by water and water-borne contaminants while strengthening weathered surfaces and soft mortar joints.

Manufactured and marketed in compliance with USEPA VOC regulations (40 CFR 59.403).


  • Deep penetration provides long-lasting protection
  • Strengthens and protects deteriorating surfaces
  • Strengthens soft mortar -- reduces need for repointing
  • Treated surfaces "breathe" -- H40 does not entrap moisture


  • May damage glass or be difficult to remove. Always protect.
  • May cause slight or moderate darkening on some surfaces. Always test for desired results.
  • Surface and air temperatures should be above 40°F and below 95°F. Application should be avoided on extremely windy days to avoid rapid evaporation of the solvent carrier.
Container Info
SKU Size Weight Ship ID*
40080-01GALCS 4/1 gal 32.7 lbs 1
40080-01GALPLT 144/1 gal 1245 lbs 1
40080-05GAL 1/5 gal 39.4 lbs 1
40080-05GALPLT 32/5 gal 1337 lbs 1
40080-55GAL 1/55 gal 442 lbs 1
40080-55GALPLT 4/55 gal 1825 lbs 1
*Shipping Descriptions
Ship Id Hazardous Keep From Freezing Freeze Point Flash Point Shelf Life NMFC
1 No No <-22 108 2 yrs 33880 SUB 2
Description: Non-Hazardous/Non-Regulated (under 119 gallons per container)
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