Euclid Chemstop WB HD is a heavy-duty, water-based silane/siloxane water repellent and chloride protector. Shields concrete and masonry from moisture intrusion and chloride ion penetration, extending the lifespan and maintaining the integrity of the structure.
Euclid Chemstop WB HD is a water-based, ready-to-use silane/siloxane penetrating water repellent formulated for porous concrete and masonry surfaces. It penetrates the substrate to help repel water and salts while remaining breathable, non-staining, and non-yellowing. Chemstop WB HD is a strong fit for lightweight concrete, concrete block, mortar joints, brick, and natural stone where reduced water and chloride absorption can help extend service life.
| Property | Value |
|---|---|
| Product Type | Water-based silane/siloxane penetrating water repellent |
| Version | Heavy Duty, formulated for porous surfaces |
| Packaging | 5 gallon pail |
| Shelf Life | 1 year in original, unopened package |
| Viscosity | 50 cp |
| Depth of Penetration | 3/8 inch, substrate dependent |
| Active Content by Weight | 10% |
| Reduction in Water Leakage, Brick | 100% per ASTM E514 |
| Reduction in Water Leakage, Mortar Block | Greater than 91% per ASTM E514 |
| Reduction in Water Absorption | 92.3% per SS-W-110C |
| Flash Point | Greater than 200°F |
| Accelerated Weathering | No change after 1500 hours per ASTM G154 |
| Abrasion Resistance | Excellent |
| Dirt Pick-Up | None |
| VOC Content | Less than 50 g/L |
| Coverage, First Coat | 40 to 60 sq ft per gallon on porous surfaces |
| Coverage, Second Coat | 60 to 100 sq ft per gallon on porous surfaces |
| Application Method | Low-pressure airless spray preferred, brush or roller acceptable for smaller areas |
| Compliance | Federal specification SS-W-110C; complies with U.S. EPA, OTC, LADCO, Maricopa County, CARB, and SCAQMD VOC regulations |
What is Euclid Chemstop WB HD used for?
It is used to protect porous concrete and masonry surfaces by helping them repel water and salts while remaining breathable.
What surfaces is the Heavy Duty version designed for?
Chemstop WB HD is designed for porous surfaces such as lightweight concrete, concrete block, mortar joints, brick, and natural stone.
Will Chemstop WB HD change the look of the substrate?
No. It dries clear, leaves no gloss, and is designed not to alter the texture or appearance of the treated surface.
How is Chemstop WB HD applied?
Low-pressure airless spray is the preferred method. On porous surfaces, two or more saturation coats may be required using a wet-on-wet technique.
How soon does water repellency develop?
Water repellency typically develops from 24 hours to 5 days after application.
What should be avoided during application?
Do not dilute the product, do not apply below 45°F or above 90°F, do not apply if rain is expected within 12 hours, and do not allow the product to puddle or build up on the surface.
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