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  • Item: MasonrySaver Water Repellent for Split-Face Block
  SKU: SS22105  Q/A: data-sheet
  Size: Available in 5, 30, and 55 gallon recyclable containers.
  Property Type: silane/siloxane/acrylic
  Appearance: Milky White
  VOC Content: 78 g/L EPA Method 24  
  Case Pack: 5-gallon
Case Pack: 30-gallon
Case Pack: 55-gallon
  Shelf Life: 18 months in original sealed container.  
  UPC Code: 7-09057-22105-4; 5-gallon
UPC Code: 7-09057-22130-6; 30-gallon
UPC Code: 7-09057-22155-9; 55-gallon
  Product Description  

MasonrySaver Water Repellent for Split-Face Block is a one component, VOC compliant water repellent sealer for use on all vertical block surfaces, but specifically lightweight, split-face and fluted block. MasonrySaver Water Repellent for Split-Face Block is a silane/siloxane blend with acrylic elastomers that penetrate small pores and capillaries and reduces the size of larger ones. The unique resin blend is UV stable and allows for penetration up to 3/4 of an inch or more depending on porosity of the concrete masonry unit (CMU). This creates a deep, long-lasting hydrophobic zone within the subsurface while producing only a minimal glossy look. The acrylic elastomers seal larger pores and capillaries while the hydrophobic (silane/ siloxane) ingredients change the contact angle of the block pores from negative (suction) to positive (repellent). This causes water to shed, and significantly reduces water penetration into a wall system. MasonrySaver Water Repellent for Split-Face Block combines the advantages of a film forming coating and hydrophobic silane/siloxane water repellent.

  • Efflorescence/Stain Protection
  • Freeze-Thaw Protection
  • Protection from Acid Rain and Water Borne Chemicals
  • Controls Rainwater Penetration Through Exterior CMU Walls
  MasonrySaver Water Repellent for Split-Face Block

MasonrySaver Water Repellent for Split-Face BlockWhere to Use:
MasonrySaver Water Repellent for Split-Face Block is recommended for use on all porous, vertical, above grade concrete masonry units including smooth, split-faced, burnished fluted or ribbed, and concrete brick. Natural substrate color and surface textures are only minimally affected, adding only a slight sheen and darkening. It can be used on denser clay brick where some gloss and sheen are desirable. Testing is recommended before treating any surface to ensure desired results.

Protect all adjacent glossy surfaces, paint films, windows, plant life, asphalt-based materials and all other non-targeted surfaces from overspray and run-down. Remove overspray from non-targeted surfaces immediately with soap and water. Apply to southern exposed areas during coolest part of day. Shake well before using. Apply from bottom up using a low pressure sprayer (10-25 psi) with a fan type nozzle, or by airless sprayer. Flood surface until excess runs down six to eight inches below spray or roller pattern. For maximum penetration and desired coverage rates, a wet on wet application is recommended; retreat within three to five minutes after initial application. When treating fluted block, apply in an overlapping X pattern to ensure complete coverage of recessed surfaces. A wet treated surface may be agitated with a soft bristle scrub brush to ensure more even distribution and greater penetration.

Painting a MasonrySaver Treated Surface:
MasonrySaver Water Repellent for Split- Face Block is compatible with most quality oil base paints recommended for exterior masonry surfaces. When painting over surfaces treated with MasonrySaver Water Repellent for Split-Face Block, a small test area should be painted to ensure good adhesion and desired results.

What are the Coverage Rate(s):
Coverage rates will range from 40 to 125 square feet per gallon per coat of application depending upon surface porosity. When treating fluted, scored, and split-face block, allow for reduced coverage due to increased surface area. Material requirements and desired results should always be determined by test applications.

When to Apply:
Surface and air temperatures should be a minimum of 40°F. Do not use on asphalt-based material and surfaces. Do not apply to frozen or frost covered surfaces. Application must be to clean, sound, dry to slightly damp surfaces. Do not apply to wet or water saturated surfaces, or when rainfall is expected within six hours.

How Long to Wait:
To touch, thirty minutes to two hours depending on temperature and humidity.

What is a Silane/Siloxane/Acrylic Blend:
Patented modified siloxanes react with ultraviolet light and moisture to create a water-repellent affect. Blended with silane for greater penetration and resistance to alkalinity. Consistently outperforms other products on a greater range of substrates. Excellent alkaline resistance and depth of penetration make them long-lasting. Excellent resistance to salt and ice melting products. Excellent water repellency, excellent vapor transmission.  Modified with acrylic resin to perform on extremely porous surfaces. Product can produce some sheen or darkening, depending on the porosity of the substrate.

Safety Precautions to Observe:
Proper safety procedures should be followed at all times while handling the product. Wear chemical resistant gloves and chemical splash goggles. 

Refer to the Material Safety Data Sheet for important health and safety information before use.

  Worth Quoting...  
  " MasonrySaver® Water Repellent for Split Face Block is a waterborne block sealer that causes water to shed, and significantly reduces water penetration into a wall system. It is specifically designed for lightweight, split face and fluted block. "  
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