Part 1 — General
1.1 Section Includes
A.Penetrating concrete sealer applied to concrete, masonry, or stone surface.
1.2 RELATED SECTIONS Not Used
1.3 References
A.ASTM D 3960: Volatile Organic Compound (VOC) Content of Paints and Related Coatings
B.ASTM D 4285: Indicating Oil or Water in Compressed Air
1.4 DEFINITIONS Not Used
1.5 Submittals
A.Manufacturer’s product data sheets and recommended installation instructions for review.
Part 2 — Products
2.1 Penetrating Concrete Sealers
A.Choose from the following list:
1.Alkoxy Silane (98 percent or greater silane)
2.Isobutyl triethoxy Silane (98 percent or greater silane)
B.Meet VOC content of 350 g/L or less for a reactive penetrating sealer. Refer to ASTM D 3960.
C.Can be applied to either new or existing surfaces.
D.Dries clear without significant change in surface appearance.
E.Product can be applied on horizontal, vertical and overhead surfaces.
2.2 Equipment
A.Sandblaster/Air Compressor
1.Verify air is free of water and oil according to ASTM D 4285.
B.Pressure Washer
1.Minimum 3000 psi but no more than 5000 psi
Part 3 — Execution
3.1 Preparation
A.Cure concrete for 28 days before sealer application.
1.Rapid setting patch materials do not need to cure for 28 days, but must meet moisture content levels specified in this Section.
B.Completely remove curing compounds, oil, grease, dirt, and any other surface contaminants from concrete surfaces.
1.Use one of the following methods:
a.Pressure washing
b.Shotblasting
c.Sandblasting
C.Remove dust or debris just before application of the product with compressed air.
D.Measure moisture content with an electronic concrete moisture meter at three or more locations along the area to be sealed in the presence of the Engineer.
1.Measure recently patched concrete areas separately.
2.Do not apply sealer if any measurements exceed 4.0 percent.
3.2 Limitations
A.Apply when the outside air temperature is between 45 and 90 degrees F, and will remain between 45 and 90 degrees F for 24 hours or the manufacturer's recommended cure time, whichever is longer.
B.Do not apply within 24 hours of a rain event or pressure washing, nor if a rain event is forecasted within 8 hours.
3.3 Application
A.Apply according to the manufacturer’s recommendations, except for the following.
1.Apply each coat at an application rate of 1 gal penetrating concrete sealer to 250 sq ft.
B.Apply two separate coats of penetrating concrete sealer.
1.Apply second coat while the first coat is still wet to the touch.
C.The sealer is considered defective if clouding or chalking occurs after placement.
3.4 Protection
A.Prevent sandblasting material, sealer and debris from falling into waterways, pedestrian areas, traffic areas, or onto railroad tracks.
B.Protect roadway surfaces from overspray.
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Source: Utah Standard Specifications for Road and Bridge Construction, 2027 Edition. Pages 1081–1083 of 1,343. View official source ↗