613.1Description.
This work consists of providing and applying coating systems and waterproofing for concrete structures.
613.2Materials.
A.Epoxy Concrete Sealer Section 1045
B.Silicone-Based Acrylic Concrete Sealer Section 1045
C.Silane Based Concrete Sealer Section 1045.3
D.High-Molecular Weight Methacrylate Concrete Sealer Section 1045
E.Waterproofing Membranes Section 1045
F.Aesthetic Staining Section 1045
G.Mortar Sand Section 1003
613.3Construction.
A.Submittals.
1.Submit a manufacturer's letter of certification for an approved installer or arrange to have a
manufacturer's representative on site during surface preparation and coating application.
2.Supply a MSDS and a certificate of compliance of the batch and lot for each shipment of
concrete sealer materials. Provide a manufacturer's analysis report of the materials used with the specified batch shipped to the job site.
3.Provide the manufacturer's instructions for installing the system at least 2-weeks before
beginning surface preparation.
B.Surface preparation and coating application.
1.Cure concrete in accordance with Section 610 or the time specified in the manufacturer's recommendations, whichever is longer. Complete texturing, saw cutting, grooving, and repointing on new concrete surfaces before preparing the surface for sealer. Complete repairs on existing concrete surfaces in accordance with Section 628.
2.Remove loose material, grease, dirt, salt, efflorescence, laitance, curing compound, previous
sealers and paints, and other matter from concrete surfaces in accordance with ASTM D4258 and SSPC-SP-13. Do not use sandblasting or shot-blasting on textured or form-lined concrete surfaces or on surfaces to receive aesthetic staining.
3.For new concrete, high-pressure-wash the surface with water at a flow rate and pressure
sufficient to clean, but not damage the concrete surface. Repair concrete surface damage resulting from the high-pressure wash. After high-pressure washing or a rain event, allow 48- hours for the surface to dry before continuing the surface preparation process.
4.For existing concrete, shot-blast the surface with a pressure sufficient to clean the surface and
remove dirt, debris, laitance, oil, and any other unallowable material without damaging the concrete. Vacuum and remove all shot and removed material.
5.Blow the surface area clean with oil-free compressed air immediately before coating application.
6.Protect private and public property, pedestrians, workers, and vehicles on, beneath, or adjacent
to the structure from the effects of surface preparation and sealer applications.
7.Apply coatings and membranes when the range of surface and ambient temperatures and
weather conditions recommended by the manufacturer are forecast to continue until the coating cures.
8.Do not begin applying coating until the engineer approves the surface preparation work.
C.Epoxy concrete sealer.
1.Apply the sealer as supplied by the manufacturer without thinning or alteration, unless
specifically required in the manufacturer's instructions and verified by the engineer.
2.Apply the sealer material using the coverage rate and equipment in accordance with the
manufacturer's recommendations.
3.Follow the manufacturer's recommendation for coating thickness. Do not allow drips, runs, or
sags during application.
4.Broadcast oven-dried fine aggregate on the surface after applying the epoxy material. Brush off
excess fine aggregate after the epoxy coating has dried.
D.Silicone-based acrylic sealer, and silane-based concrete sealer.
1.Apply the sealer as supplied by the manufacturer without thinning or alteration, unless
specifically required in the manufacturer's instructions and verified by the engineer.
2.Apply the sealer material using the coverage rate and equipment in accordance with the
manufacturer's recommendations. Apply a minimum of 2 coats. Follow the manufacturer's recommendations for drying times between coats. Calculate the yield for each concrete surface and submit to the engineer. If the yield does not meet the minimum coverage rate, recoat the entire area.
3.Follow the manufacturer's recommendation for coating thickness. Do not allow drips, runs, or
sags during application. Use a brush, roller, or sprayer to perform the application.
4.Allow silicone-based acrylic sealer to dry 1-week before testing adhesion, in accordance with
ASTM D7234.
5.Do not allow traffic on the treated surface until the waterproofing solution is completely
absorbed and the surface is dry and, in accordance with the manufacturer's recommendations.
E.High molecular weight methacrylate concrete sealer.
1.Follow the manufacturer's safety precautions for using all materials and equipment. Store
materials in accordance with the manufacturer's recommendations. Fire codes may require special storage facilities for some components of the system.
2.Apply the crack sealing material without thinning or alteration in accordance with the
manufacturer’s recommendations.
3.If excess material remains on the surface after completing crack sealing, cover the area with a
light broadcast of a dry sand meeting the requirements of Section 1003. Use only enough sand needed to absorb the excess material. Follow the manufacturer's recommendation regarding sand broadcast timing. Brush off excess sand when the sealer has dried.
4.Keep traffic off the treated surface for a minimum of 4-hours when temperatures are 70
degrees F and above and for a minimum of 6-hours when temperatures are below 70 degrees F.
5.Open treated surface to traffic only after receiving approval from the engineer.
F.Waterproofing membranes.
1.Remove hot mix and roadway fill to expose the existing concrete deck. Patch holes or voids in
the concrete deck in accordance with Section 628. Remove sharp protrusions.
2.For locations where bituminous overlay is placed directly on top of the membrane, provide a
membrane capable of withstanding the asphalt temperature at placement.
3.Place the membrane and other system components in accordance with the manufacturer's
recommendations.
4.Overlap the membrane sheets by at least 3-inches or as specified by the manufacturer,
whichever is greater. Stagger membrane overlaps in the transverse direction.
5.Seal the overlaps at the end of each roll and bond the membrane to the curb by heating with a
propane torch. Eliminate all entrapped air bubbles by puncturing the membrane and patching.
6.Place a tack coat on the membrane before the overlay application.
G.Aesthetic Staining.
1.Blend stain and coloring agents necessary to produce the appearance, texture, color
combinations and patterns, and range of colors in accordance with the contract. Colors may include a base color, heavy accent color, light accent color, speckling color, and a joint color.
2.Perform quality control test by applying stain to sample panels or test sections as directed by
the engineer to demonstrate that the application equipment is working properly and that the material will obtain acceptable appearance. Authorization to proceed will be given by the engineer when the quality control test indicates conformance.
3.Once approved by the engineer, apply stain to structures in the field after structure completion,
at the locations shown in the contract. Apply stain in accordance with the manufacturer’s recommendations. Unless otherwise noted, apply 2 coats of stain.
4.Finished stain surface is to be free of blemishes, discolorations, surface voids, and conspicuous
form marks. Repair all surface defects with patching material that matches the texture and color of the surrounding concrete as directed by the engineer.
613.4Method of Measurement.
A.The Department will measure the quantity of concrete coatings as the number of square feet of
concrete surface area coated and accepted.
B.For aesthetic staining, the Department will measure an approved sample panel as an additional
concrete surface area.
C.The Department will not measure the quantity of sealer for precast concrete elements.
613.5Basis of Payment.
A.Price and payment for concrete coatings will constitute full compensation for:
1.The technical representative;
2.providing all materials;
3.providing, placing, and removing scaffolding;
4.surface preparation;
5.collection and disposal of pressure wash water and shot blast media;
6.application of coating material;
7.disposal of discarded materials; and
8.recoating due to low application rates.
B.The Department will not pay for aesthetic staining of rejected sample panels or test sections.
C.The Department will pay for:
1.Removal of roadway fill and hot mix above existing concrete decks in accordance with Section
202;
2.sealers applied to precast concrete elements in accordance with Section 612; and 3.concrete patching and repair in accordance with Section 628. ITEM DESCRIPTION UNIT 613000 EPOXY CONCRETE SEALER SF 613001 SILICONE-BASED ACRYLIC CONCRETE SEALER SF 613002 SILANE-BASED CONCRETE SEALER SF 613003 HIGH MOLECULAR WEIGHT METHACRYLATE CONCRETE SEALER SF 613004 WATERPROOFING MEMBRANE, TRAFFIC BEARING SF 613005 WATERPROOFING MEMBRANE, NON-TRAFFIC BEARING SF 613006 AESTHETIC STAINING SF
Referenced in this section
Sections that cite this one
Delaware revises spec sections through supplementals and new editions. We check this one every week and email you the day it changes. Free, no account.
Source: Delaware Standard Specifications for Road and Bridge Construction, 2026 Edition. Pages 269–0 of 786.
View official source ↗