Cures , Sealers

Densifiers & Crystal

Technology

Ultimate / Proven

Concrete Protection

IF USED

CORRECTELY AND

IN THE RIGHT

PLACES

What is a Curing Membrane?

• Aids in the development of the designed strength– Retains water in the concrete to promote proper

cement hydration

• Helps minimize unwanted cracking – Surface Cracking

– Shrinkage Cracking

• Minimizes discoloration – Minimize water carrying impurities to the surface

• Provides a barrier to minimize early stages of carbonation – Reduces or Eliminates Carbon dioxide infiltration

What is a Acrylic Sealer?

• Protects against contamination

– Film forming layer on surface

• Protect against abrasion

– Protection layer on the surface

• Protect against chemical attack

– Chemical resistant resins

• Visually enhances the substrate

– Reflects light

• Increase slip resistance

– With slip resistant additives

Water-borne Cures

and Sealers

Water-borne Cures and Sealers

• Water, solvent and solids

(acrylic, urethane, epoxy)

– Solvent = 1%-10% of the total weight

• High level of surface tension

– More difficult to penetrate tight surfaces

• Temperature and moisture sensitive

– Ambient, material and surface

• Multiple thin applications required

How do they work?

Water

Co-Solvent Acrylic

Main Components

Water-Borne Materials

Evaporation

Slow Evaporation

Water Co-Solvent Acrylic

Water-Borne Materials

Evaporation

Co-Solvent amount becomes greater than the Water and starts to

dissolve the Acrylic

Water Co-Solvent Acrylic

Water-Borne Materials

Evaporation

The Co-Solvent dissolves the Acrylic to produce an emulsion (liquid)

Water Co-Solvent Acrylic Emulsion

Water-Borne Materials

Water Evaporation

CONCRETE

Water-Borne Materials

Co-Solvent Evaporation

CONCRETE

Water-Borne Sealers

All of the Co-Solvent has evaporated

and a film has been developed

CONCRETE

Acrylic Film

Solvent-borne Cures

and Sealers

What are VOC’s?

• A. Volatile Organic Compound (VOC)

– a. Used to dissolve the acrylic/urethane

– b. Laws do not only relate to manufacturers

but Specifiers and Contractors are held

accountable if caught using non-approved

products

• Measured in grams per liter

• Density of the Solids compared to the

density of the solvent

Volatile Organic Content

• California

– 2005 VOC limit 250 grams/liter

– Current VOC limit 100 grams/liter

• Not all solvents are equal

• Most equate VOC level to solvent-borne

only. Water-borne sealers have a

measurable solvent content.

Volatile Organic Content• Exempt Solvents

– Acetone

• Flash point -1 F

– Oxsol 100

• Flash Pint 109°F

– Tertiary Butyl Acetate

• Flash point of 40 F

• Not approved (non-exempt) in CA but can be used

on the East Coast (New England States, PA, OH)

Solvent-borne Cures and Sealers

• Solvent and solids

(acrylic, epoxy or urethane)

– Solvent – 40% - 75% of weight

• Lower level of surface tension

– Easier to penetrate a tight surface

• Less temperature and moisture

sensitive

– Ambient, material and surface

• Multiple thin applications for best

performance

Solvent-Borne Materials

Main Components

Solvent Acrylic

Solvent-Borne Materials

The solvent dissolves the Acrylic

Solvent Acrylic

Solvent-Borne Materials

Solvent Acrylic/Solvent Emulsion

Solvent-Borne Materials

Solvent Evaporation

CONCRETE

Acrylic Emulsion

Solvent-Borne Materials

All of the Solvent has evaporated

and a film has developed

CONCRETE

Acrylic Film

Clear Acrylic Sealers

• Are Both Water and Solvent-borne

• Offers a level of protection

• Enhances color

– Water-borne provides a more natural appearance

– Solvent-borne provides a deeper color reflection

Where to Use

• Cure and Seal

• Integral Color and conventional concrete

• Imprinted, broom, swirl, and float finish

• Streetscapes, driveways, sidewalks and

interior floors

• Interior floors must be maintained

Liquid Chemical

Concrete Hardeners

Liquid Chemical Hardeners

• Reacts with chemicals in the concrete

• Develops a crystalline gel that fills the concrete pores

• Chemical Types– Sodium

– Potassium

– Lithium

– Magnesium Fluorosilicate

Silicates vs. Siliconates

• Silicates need to penetrate into the substrate to chemically react and then harden

• Siliconates need to be exposedto the atmosphere to react with carbon dioxide to develop a silicone resin

Where to Use

• Interior or exterior concrete

• Increased abrasion resistance

• Potential dusting issues

• Warehouses, lobbies, schools, churches

• Integral Colored, Dry Shake Color

Hardeners

• Ground and polished surfaces

Ground and Polished Concrete

• Reduce diamond wear

– Apply prior to using resin bond diamonds

• Develop shine sooner

– Increased hardness will minimize unwanted

scratch pattern

• Increase surface density

– Minimize liquids from penetrating / Dyes

• Increase surface durability and retain

shine longer

Penetrating Sealers

Penetrating Sealers

• Silanes & Siloxanes

• Penetrating – invisible

• No color enhancement

• Water-borne ( with co-solvent)

• Water and/or oil repellant

• Roller or pump sprayer

Basics of How they Work• Increase surface tension of the concrete

pores

• Water will bead on the surface

• Allows vapor to transmit through

• Lower cost protection

• Need to be re-applied

• Visually non-existent

• Non-film forming

– Will not increase abrasion resistance

Treated Untreated

Where to Use

• Water and oil protection

• Parking lots

• Masonry

• Vertical or horizontal applications

• Bridges

Advanced / Penetrating

Crystalline Products

(Growth Crystals)

Crystalline Products (Growth

Crystals)• Interior or exterior

• Outstanding long lasting protection

• Superior interior vapor mitigation

• Superior exterior protection against salt,

mag. DOT de-ice brines.

• Broomed or hard troweled concrete

• NO VOC’s

Dubuque Bridge

Crystalline Products

(Growth Crystals)• Crystal Growth liquid applied products protect,

preserve and permanently waterproof concrete or

masonry substrates without any film formation or

color change to the substrate.

• Crystal Growth liquid applied products are odorless,

colorless, a clear water based liquid with very low

viscosity, allowing it to penetrate deeply into any

concrete or masonry substrate.

• Crystal Growth liquid applied products are a water

based product group which contain no VOCs.

Keosauqua Bridge Application

Application Over Waterways Without The Costly and Time Consuming Expense of Bridge Encapsulation

and Containment

West Des Moines Bridge

WDM Bridge Application

Crystalline Products

(Growth Crystals)

• Eliminates Moisture Transmission through the Concrete Matrix

• Protects:

– Concrete against Freeze-Thaw Spalling

– Steel from Corrosion

– Chemicals

• Reduces:

– Water Penetration from the Surface

– Surface Scaling

– Alkali Silica Reactions (ASR)

– Maintenance (due to enhanced moisture protection)

Concrete Parking Lots

Untreated / Treated

Permanent Protection

• Seals hairline cracks up to one 16th inches in width

• Seals inner surface of large cracks preventing water from causing further damage

• Increases the adhesion property of repairing materials to concrete in the repaired cracks

PROTECTION ZONE REPAIRED CRACK

Hygroscopic & Hydrophilic

Characteristics of Crystals

Dry Conditions Wet Conditions

EVAPORATION ABSORPTION

Crystals

Shrinkage

Hydrophilic

Crystals

Expansion

Hygroscopic

Crystals Growth Towards

Moisture

5/23/11

5/23/11

6/6/12

9/20/12

12/22/12

2/11/13

Common Sealer

Issues

Line Saver

Saw Cutting Contamination

Na or K Silicate

Sealer Whiting

WASH IT …..DON’T STRIP IT

Sealer Whiting

WATER VAPOR or CONTAMINATION

Poor Surface Preparation

General Rules During Selection

• Less maintenance on the floor, higher

durability factor for the sealer

• VOC Content

• Future Maintenance cost / Re-application?

• Moisture vapor & relative humidity

• Gloss level

• Cure time

General Rules During Selection

• General concrete use

• Cost

• Interior or Exterior

• Surface finish

• Contractor product knowledge

• Project timeline (certain products

cannot be pushed)

QUESTIONS?

Thank youMark Chew

Specialty Division Manager

Logan Contractor Supply

641-757-2555