June 2011

BECKOSOL AQ® 520 Product Code: 91888-00 Epoxy Modified Alkyd Latex

DESCRIPTION

® BECKOSOL AQ 520 is an epoxy modified alkyd latex designed for use in sealers for concrete and masonry products. BECKOSOL AQ 520 provides an easy to apply product for DIY and professional applicators to achieve a “wet look” to concrete paving products without adding gloss. APPLICATIONS • Concrete and masonry sealers FEATURES • Excellent “wet look” appearance • Low VOC, typical “wet look” formulation <100 g/L • Low odor • Low viscosity • Easy application properties TYPICAL PROPERTIES Appearance Milky liquid Percent Solids by Weight 51 Percent Solids by Volume 49.7 Viscosity, Brookfield, 50 RPM, #3 spindle 230 cps Pounds per Gallon 8.51 Pounds per Gallon, Solids 8.67 pH 8.3 Odor Mild Volatile Content (Percent) Water, n-propoxy propanol, Proprietary Surfactant,

(45.5%, 2.0%, 1.5%) STORAGE Store in a cool, dry place, preferably under 80° F to ensure a useful shelf life of at least six months. Protect from freezing. SAFETY Read the BECKOSOL AQ 520 Material Safety Data Sheet before handling, storing, or using this product.

BECKOSOL® AQ 520 Page 2

BECKOSOL® AQ 520 Clear Concrete “Wet Look” Sealer

Formula 4586-49

Formulation Raw Material #/100 Gal/100 Supplier

BECKOSOL AQ® 520 399.47 47.00

Cobalt Hydrocure II, 5% 2.04 0.27 (1)

Activ 8 0.45 0.06 (2)

NatureShield 40 11.50 1.44 (3)

BYK 093 2.52 0.29 (4) Deionized Water 424.40 50.95

Total 840.38 100.0

Thin as needed with deionized water to application viscosity

Suppliers:

(1) OMG – OM Group (2) R.T. Vanderbilt Co. (3) Michelman (4) BYK

Formulation Physicals NV by Weight 25.0 % NV by Volume 24.0% VOC (g/l) 69.8 Pounds per Gallon 8.40 pH 8.7 Viscosity, Stormer, KU 47.0 Viscosity, #2 Zahn, seconds 14.0

Coating Performance

Based on 7-Day Ambient Cure on Red Concrete Pavers

Darkening, ΔL compared to uncoated paver -6.5

Water Whitening 1 hour exposure No Whitening 4 hour exposure No Whitening

Water drop (1cc), to evaporation No Whitening

Water Absorption 1 cc water spot >7 hours Adhesion, based on 7-Day Ambient Cure on Unetched Concrete Adhesion, Patti Pull Test, Dry Concrete Pull-Off Strength, psi 835.8

Failure Mode 100% concrete failure

Chemical Resistance, tested on Cementitious Backer board, 24 Hour spot test. 72 hour recovery

Gasoline No Effect Engine Oil Slightly Darkened

Transmission Fluid Very Slightly Darkened

Sodium Hydroxide, 1N Very Slightly Darkened

Isopropanol No Effect Ethanol No Effect

Brake Fluid No Effect Antifreeze No Effect Bleach No Effect Hydrochloric Acid, 1N Stained Propylene Glycol Very Slightly

Darkened Salt Water, 5% solution No Effect

BECKOSOL® AQ 520 Page 3

QUV-A 340 Exposure (20 hours UV @ 60°C, 4 hours condensation @ 50°C)

Tested on Red Concrete Pavers

Beckosol AQ 520 “Wet Look” Sealer

Commercial Solventborne “Wet-

Look” Sealer

Commercial Waterborne “Wet-Look”

Sealer VOC, g/L 69.8 726.0 96.0 Initial Readings

1ΔL (compared to uncoated paver) -6.58 -6.97 -1.61

60° Gloss 0.5 0.4 0.8 After 1000 Hours Exposure

1ΔL (compared to uncoated paver) -1.03 -1.78 0.21

Recoatability Ease of recoating Easily recoats Easily recoats Easily recoats

1ΔL after recoat (compared to uncoated paver) -6.57 -5.67 0.24

1The larger the negative value the darker the appearance on the paver.

Microscopy of Coated Pavers 40X

Beckosol AQ 520

High Tg Latex (Poor wetting & coalescence)

Commercial “Wet Look” Waterborne Acrylic (Film formation on surface)

Commercial “Wet Look” Solventborne

Good “Wet Look” Appearance

Poor “Wet Look” Appearance