Page 16 - Penseal 244 100% Presentation

FROEHLING & ROBERTSON, INC.
Engineering Stability Since 1881

10626 York Road, Suites C-D
York Ridge Center North
Cockeysville, MD 21030
T 410-825-4131 I F 321-7384

November 3, 2015

Vexcon Chemicals, Inc
7240 State Road
Philadelphia, PA, 19135
Attn: Mr. Darryl Manuel

Re: Chloride Intrusion – NCHRP Report 244
Lab #: 75P0343-201501937
Sealer: Certi-Vex Penseal 244-100%

Darryl,

Three concrete specimens were cast for chloride intrusion testing in general accordance with the
procedures outlined in NCHRP Report 244. The first concrete specimen was designated as the control
specimen with no sealer applied to it. The other two specimens had the Certi-Vex Penseal 244-100% sealer
applied to them. The first specimen was sealed, cured, and tested under normal lighting conditions. The
second specimen was sealed, cured, and tested under the direct exposure of a UV light.

Certi-Vex Penseal 244-100% was applied to the two test specimens at the coverage rate of 250 sq ft/gal
outlined in the provided product description. The sealer was applied with a brush which was pre-saturated
with sealer prior to application to reduce errors due to retention of sealer on the brush.

Testing was started on specimens ten days after the application of the Certi-Vex Penseal 244-100%.
Specimens were exposed to a 15% aqueous solution of sodium chloride for a period of 21 days. At the end
of testing, the specimens were split. Concrete from underneath the surface was crushed to a #50 (300 µm)
sieve. The powder from each sample was then taken and analyzed for chloride ion content in accordance
with ASTM C1218. The chloride ion content of each of the two test specimens were compared to the
control specimen to determine the percent reduction of chloride penetration into the concrete. Water
absorption was also measured for the control specimen and each of the two coated specimens in general
accordance with the absorption after immersion procedure in ASTM C642. Following are the results of the
testing:

Report of Testing – NCHRP Report 244

Reduction of Chloride Water Loss
Chloride % by Weight Absorption %
Test Specimen Penetration into Reduction,
(ASTM C1218) by Weight
Concrete % by Weight
Control 0.0970 % -- 5.41 % --
Certi-Vex Penseal 244-100%
0.00217 % 97.8 % 0.31 % 94.2 %

Certi-Vex Penseal 244-100%
0.00210 % 97.8 % 0.33 % 93.9 %

Corporate HQ: 3015 Dumbarton Road Richmond, Virginia 23228 T 804.264.2701 F 804.264.1202 www.fandr.com

VIRGINIA • NORTH CAROLINA • SOUTH CAROLINA • MARYLAND • DISTRICT OF COLUMBIA

A Minority-Owned Business