Professional Service Industries, Inc.

Professional Service Industries conducted tests of BioSeal Concrete Sealer beginning in March of 1992. The tests conducted include compressive and flexural strength, penetration, carbonation, and freeze thaw. Cores taken from an 85 year old building; blocks, cubes and rectangles of concrete were subjected to an assortment of tests.

One core of concrete taken from an 85 year old building measured 850 pounds per square inch (psi) compression strength, a second core from the same building measured 2520 psi after being treated with BioSeal Concrete Sealer . That is 196% increase in compression strength. A similar pair or cores from this building were tested a few months later exhibiting a 121% increase in compression strength.

The laboratory tested high strength cubes of concrete which produced a 24% increase in compression strength (6120 to 8060 psi). The 6120 psi cube of concrete would be much less porous than the 650 psi core from the 85 year old building, and as BioSeal Concrete Sealer is a penetrating solution, there are fewer pores for the sealant to fill and less of an increase in compression strength.

The lab has completed two penetration tests and determines a depth of 8.5 inches in a 2280 psi rectangle of concrete, while a 3 inch diameter, 3630 psi cylinder is shown to have been completely penetrated by BioSeal Concrete Sealer .

Three samples of concrete exhibit an average 19.8% increase in compression strength from 3400 psi, while a further three samples show a 23.8% increase in flexural strength.
A cubed sample of concrete has increased in compression strength by 28.8% and 28.3% increase in flexural strength.

Resistance to the destructive effects of carbonation is tested. Two untreated samples of concrete are tested to reveal 0.57 and 0.63 inch penetration of CO₂. Two samples of concrete converted by the use of BioSeal Concrete Sealer have no depth of penetration of CO₂.

Professional Services laboratory also tested the effects of freeze thaw on untreated and converted concrete. A 4200 psi sample of concrete was subjected to 300 cycles of freeze thaw. The untreated sample is recorded to have completely deteriorated, while a sample converted with BioSeal Concrete Sealer shows “no effect”.