USG ENVIRO-SHIELD Bonded Fiber Matrix Application Rates User Manual

Page 2

IG8477

Tank shall be clean. Mixing action shall be adequate to provide for full dispersion of materials. Hoses
can be used to extend range of spraying. To prevent set-up and excess cleaning, all equipment must be
flushed within 4 hours after mixing of plaster. All equipment including the sump, drain and recirculating
line shall be thoroughly flushed and cleaned between mixes. Please refer to your equipment
manufacturer for proper safety and application instructions.

Loading/Application Procedures:

1) To ensure proper application, area needs to be staked out prior to application to ensure the

correct poundage rate.

2) A two step application is recommended. Grading and seeding of soil before BFM is applied

will produce better germination results. One step applications depend on many
circumstances and USG denies any responsibility for lack of vegetation growth while using
ENVIRO-SHIELD™

3) It is not recommended to spray before, during or after rainfall such that the matrix will have

opportunity to dry for up to 24 hours after installation. Certain soil types and anticipated
heavy rainfalls may require re-application or heavier amount to initial spray coverage in order
to ensure maximum dust or erosion control.

4) Fill tank until water is above agitator axle.
5) Using the recommended application rate, determine the number of bags required to cover the

job site or to mix desired volume.

6) Turn agitator and recirculation valve on and begin loading material.
7) Continue to fill tank while loading BFM into tank.
8) ENVIRO-SHIELD™ should be completely loaded before water level reaches 90% of tank

capacity.

9) Top off with remaining water.
10) Mix until all fiber is fully broken apart and hydrated (minimum 5 minutes). Do not reach into

mixer while engaged.

11) Shut off recirculation valve, slow down agitator and start applying BFM with proper tip nozzle.
12) Apply ENVIRO-SHIELD™ to achieve a uniform sprayed in place blanket. This requires

complete coverage of a minimum of 1/8

inch (3mm) over the entire surface area. Typically

3500 to 4100 lbs. / acre needs to be applied (refer to “Typical Application Rates” in IG1683),
depending on the slope, soil and expected weather conditions. The BFM shall be applied
uniformly back and forth and from top of slope towards the bottom to alleviate “shadowing”,
provide more uniform coverage and to ensure 100% soil coverage. The BFM shall be placed
at least 18 inches beyond the lip or top of the slope. Tie the BFM to any existing vegetation.
The purpose of this procedure is to prevent water from getting underneath the BFM blanket
during rainfall.

13) Best results and fastest curing are achieved at temperatures exceeding 60

F (15

C). A

minimum day or night temperature for curing is 40

F (4

C).