Quick-Start Operating Guide
USP 797 Modular Cleanroom
©
Copyright 2015 Terra Universal Inc. All rights reserved. • Revised Dec 2019 • Document No. 1800-90
Terra Universal, Inc. • TerraUniversal.com • 800 S. Raymond Ave. • Fullerton, CA 92831 • TEL: (714) 578-6000 • FAX: (714) 578-6020
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Adhesive residue should be thoroughly cleaned prior to leaving the job site. Remove latex-based adhesive with warm
water and a clean non-abrasive cotton cloth. If necessary, use a mild, non-abrasive detergent. For best results,
change water and cleaning rags frequently. For cleanup with solvent based adhesives, use mineral spirits or acetone
to remove residue.
Sealant Application
Surfaces must be free of any dust, oil or grease. Clean seams as necessary with a dry lint free rag or a rag
dampened with solvent if necessary. Prior to dispensing urethane sealant each seam will need to receive thin
painter’s tape (3.5mil or 0.09mm, typically red or green) on each side of the seam. If the panel has a pre-applied tack
film, that can be left in place.
A minimum of two operators is recommended. If
one operator is used then each seam will have to
processed individually (filled and then smoothed by
the same operator before moving on to the next
seam); a new mix tip will likely be needed for each
seam in this case. With multiple operators, one
operator can dispense while a second can follow
and smooth seams. Care will need to be taken to
ensure the open time of the material is not
exceeded in either scenario. Smoothing must occur
within the open time of the sealant. After smoothing
remove painter’s tape. Any excess adhesive on
panels can be cleaned using a solvent dampened rag.
Open time is the amount of time from when the sealant begins to travel down the mix
tip until dispensed. It is important to note that open time begins at initial mix, not at
time of dispense on to the surface of the application. Product needs to be completely
worked in the seam. Operators will also need to be aware of the timing in regards to
the material remaining in the mix tip after each application. Material will either need to be purged every 2-3 minutes
between uses or a new mix tip applied at the re-start of a partial cartridge.
Sealant Workability Time (Open Time)
Ti
m
e (
m
in
ut
es)
Temperature (°F)
°70
°80
°90
°100
1
2
3
4
5
6
7
8
9
10
Workable
Suspect
Not Workable
