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CONFIDENTIAL
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TECHNICAL REPORT NO. 167
^Investigation No. 1 - Progress Report No. 1
FOR:
Mr. G. E. Wilson Mr. E. B. Hollingsworth Mr. T. W. Richards Mr. A. T. Niebergall Mr. 0. E. Burch
Mr. D. C. Corkll Mr. J. B. Moss Mr. G. F. Fowler File (2)
Issued by: Tigard Lab
Division: Gypsum
Written by:
0Approved by:
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Date: January 17, 1975
COMPETITIVE JOINT CEMENT PRODUCTS
Introduction: Drywall joint cements are shipped as powders that are mixed with water by the applicator and as pastes that are pre-mlxed with water by the joint cement manufacturer.
Sampling: The products included in this investigation are competitive products that are said to be equal or superior to the G-P products in their respective market areas.
Testing: Each product was subjected to the battery of tests that we use in all new formulation work.
Conclusions: The overall performance of the two G-P products tested can be judged as competitive with competition. All of the products tested gave
PLAINTIFF'S EXHIBIT
GP-194
TECHNICAL REPORT NO. 167 Investigation No. 1 Progress Report No. 1
Page 2
some Indication of not being competitive in certain categories. The following tables indicate what these weaknesses are in direct comparT&tfn to the other products. It should be noted that in the tables, sanding is noted as a number. The higher the number, the easier the product is to sand.
CONFIDENTIAL PROPRIETARY
proprietary
CONFIDENTIAL
BAG PRODUCTS Location
T.C Bond8: Room (70F 50% RH) Humid (95F 90% RH) Cold (40F 75% RH)
Corner Bead Bond
Contains Asbestos
Filler
Sanding Open Time Water Resistance Cracking Adhesive
Working Properties
Comments
U.S.G. N.V. Topping
Columbus
65
G-P Vinyl Topping
Chicago
53
100% 20%
100%
100% 100% 100%
O
Good
Good
No No
Limestone
Limestone
79 103
30-35 mins.
35 mins.
OK Good
Excellent
Excellent
Vinyl
Vinyl
Very good
Very good
Not as smooth as G-P product
r- - -- - -
READY MIX PRODUCTS
Location Viscosity Bonds: Room (70F 507. RH) Humid (95F 907. RH) Cold (40F 757. RH) Corner Bead Bond Contains Asbestos Water Resistance Filler .Sanding Open Time Density Lbs./Gal. Cracking Working Properties Comments
U.S.G All Purpose Ready Mix
Gold Bond All Purpose Ready Mix
G-P Ready Mix
Chicago
Baltimore
Chicago
790 650 620
1007. 757. 507.
OK Yes
OK Limestone 40 40 mins. 12.75 Good Very good
1007. 807. 40%
OK No OK Limestone 71 30 mins. 13.00 OK Excellent
1007. 1007. 1007. OK Yes OK Limestone 37 50 mins. 12.96 Fair Very good
Unusual Characteristics
Contains Kaolin Clay
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Kaiser Pre-Mix Topping .
U.S.G. Covercqat. -- it--
Baltimore
Chicage) ' ' .
t
Off scale
630
1007. 607. 507.
Poor No Good Limestone 59 35 mins. 13.85 OK Good Pockmarks
10051 1007. 100% OK Yes OK Limestone 34
45 mins. 13.12 OK Very good
Contains
Pigmented to
Diatomaceous increase
Earth
1 whiteness
CONFIDENTIAL
**OPRIBTARY