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Description
GP-713 is intended for use as a gypsum board sizing agent. Treatment of the top ply with diluted GP-713 provides a cured siloxane intercoat which improves bonding of the gypsum core and paper, as well as intra-ply paper strength.
GP-713 treatment also improves water repellency of finished gypsum board, allowing use in exterior applications where moisture or high humidity conditions exist. GP-713 contains a curable, modified silicone copolymer, along with non-ionic surfactants in a stable oil in water type emulsion. Both the concentrate and dilutions in water at various concentrations show excellent stability.
| Typical Properties | |
|---|---|
| Appearance |
White, Opaque Liquid
|
| Weight/Gallon @ 25°C |
8.0 lbs
|
| pH |
9.0
|
| Emulsifier Type |
Nonionic
|
| Specific Gravity |
1
|
| Wt. % Silicone |
40%
|
| Flash Point (P.M.C.C.) |
Will Not Flash
|
| Diluent |
Water
|
Applications
GP-713 is formulated to impart good water repellency on gypsum paper when diluted to 0.5 to 0.8 percent solids, from as supplied approximately 44% solids. Application to paper should be at 1 to 2 lbs solids per 100,000 square feet. Coating methods on paper may include flooding, spraying or rolling.
Curing of applied coatings may be accelerated by heating or by the addition of suitable catalysts such as zirconium acetate.
Processing and Safety Guidelines
Avoid contact with skin and eyes. Refer to Safety Data Sheet for safety precautions.
Packaging/Handling/Storage
GP-713 is supplied in 5-gallon (40 lbs.) pails, 55-gallon (440 lbs.) drums and 330-gallon (2640 lbs.) totes. Do not freeze. Do not store above 100º F.