PRC-DESOTO PR 870B1/2

Harmonization Code : 3506.10.00.00 | Prepared glues and other prepared adhesives, not elsewhere specified or included; products suitable for use as glues or adhesives, put up for retail sale as glues or adhesives, not exceeding a net weight of 1 kg

PRC-DESOTO PR 870B1/2

Main features

  • Class B-1/2 Processing Window
  • Corrosion-Inhibitive Dissimilar-Metal Seal
  • High-Elongation Cured Seal

Product Description

PPG P/S 870 Class B-1/2 Corrosion-Inhibitive Sealant is a two-part, manganese-dioxide-cured polysulfide sealant for corrosion-barrier sealing of aluminum alloys and dissimilar-metal aerospace joints. The Class B-1/2 grade is a low-sag, thixotropic paste applied by extrusion gun or spatula and cured at room temperature. At 25 deg C and 50% RH, it provides a typical 0.5-hour application life, less than 4 hours to tack-free, and 9 hours to 30 Shore A hardness. The cured material has a typical Shore A hardness of 50, 358 psi tensile strength, and 400% elongation. Its service range is -54 to 121 deg C, with intermittent excursions to 135 deg C.

Key features

  • Class B-1/2 processing: A 0.5-hour application life is paired with less than 4 hours to tack-free at 25 deg C and 50% RH.
  • Corrosion-inhibitive joint seal: The polysulfide sealant forms a barrier on aluminum alloys and between dissimilar metals.
  • High-elongation cured seal: Typical cured elongation is 400% with 358 psi tensile strength.

Applications / Suitable for

  • Corrosion-barrier sealing of aluminum aerospace assemblies.
  • Sealing between dissimilar metals in aerospace assemblies.
  • Aerospace joints exposed to fuels and oils.
Product Family

PRC-DESOTO PR 870B1/2

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TDS, SDS & Technical Documents

Technical Specifications

General Properties
Component System
Describes the number of components that must be supplied, mixed, or activated before application or cure.
Two Part
Specific Gravity
Specific gravity (SG) is the ratio of the density of a substance to the density of a reference substance; equivalently, it is the ratio of the mass of a substance to the mass of a reference substance for the same given volume. For liquids, the reference substance is almost always water (1), while for gases, it is air (1.18) at room temperature. Specific gravity is unitless.
1.48
Thermal Properties
Service temperature
-54 to 121 °C
Mechanical Properties
Elongation
Elongation is the process of lengthening something. It is a percentage that measures the initial, unstressed, length compared to the length of the material right before it breaks. It is commonly referred to as Ultimate Elongation or Tensile Elongation at break.
400 %

Additional Information

Technical properties

As supplied / before processing

Values apply to the Class B-1/2 grade unless otherwise stated.

Property Value Unit Method / condition
Part A / Part B colorBlack / White-As supplied
Mixed colorGray-After mixing
Mix ratio by weight17:100-Part A to Part B
Base viscosity11,000 (1,100)Poise (Pa-s)Brookfield #7 at 2 rpm
Application life0.5hClass B-1/2 at 25 deg C, 50% RH
Tack-free time<4hClass B-1/2 at 25 deg C, 50% RH
Cure to 30 Shore A9hClass B-1/2 at 25 deg C, 50% RH
Storage lifeAt least 9monthsBelow 27 deg C in original unopened containers
Technical properties

After processing / final state

Values are typical and apply to the stated cure and test conditions.

Property Value Unit Method / condition
Cured specific gravity1.48-Cured 14 days at 25 deg C, 50% RH
Nonvolatile content95%Typical cured material
Ultimate cure hardness50Shore ACured 14 days at 25 deg C, 50% RH
Tensile strength358 (2,470)psi (kPa)Cured 14 days at 25 deg C, 50% RH
Elongation400%Cured 14 days at 25 deg C, 50% RH
Low-temperature flexibilityNo cracking-At -54 deg C
Service temperature range-54 to 121deg CIntermittent excursions up to 135 deg C

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