PRC-DESOTO PR 1775

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 1775

Main features

  • Non-Chromate Corrosion Barrier
  • Selectable Class B Work Life
  • Fuel-Exposed Elastomeric Seal

Product Description

PPG PR-1775 Class B Non-Chromate 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 uncured material is a low-sag, thixotropic paste applied by extrusion gun or spatula and cured at room temperature. Class B-1/2 and B-2 variants provide 0.5- and 2-hour application lives at 25 deg C and 50% RH. The cured sealant has a typical Shore A hardness of 51, 420% elongation, and a service range from -54 to 121 deg C, with recurring short exposures to 182 deg C. It retains elastomeric properties after exposure to jet fuel and aviation gasoline.

Key features

  • Non-chromate corrosion barrier: The sealant forms a corrosion-inhibitive barrier on aluminum alloys and between dissimilar metals.
  • Selectable Class B work life: B-1/2 and B-2 grades provide 0.5- and 2-hour application lives at 25 deg C and 50% RH.
  • Fuel-exposed elastomeric seal: The cured material retains elastomeric properties after exposure to jet fuel and aviation gasoline.

Applications / Suitable for

  • Corrosion-barrier sealing of aluminum aerospace assemblies.
  • Sealing between dissimilar metals in aerospace assemblies.
  • Aerospace joints exposed to jet fuel or aviation gasoline.
Product Family

PRC-DESOTO PR 1775

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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.
1.59
Thermal Properties
Service temperature
-54 to 121 °C
Other Properties
Storage Temperature
4.5 - 27 °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.
420 %

Additional Information

Technical properties

As supplied / before processing

Class B-1/2 and B-2 values are typical at 25 deg C and 50% RH.

Property Value Unit Method / condition
Part A / Part B colorBlack / White-As supplied
Mixed colorGray-After mixing
Mix ratio by weight12:100 / 10:100-B-1/2 / B-2; Part A to Part B
Base viscosity11,000 (1,100)Poise (Pa-s)Brookfield #7 at 2 rpm
Application life0.5 / 2hB-1/2 / B-2 at 25 deg C, 50% RH
Tack-free time<4 / <6hB-1/2 / B-2 at 25 deg C, 50% RH
Cure to 30 Shore A16 / 24hB-1/2 / B-2 at 25 deg C, 50% RH
Technical properties

After processing / final state

Values are typical after 14 days at 25 deg C and 50% RH unless otherwise stated.

Property Value Unit Method / condition
Cured specific gravity1.59-Cured 14 days at 25 deg C, 50% RH
Nonvolatile content94%Typical cured material
Ultimate cure hardness51Shore ACured 14 days at 25 deg C, 50% RH
Tensile strength495 (3,413)psi (kPa)Cured 14 days at 25 deg C, 50% RH
Elongation420%Cured 14 days at 25 deg C, 50% RH
Low-temperature flexibilityNo cracking-At -54 deg C
Service temperature range-54 to 121deg CShort recurring exposures up to 182 deg C

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