Royal Sealants WS-8035 Class B is a rapid-cure and lightweight polysulfide sealant specifically formulated for fuel tank sealing applications in the space exploration industry. Its fast curing properties and low weight make it an ideal choice for ensuring secure and reliable seals in the demanding environment of space exploration.

Product Type: Sealant

Application Area: Aerospace Applications, Fuel Tank, Fuselage

Compatible Substrates & Surfaces: Composites, Metal, Plastics

Application Method: Extrusion, Spatula

Chemical Family: Polysulfides

Features: Fast Curing, High Temperature Resistance, Light Weight, Low Sagging, Low Shrinkage, Rapid Curing Speed, Room Temperature Curing, Thixotropic

Technical Data Sheet
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Enhanced TDS

Identification & Functionality

Features & Benefits

Labeling Claims
Ready-to-Use Product Features
Features and Benefits
  • Fast curing system significantly increasing productivity
  • Excellent thermal performance
  • Excellent elastomeric properties and strength retention after prolonged exposure to jet fuel, aviation gasoline, hydraulic fluids, oils and lubricants
  • Less than 1% linear shrinkage
  • Low VOC, eco-friendly sealant which reduces hazardous impact during installllation
  • Outstanding adhesion to multiple metals, composites, primers and coatings used in modern aircrafts

Applications & Uses

Markets
Applications
Application Area
Application Method
Compatible Substrates & Surfaces
Segment
Application Instructions
  • Clean the surface of substrates with appropriated cleaning solutions per specification(s) using an OEM approved lint- free cloth to remove, dirt, grease and processing oils just before the application of sealant. Pour solvent onto cloth to avoid contamination of solvent supply. Clean in small areas at a time. Wipe immediately after application to prevent redeposition of contaminants on the surface. Repeat at least three times or more if required. Use fresh wiping cloth every time! Substrate composition and surface characteristics can greatly vary, which can affect sealant adhesion. It is recommended to determine adhesion characteristics of specific substrates prior to application of sealant to get consistency.
  • Recommended Application: Fuel Tank Sealant

Properties

Physical Form
Appearance
Black Extrudable
Cured Properties
ValueUnitsTest Method / Conditions
Specific Gravity (Mixed)max. 1.1--
Non Volatile Contentmin. 97%-
Ultimate Hardness45 A-Shore A
Weight loss3.5%JRF VII and BMS3-11
Tensile Strength (standard Cure 14 days at 77°F)258psi-
Ultimate Elongation (42 days at 140°F)250%AMS2629
Service Temperature (continuous, operational range)(-)54 to 250°F-
Service Temperature (intermittent exposure)max. 360°F-
Low Temperature flexibility (no loss of adhesion or cracking)-65°F-
Volume Resistivity (tested at 10% RH)6 x 10⁹--
Uncured Properties
ValueUnitsTest Method / Conditions
Viscosity (Part A, Hardener)max. 3,000cPs-
Mix Ratio (Part A, Hardener)100vol%-
Mix Ratio (Part A, Hardener)100wt%-
Viscosity (Part B, Base)11,000 – 16,000cPs-
Mix Ratio (Part B, Base)7.06vol%-
Mix Ratio (Part B, Base)12wt%-
Viscosity (Mixed)3900cPs-
Cure Properties
Work Life B-2
Application Life (hrs) 2
Tack free time (hrs) <7
Cure time to 35 A Durometer (hrs) <8

 

Packaging & Availability

Regional Availability
  • Africa
  • Europe (Excluding Russia)
  • India
  • Middle East

Storage & Handling

Shelf Life
9 months (when stored below 80°F), 42 days (premixed and frozen material, when stored below temperatures of -40°F)
Storage and Shelf Life Information
  • The shelf life of WS-8035 Class B is 9 months from the date of manufacturing when stored below 80°F (27°C) in the original unopened container.
  • The storage life of premixed and frozen material (PMF) is a minimum of 42 days at or below temperatures of -40°F (-40°C).