ASI 505



ASI 505 Self-Leveling RTV Silicone is a one-component, moisture cure, flowable material designed for a variety of potting, coating, sealing and waterproofing applications.

Once applied, ASI 505 will begin skinning in 8 minutes and continue curing to form a flexible, durable rubber that bonds well to a wide variety of substrates. ASI 505 will resist a wide temperature range (-70°F to 400°F) and will not degrade when used in exterior applications or under water. It is extremely UV resistant and will not shrink, crack or dry out long-term. ASI 505 Contains no solvents and is VOC compliant.


  • Acetoxy Cure RTV Silicone
  • Excellent Unprimed Adhesion
  • Resistant To UV Degradation & Weathering
  • Low Viscosity, Self-Leveling
  • One-Component, Moisture Curing
  • Withstands Temperatures Ranging From -70F° to 400° F
  • Fast Skinning

Physical properties

Physical PropertiesTest MethodResult
ViscosityASI Test Method35,000 cps (Spindle 7, 4 rpm)
Skin Formation TimeASI Test Method8 minutes (70°F, 50% RH)
DensityASTM D14758.5 lbs./gal
HardnessASTM C66130 (Shore A)
Extrusion RateASI Test MethodN/A
Tensile StrengthASTM D412330 psi
Elongation at BreakASTM D412350%
Lap ShearASTM D412N/A
Gun GradeASI Test MethodPass (Self-Leveling)
QUV TestingASTM G154Pass (10,000 hrs.)
Service TemperatureASI Test Method30°F to 400°F
Typical Cure RateASI Test Method24 hrs. (1/8" bead)

Strength will start to develop immediately and continue increasing for 7 days after application. ASI recommends testing strength and adhesion on the 7th day. ASI 505 suggested application temperature range: -30°F to 150°F.

Information on this data sheet can change without notice and it is therefore not recommened that these figures be used in spec writing. Ifyou have any questions contact manufacturer’s sales and technical service department.

Conforms / Meets / Exceeds

  • VOC Compliant (23 grams/liter ASTM D2369)

Common Substrates

  • Glass
  • Granite
  • Marble
  • Metal
  • Ceramic
  • Aluminum
  • Most Types Of Wood
  • Natural & Synthetic Fiber
  • Most Fiberglass
  • Most Painted Surfaces
  • Some Plastics

Common Applications

  • Sealing & Waterproofing Horizontal Joints
  • Coating Assemblies
  • RV & Manufactured Housing Applications

Speak with a sales engineer to discuss ASI 505 or any of our other products or manufacturing services! Use our contact form or call 800-325-7040 now.