Blue RTV Silicone Sealant 1959

Product Description

BLUE SEAL is a 100% RTV silicone sealant that is excellent for a wide range of industrial sealing and adhesive applications. It is a non-slump, paste-like, one-component RTV that cures at room temperature by reacting with moisture in the air to produce a durable, flexible silicone rubber. Retaining its design properties, this product will not sag or shrink even after years of exposure. It is resistant to sunlight, rain, sleet, snow, UV, light, ozone and temperature extremes. Seals will remain watertight and weatherproof. It can be used in binding applications as a space filling rubber adhesive or formed in place gaskets. Pressurized packaging eliminates the need for a caulking gun.

Product Features

  • 100% RTV silicone
  • Industrial strength
  • Remains permanently flexible
  • Temperature range -76°F to 300°F, intermittently up to 400°F
  • Easy to use
  • Will not shrink or sag
  • When fully cured and washed, meets USDA standards


  • Sunroofs
  • Valve Covers
  • Forklifts
  • Doors & Windows
  • Electrical Connections
  • Rubber
  • Ceramic
  • Plumbing Fixtures
  • Equipment
  • Compressors
  • Equipment Housing
  • Crevices

Product Properties


Method Test Unit Result
As Supplied
ASTM C 679 Tack-free time at 25°C (77°F), 50% RH

Tooling time





ASTM C 639 Flow, sag or slump Nil
As Cured – 7 days at 25°C (77°F) and 50% RH
ASTM D 2240 Durometer Hardness, Shore A Points 26
ASTM D 412 Ultimate tensile strength psi (MPa) 310 (2.1)
ASTM D 624 Tear strength ppi (kN/m) 22 (3.9)
ASTM C 794 Peel strength pli (kN/m) 22 (3.9)
ASTM C 603 Extrusion rate g/min 370

Directions for Use

Clean and dry surface.  Remove oil, grease, or soap from surface.  Hold nozzle at 45° angle and apply in any direction.  Sealant normally skins over in 5 minutes and dries tack-free to the touch in one hour.  Sealant cures and bonds fully in 24 hours and maximum strength is achieved in seven days. 

Note: This product is not resistant to gasoline. Do not use for head gaskets.

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