ASI 335 Window & Door Sealant is a single component, nonslump, moisture curing neutral cure oxime silicone that cures to form a tough, non-corrosive, flexible rubber with outstanding resistance to weather & UV degradation.

ASI 335 Window & Door Sealant offers excellent adhesion without primer to vinyl, glass, aluminum, brick and a variety of other substrates (see list on back of TDS). It will not shrink, crack or pull away from substrates during curing because it is 100% silicone with outstanding physical properties including 35% joint movement. ASI 335 Window & Door Sealant will be easy & consistent to dispense over a wide range of temperatures because it does not contain any solvents or water.


  • Advanced Adhesion Properties To Construction Substrates
  • Extremely Resistant to UV Degradation & Weathering
  • Withstands Extreme Cold & Extreme Heat
  • 35% Joint Movement Capability
  • One-Component, Easy To Use Formulation
  • Cures To Form An Extremely Durable Rubber
  • Resists Extreme Temperatures & Chemicals
  • Easy to Extrude At Cold Temperatures
  • Mold & Mildew Resistant
  • Non-Slump, Can Use On Overhead & Vertical Applications
  • Excellent For Indoor & Outdoor Applications
  • Creates A Waterproof seal

Physical properties

Physical PropertiesTest MethodResult
ViscosityASI Test Method1,100,000 cps (Spindle 7, 4 rpm)
Skin Formation TimeASI Test Method20 minutes (70°F, 50% RH)
DensityASTM D14758.5 lbs./gal
HardnessASTM C66123 (Shore A)
Modulus 100%AST D4120.37 MPa
Tensile StrengthASTM D412260 psi
Elongation at BreakASTM D412560%
Application TemperatureASI Test Method-35°F to 150°F
Gun GradeASI Test MethodPass (Non-Slump)
QUV TestingASTM G154Pass (10,000 hrs.)
Service TemperatureASI Test Method-70°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 335WS suggested application temperature range: -35°F to 150 F. ASI 335WS can be used at temperatures higher than 400F for intermittent periods. Testing should be done to confirm temperature requirements are met.

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

Conforms / Meets / Exceeds

  • ASTM C920 Class 35, Type S, Grade NS, Use NT, G, A, O
  • TT-S-01543A
  • TT-S-00230-C
  • VOC Compliant (21 grams/liter ASTM D2369)
  • AAMA 802.3-10, Type |I Back Il Bedding Glazing Compound
  • AAMA 803.3-10, Spec For Narrow Joint Seam Sealers, Type 1
  • AMA 805.2-10, Spec For Back Bedding Glazing Compound, Group C

Common Substrates

  • Glass
  • Concrete, Brick, Mortar (Porous Substances)
  • Vinyl
  • Most Metals (Including Uncoated)
  • Most Wood Types, Cement Board & Fiber Board
  • Aluminum
  • Ceramic
  • Most Fiberglass
  • Most Painted Surfaces

Common Applications

  • Window Manufacturing & Assembly
  • Window Installation
  • Metal Roofing Installation
  • Door Installation, Manufacturing & Assembly
  • Sliding Installation & Sealing
  • Portable Housing & RV Applications
  • Glass Glazing
  • Construction Applications

For a complete list of applications & substrates or more product information, please contact us.

Speak with a sales engineer to discuss ASI 335WS or any of our other products or manufacturing services! Use our contact form or call 800-325-7040 now.