Description

OLV4900 Neutral Low Modulus Weatherproofing Silicone Sealant is a one-component neutral oxime curing silicone 

sealant with excellent adhesion, weatherability and elasticity for weather sealing in curtain wall 

and building facades, especially suits applications in the areas with large difference in temperature 

and low humidity. It easily extrudes in any weather and quickly cures at room temperature by 

reaction with moisture in the air to form a durable silicone rubber seal. 

Main Purposes

1. For weatherproofing sealing nonstructural curtain wall joints, facade joints and system; 

2. Weather sealing in metal (not including copper), glass, stone, aluminium panel, and plastic; 

3. Excellent adhesion to most common building material. 

Characteristics

1. One-component, neutral-cured with excellent adhesion, weatherability and elasticity for 

weather sealing in curtainwall and building facades; 

2. Excellent weatherability and high resistance to ultraviolet radiation, heat and humidity, ozone 

and temperature extremes; 

3. With good adhesion and compatibility with most building material; 

4. Remain flexible over a temperature range of -400C to 1500C.

Application

1. Clean with solvents such as toluene or acetone to keep the substrate surfaces completely clean 

and dry; 

2. For better appearance cover outside of joint areas with masking taps before application; 

3. Cut nozzle to desired size and extrudes sealant to joint areas; 

4. Tool immediately after sealant application and remove masking tape before sealant skins.

Limitations

1. Unsuitable for curtain wall structural adhesive; 

2. Unsuitable for the airproof location, because it is required to absorb moisture in air to cure for 

the sealant; 

3. Unsuitable for the frosty or moist surface; 

4. Unsuitable for the continually soggy place; 

5. Can’t be used if the temperature is below 4°C or above 50°C on the surface of the material.

Technology Data

The following data are only for reference purpose, not intended for use in preparing specification.