Dow 902 RCS Joint Sealant

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Description for Dow 902 RCS Joint Sealant

Rapid cure; high movement capability; seals irregular surfaces; good weatherability; all temperature gunnability.

Application Type	Bond, Repair, Sealant
1 Part or 2 Part	2 Part
Material Form	Liquid
Substrate	Carbon steel, Portland cement concrete surfaces, Polymer concrete, Steel, Concrete, Steel joint surfaces
Manufacturer	Dow
Chemistry	Silicone rubber
Cure Method	Part A/Part B
Cure Temperature (°C)	25
Cure Time (min)	Rapid, 480
Viscosity (cPs)	Self-leveling
High Temperature Resistance (°C)	149
Low Temperature Resistance (°C)	-45

Best Practices for Dow 902 RCS Joint Sealant

*See Terms of Use Below

Surface Preparation

joint be clean and dry.

See Vendor Technical Data Sheet for more info.
Application

Dow Corning 902 RCS Joint Sealant comes in kits consisting of two 20-fl oz E-Z Pak sausages: Part A (black) and Part B (white). With a dual sausage pneumatic gun (such as Model 635-1 supplied by Albion Engineering Co., Inc.1), load Parts A and B into the designated sides so that the crimped end is approximately 1/2 inch (13 mm) above the end of the cylinder. To open the sausage pak (see Figure 3), cut off the exposed crimped end of Part B. Repeat this step for Part A. Quickly attach the rear housing and static mixer. The materials are then dispensed at a predetermined ratio of 1:1 by volume through the static mixer and into the joint. The extruded material must be gray in color. Guidelines for the proper use of Dow Corning 902 RCS Joint Sealant include: The inlet air pressure to the gun should not exceed the gun manufacturer’s recommendation.

The recommended static mixer should have a minimum 1/2 inch (13 mm) inside diameter and sufficient mixing elements to give the desired color. An example of a typical static mixer that can be used is one that has a 12 inch (305 mm) long plastic shell by 1/2 inch (13 mm) inside diameter, with a minimum of 8 inches (203 mm) of mixing elements.

Prior to attaching the static mixer to the gun, dispense a small amount of material (A and B) to ensure the gun is dispensing both parts.

To continue using the same static mixer, do not allow elapsed time to exceed 5 minutes when changing kits. The mixer should not remain inactive for longer than 5 minutes.

See Vendor Technical Data Sheet for more info.

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Technical Data

Overview

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Specifications

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Best Practices

*See Terms of Use Below
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Comparable Materials

*See Terms of Use Below
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Questions? Learn more about Gluespec

Work / Pot Time	Test Method	Temperature
10 to 15 min	50 percent Relative Humidity	25°C
<20 min	50 percent Relative Humidity	25°C

Modulus	Test Method
Ultra-low	Modulus Test Method
3 to 12 (Joint (psi))	At 25°C (77°F) and 50 percent Relative Humidity

Dow 902 RCS Joint Sealant

Description for Dow 902 RCS Joint Sealant

Best Practices for Dow 902 RCS Joint Sealant

Surface Preparation