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P. 05 GE - Advanced Materials
SilPruf* SCS2000 silcone sealant & adhesive
Applicable Standards
SilPruf SCS2000 sealant & adhesive meets or exceeds the require-
ments of the following specifications:
American Society for Testing & Materials International
• ASTM C920 Standard Specification for Elastomeric Joint Sealants;
Type S, Grade NS, Class 50, Use A, G, M, O
• ASTM C1184 Standard Specification for Structural Silicone
Sealants;
Type S, Use G & O
U.S. Federal Specifications:
(widely referenced but cancelled Sept. 1996)
• TT-S-001543A Sealing Compound: Silicone Rubber Base (for
Caulking, Sealing & Glazing in Buildings and Other Structures)
• TT-S-00230C Sealing Compound: Elastomeric Type, Single
Component (for Caulking, Sealing & Glazing in Buildings and
Other Structures)
Canadian General Standards Board (currently inactive)
CGSB-19.13-M87 Sealing Compound, One-Component, Elastomeric,
Chemical Curing
SilPruf SCS2000 sealant & adhesive
carries SWR Institute validation
@ ±50% movement.
Suggested References
In addition to the guidelines provided on this datasheet,
GE - Silicones recommends that designers and users of SilPruf
SCS2000 sealant & adhesive familiarize themselves with the latest
editions of following industry guidelines and best practices:
1.) ASTM C1193 Standard Guide for Use of Joint Sealants.
2.) ASTM C1481 Standard Guide for Use of Joint Sealants with
Exterior Insulation & Finish Systems (EIFS).
3.) ASTM C1472 Standard Guide for Calculating Movement and
Other Effects When Establishing Sealant Joint Width.
4.) ASTM C1401 Standard Guide for Structural Sealant Glazing
5.) SWR Institute’s Applying Liquid Sealants Applicator Training
Program.
Joint Designs and Dimensions - WEATHERSEALING
Joint Movement - The dimensions of joints in typical construction
applications change daily as a result of solar heat gain and build-
ing sway, and throughout the year due to seasonal changes. The
movement in a sealant bead installed on the sun-side of a building
or during the hottest portion of the day will be almost entirely in
extension during the cold season or cycle; while the movement of a
bead installed during the coldest condition will be almost entirely in
compression during the hotter season or cycle. In addition to these
above movements, the designer should consider the effect of con-
struction tolerances in his/her project to minimize the occurrence
of over-sized or under-sized joints during construction. All moving
(dynamic) joints must be designed so as not to allow three-sided
adhesion of the sealant to occur (reference ASTM C1193). Three-
sided adhesion hinders the ability of the sealant to extend and
compress freely as desired and can lead to early joint failure.
Joint Width - When using SilPruf SCS2000 sealant & adhesive, the
designed joint width must be at least twice the total anticipated
joint movement. For example, if the total anticipated movement
in an expansion joint in which SilPruf SCS2000 sealant & adhesive
is to be installed is
1
/4”, the designed joint width must be at least
1
/2”. The designer may want to consider additional width to
accommodate construction tolerances (reference ASTM C1472).
Large panels or lites should allow a minimum width of
1
/4” for the
sealant bead, mostly to allow for a proper installation (very small/
narrow beads become difficult to install and can accommodate
less movement). Glazing of plastic or larger-sized metal panels may
require larger than usual joint widths due to the greater movement
potential (higher coefficients of thermal expansion). Consult with
GE - Silicones Technical Services for recommendations on large or
unusual applications.