ASTM C Standard Specification for Latex Sealants. ASTM C This standard covers latex sealants used for sealing joints in building construction. The following are tests done within this standard: extrudability. Meets ASTM-C 40 Year Durability. Product Description: Paintable. SIITex 40 Siliconized Acrylic Latex Caulk is a white caulking. Mildew Resistant compound.

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Atsm maintain their properties over a wide temperature range. Answering these questions before you begin will help you select the best sealant for the job:. This specification covers latex sealants used for sealing joints in building construction.

Other articles in this issue: It should be recognized by the user that not all sealants meeting this specification are suitable for all applications and all substrates. Because they are hard to remove completely, especially on porous surfaces, repairs and future painting can be difficult. All purpose sealant with average flexibility and adhesion Sealant selection is very much performance-based. Like any family, each has strong points, weak points and idiosyncrasies that can make it a very good — or very poor — match for the job at hand.

Successful gap-filling starts with selecting the right sealant for the job and continues with proper surface preparation and application. This abstract is a brief summary of the referenced standard. Asmt sealant shall be composed of latex formulated with appropriate fillers, pigments, and chemical additives.

What is the substrate? While these reactive- or chemical-curing compounds are difficult to gun and tool and require solvent cleanup, they have excellent flexibility and have good to excellent durability. Select the proper sealant Painters can err by selecting the wrong type of sealant or expecting too much from it. If tests are required using substrates in addition to or other than standard, they should be so specified for testing.


It is essential, therefore, that the type and grade be specified for proper description of a sealant. The physical properties of the sealant shall conform to the specified requirements according to type and grade. They are low in cost and come in a wide range of performance grades. Once cured, they are very flexible, extremely durable and resist ultraviolet light degradation. Sealants used in commercial construction may be specified by the owner, architect or engineer; however, the contractor often has final say on brand and type.

Selecting a sealant requires an understanding of the joint: This standard does not purport to address all of the safety concerns, if any, associated with its use.

Their jelly-like consistency makes them hard to tool for a nice finish, but they cure quickly and will cure at below-freezing temperatures. They tend to be more expensive than other types of sealants. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to aatm.

Sealants, Caulks, Caulking Guns – PaintPRO

Silicones are also reactive-curing compounds, but they offer easy gunning ability. Even if the surface degrades with heavy traffic, the compound will still maintain an effective seal. Axtm are available in colors to match substrate, eliminating the need for painting. Urethane hybrid blended acrylics are at the high end of the acrylic family in cost and performance and can often be used in a variety of applications where a silicone or polyurethane sealant may be used.

Unauthorized reproduction of any information on this site is a violation of existing copyright laws. Is it an inside or outside application? Choices must be made after considering the amount of expansion and contraction the joint will experience at the extreme temperature ranges of the area. Applying sealants to gaps and joints in construction projects takes more than a strong wrist and a steady hand.


Once cured, polyurethanes have limited paintability and may react with alkyd- or oil-based paints. Some must be applied to a primed surface, but in general they adhere well to a variety of surfaces. These are the most common in the paint industry and come in a variety of formulations that affect cost, wstm and adhesion. Every manufacturer of quality products tests their products and labels the caulk tubes accordingly.

It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. Answering these questions before you begin will help you select the best sealant for the job: Link to Active This link will always route to the current Active version of the standard.

The inch-pound in parenthesis are provided for information purposes only. Norman Efros Manufacturer Sstm Historical Version s – view previous versions of standard.

Product Specifications

ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date. PaintPRO Archives pg 1 of 2.

They receive different ratings based on their ability to move, flex and return to their original configuration. The following are the type and grade of sealant under this specification: Test methods relate to special standard substrates of glass, wood and aluminum.

Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

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