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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Other articles in this issue: Applying sealants to gaps and joints in construction projects takes more than a strong wrist and a steady hand. Typically, the higher the cost, the greater the performance you can expect.

ASTM C – 05 Standard Specification for Latex Sealants

Even if the surface degrades with heavy traffic, the compound will still maintain an effective seal. Does the sealant need to be paintable or must it match the substrate?

Norman Efros Manufacturer Profile: Select the proper sealant Painters can err by selecting the wrong type of sealant or expecting too much from it. Sealant types Generally, caulks and sealants are members of one of the following types of chemical families. It should be recognized by the user that not all sealants meeting this specification are suitable for all applications and all substrates. Many aastm available in colors to match substrate, eliminating the need for painting.

Sealants, Caulks, Caulking Guns Selecting a sealant requires an understanding of the joint: It is essential, therefore, that the type and grade be specified for proper description of a sealant.

Like any aastm, each has strong points, weak points and idiosyncrasies that can make it a very good — or very poor — match for the job at hand.


Because they are hard to remove completely, especially on porous surfaces, repairs and future painting can be difficult. They receive different ratings based on their ability to move, flex and return to their original configuration. The physical properties of the sealant shall conform to the specified requirements according to type and grade. If tests are required using substrates in addition to or other than standard, they should be so specified for testing.

Silicones are also reactive-curing compounds, but they offer easy gunning ability. Every manufacturer of quality products tests their products and labels the caulk tubes accordingly. They maintain their properties over a wide temperature range.

This abstract is a brief summary of the referenced standard. Sealant selection is very much performance-based.

Some must be applied to a primed surface, but in general they adhere well to a variety of surfaces. It is the x834 of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

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. Selecting a sealant requires an understanding of the joint: Unauthorized reproduction of any information on this site is a violation of existing copyright laws. Is this an above — or below-ground application? The inch-pound in parenthesis are provided for information purposes only.

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. C8834 does not give any warranty express or implied asgm make any representation that the contents of this abstract are accurate, complete or up to date.


These are the most common in the paint industry and come in a variety of formulations that affect cost, durability atm adhesion. Choices must be made after considering the amount of expansion and contraction the joint will experience at the extreme temperature ranges of the area.

How much joint movement is required? All purpose sealant with average flexibility and adhesion Sealant selection is very ashm performance-based.

Answering these questions before you begin will help you select the best sealant for the job:.

Sealants, Caulks, Caulking Guns – PaintPRO

All acrylics are paintable, and no primer is needed before application. This specification covers latex sealants used for sealing joints in building construction. The following are the type and grade of sealant under this specification: They are easy to gun and because they are water-based, they clean up easily.

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. Currently, there is no ISO standard similar to this specification.

The sealant shall be composed of aztm formulated with appropriate fillers, pigments, and chemical additives.

Product Specifications

What is the substrate? Is it an inside or outside application?

Link to Active This link zstm always route to the current Active version of the standard. The following tests shall be done: Their jelly-like consistency makes them hard to tool for a nice finish, but they cure quickly and will cure at below-freezing temperatures. Sealants are tested to federal specifications or standards set by ASTM.