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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PaintPRO Archives pg 1 of 2. This abstract is a brief summary of the referenced standard. All purpose sealant with average flexibility and adhesion Sealant selection is very much performance-based. Many are available in colors to match substrate, eliminating the need for painting. Currently, there is no ISO standard similar to this specification. They are easy to gun and because they v834 water-based, they clean up easily. Some must be applied to a primed surface, but in general they adhere well to a variety of surfaces.

Does the sealant need to be paintable or must it match the substrate?

They receive different ratings based on their ability to move, flex and return to their original configuration. Once cured, polyurethanes have limited paintability and may react with alkyd- or oil-based paints.

Because they are hard to remove completely, especially on porous surfaces, repairs and future painting can astmm difficult. New silicone may not stick to old silicone, so proper surface preparation is the key to successful sealant repairs where silicones have been used.

Is it an inside or outside application? Applying sealants to gaps and joints in construction projects takes more than a strong wrist and a steady hand. Answering these questions before you begin will help you select the best sealant for the zstm Typically, the higher the cost, the greater the performance you can expect. 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 use.

Answering these questions before you begin will help you select the best sealant f834 the job:. Their jelly-like consistency makes them hard to tool for a nice finish, but they cure quickly and will cure at below-freezing temperatures.


Unauthorized reproduction of any information on this site is a violation axtm existing copyright laws. 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.

Sealants, Caulks, Caulking Guns Selecting a sealant requires an understanding of the joint: How much joint c384 is required? What is the ambient and surface temperature at the time of application? These are the most common in the paint industry and come in a variety of formulations that affect cost, durability and adhesion. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

Every manufacturer of quality products tests their products and labels the astj tubes accordingly. Link to Active This link will always route to the current Active version of the 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. Even if the surface degrades with heavy traffic, the compound will still maintain an effective seal. The inch-pound in parenthesis are provided for information purposes aetm.

They shrink little while curing and can withstand traffic once cured. The following are the f834 and grade of sealant under this specification: Silicones are also reactive-curing compounds, but they offer easy gunning ability. 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 atm.

Historical Version s – view previous versions of standard. Select the proper sealant Painters can err by selecting the wrong type of sealant or expecting too much from it.

Successful gap-filling starts with selecting the right sealant for the job and continues with proper surface preparation and application.

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. It is essential, therefore, that the type and grade be specified for proper description of a sealant.


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. Sealant types Generally, caulks and sealants are members of one of the following types of chemical families.

C34 acrylics are paintable, and no primer is needed before application.

ASTM C – 17 Standard Specification for Latex Sealants

They tend to be more expensive than other types of sealants. 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. It should be recognized by zstm user that not all sealants meeting this specification are suitable for all applications and all substrates.

This standard does not purport to address all of the safety concerns, if any, associated with its use. What is the substrate?

Choices must be made after considering the amount of expansion and contraction the asmt will experience at the extreme temperature ranges of the area.

This specification covers latex sealants used for sealing joints in building construction. Sealants are tested to federal specifications or standards set by ASTM. Selecting a sealant requires an understanding of the joint: Test methods relate to special standard substrates of glass, wood and aluminum. Norman Efros Manufacturer Profile: Once cured, they are very flexible, extremely durable and resist ultraviolet light degradation.

If tests are required using substrates in addition to or other than standard, they should be so specified for testing. Other articles in this issue: