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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They maintain their properties over a wide temperature range. Historical Version s – view previous versions of standard. 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. What is the substrate? Typically, the higher the cost, the greater the performance you can expect. Link to Active This link will always route to the current Active version of the standard.

Currently, x834 is no ISO standard similar to this specification. Does the sealant need to be paintable or must it match astmm substrate?

Product Specifications

This abstract is a brief summary of the referenced standard. 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. Is it an inside or outside application? Test methods relate to special standard substrates of glass, wood and aluminum.

These are c8344 most common in the paint industry and come in a c8344 of formulations that affect cost, durability and adhesion.

Answering these questions before you begin will help you select the best sealant for the job:. Other articles in this issue: Some must be applied to a primed surface, but in general they adhere well to a variety of surfaces. 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.


The following are the type and grade of sealant under this specification: What is the ambient and surface temperature at the time of application? How much joint movement is required?

This specification covers latex sealants used for sealing joints in building construction. They are low in cost and come in a wide range of performance grades.

Select the proper sealant Painters can err by selecting the wrong type of sealant or expecting too much from it. The inch-pound in parenthesis are provided for information purposes only.

Because they are hard to remove completely, especially on porous surfaces, repairs and future painting can be difficult. They are easy to gun and because they are water-based, they clean up easily. They receive different ratings based on their ability to move, flex and return to their original configuration. 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.

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.

ASTM C – 17 Standard Specification for Latex 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 use. All acrylics are paintable, and no primer is needed before application.

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. All purpose sealant with average flexibility and adhesion Sealant selection is very much performance-based. Even if the surface degrades with heavy traffic, the compound will still asrm an effective seal. Applying sealants to gaps and joints in construction projects takes more than a strong wrist and a steady hand. Choices must be made after considering the amount of expansion and contraction the joint will experience at the extreme temperature ranges of the area.


New silicone may not stick to old silicone, so proper surface preparation is the satm to successful sealant repairs where silicones have been used.

ASTM C – 05 Standard Specification for Latex Sealants

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. Once cured, polyurethanes have limited paintability and may react c34 alkyd- or oil-based paints.

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

PaintPRO Archives pg 1 of 2. They shrink little while curing and can withstand traffic once cured. Sealants, Caulks, Caulking Guns Selecting a sealant requires an understanding of the joint: Silicones are also reactive-curing compounds, but they offer easy gunning ability.

Once cured, they are very flexible, extremely durable and resist ultraviolet light degradation. The sealant shall be composed of latex formulated with appropriate fillers, pigments, and chemical additives. The following tests shall be done: Every manufacturer of quality products tests their products and labels the caulk tubes accordingly.