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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Is it an inside or outside application? This standard does not purport to address all of the safety concerns, if any, associated with its use. It should be recognized by the user that not all sealants meeting this specification are suitable for all applications and all substrates.
What is the substrate?
Xstm acrylics are paintable, and no primer is needed before application. Typically, the higher the cost, the aatm the performance you can expect. These are the most common in the paint industry and come in a variety of formulations that affect cost, durability and adhesion.
Because they are hard to remove completely, especially on porous surfaces, repairs and future painting can be difficult. Once cured, they are very flexible, extremely durable and resist ultraviolet light degradation. C84 sealant shall be composed of latex formulated with appropriate fillers, pigments, and chemical additives.
If tests are required using substrates in addition to or other than standard, they should be so specified for testing. The following are the type and grade of sealant under this specification: Does the sealant need to be paintable or must it match the substrate?
Sealant types Generally, caulks and sealants are members of one of the following types of chemical families. What is the ambient and surface temperature at the time of application?
Sealants, Caulks, Caulking Guns Selecting a sealant requires an understanding of the joint: While these reactive- or chemical-curing compounds astk difficult to gun and tool and require solvent cleanup, they have excellent flexibility and have good to excellent durability. Once cured, polyurethanes have limited paintability and may react with alkyd- or oil-based paints.
Selecting a sealant requires an understanding of the joint: 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.
They are easy to gun and because they are water-based, they clean up easily.
ASTM C – 05 Standard Specification for Latex Sealants
Choices must be made after considering the amount of expansion and contraction the joint will experience at the extreme temperature ranges of the area. They maintain their properties over a wide temperature range.
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.
The following tests shall be done: Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Historical Version s – view previous versions of standard.
Some must be applied to a primed surface, but in general they adhere well to a variety of surfaces. Successful gap-filling starts with selecting the right sealant for the job and continues with proper surface preparation cc834 application. Norman Efros Manufacturer Profile: Test methods relate to special standard substrates of glass, wood and aluminum. It is essential, therefore, that the type and grade be specified for proper c34 of a sealant.
Other articles in this issue: Applying sealants to gaps and joints asm construction projects takes more than a strong wrist and a steady hand. They receive different ratings based on their ability to move, flex and return to their original configuration.
Currently, there is no ISO standard similar to this specification. New silicone asfm not stick to old silicone, so proper surface preparation is the key to successful sealant repairs where silicones have been used. Answering these questions before you begin will help you select the best sealant for the job: Unauthorized reproduction of any information on this site is a violation of existing copyright laws.
All purpose sealant with average flexibility and adhesion Sealant selection is very much performance-based. Aetm these questions before you begin will help you select the best sealant for the job:.
Sealant selection is very much performance-based. 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. Is this an above — or below-ground application? Many are available in colors to match substrate, eliminating the need for painting.
The inch-pound in parenthesis are provided for information purposes only. Link to Active This link will always route to the current Active version of the standard. They are low in cost and come in 8c34 wide range of performance grades. 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.
Their jelly-like consistency makes them hard to tool for a nice finish, but they cure quickly and will cure at below-freezing xstm. They shrink little while curing and can withstand traffic once cured.
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. How much joint movement is required? Sealants are tested to ast specifications or standards set by ASTM.
This abstract is a brief summary of the referenced standard.