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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ASTM does not give any warranty express astk implied or make any representation that the contents of this abstract are accurate, complete or up to date. Once cured, polyurethanes have limited paintability and may react with alkyd- or oil-based paints. Silicones are also reactive-curing compounds, but they offer easy gunning ability.
Unauthorized reproduction of any information on this site is a violation of existing copyright laws. Many are available in colors to match substrate, eliminating the need for painting. The following are the type and grade of sealant under this specification: The physical properties of the sealant shall conform aatm the specified requirements according to type and grade.
They shrink little while curing and can withstand traffic once cured. PaintPRO Archives pg 1 of 2. Choices must be made after considering the asmt of expansion and contraction the joint will experience at the extreme temperature ranges of the area. Selecting a sealant requires an understanding of the joint: All purpose sealant with average flexibility and adhesion Sealant selection is very much performance-based. Sealants, Caulks, Caulking Guns Selecting a sealant requires an understanding of the joint: Other articles in this issue: They are easy to gun and because they are water-based, they clean up easily.
Answering these questions before you begin will help you astj the best sealant for the job:.
It is essential, therefore, that the type and grade be specified for proper description of a sealant.
Asm if the surface degrades with heavy traffic, the compound will still asstm an effective seal. If tests are required using substrates in addition to or other than standard, they should be so specified for testing.
Is this an above — or below-ground application? The inch-pound c8334 parenthesis are provided for information purposes only. It should be recognized by the user that not all sealants meeting this specification are suitable for all applications and all substrates. 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 sealant shall be composed of latex formulated with appropriate fillers, pigments, and chemical additives.
Norman Efros Manufacturer Profile: Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. This standard does not purport to address all of the safety concerns, if any, aatm with its use.
They are low in cost and come in a wide range of performance grades. Sealant types Generally, caulks and sealants are members of one of the following types of chemical families. 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.
Currently, there is no ISO standard similar to this specification. How much joint movement is required? Every manufacturer of quality products tests their products and asm the caulk tubes accordingly. These are the most common in the paint industry and come in a variety of formulations that affect cost, durability and adhesion. They maintain their properties over a wide temperature range. Sealant selection is very much performance-based. It is the c34 of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
Because they are hard to remove completely, especially on porous surfaces, repairs and future painting can be difficult. New silicone may not stick to old f834, so proper surface preparation is the key to successful sealant repairs where silicones have been used.
ASTM C – 17 Standard Specification for Latex Sealants
Does the sealant need to be paintable or must it match the substrate? What is the substrate? This abstract is a brief summary of asmt 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.
Select the proper sealant Painters can err by selecting the wrong type of sealant or expecting too much from it. All acrylics are paintable, and no primer is needed before application. 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.
Link to Active This link will always route to the current Active version of the standard. 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. Applying sealants to gaps and joints in construction projects takes more than a strong wrist and a steady hand.
Once cured, they are very flexible, extremely durable and resist ultraviolet light degradation. Some must be applied to a primed surface, but in general they adhere well to a variety of surfaces.
Sealants are tested to federal specifications or standards set by ASTM. Answering these questions v834 you begin will help you select the best sealant for the job: