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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Typically, the higher the cost, the greater the performance you can expect. Their jelly-like consistency makes them hard to tool for a nice finish, but aastm cure quickly and will cure at below-freezing temperatures.
They receive different ratings based on aetm ability to move, flex and return to their original configuration. Applying sealants to gaps and joints in construction projects takes more than a strong wrist and a steady hand. 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. Other articles in this issue: This standard does not purport to address all of the safety concerns, if any, associated with its use.
Silicones are also reactive-curing compounds, but they offer easy aatm ability. PaintPRO Archives pg 1 of 2. Sealants, Caulks, Caulking Guns Selecting a sealant requires an understanding aastm the joint: The sealant shall be composed of latex formulated with appropriate fillers, pigments, and chemical additives.
It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations qstm to use.
Unauthorized reproduction of any information on this site is a violation of existing copyright laws. Some must be applied to a primed surface, but in general they adhere well to a variety of surfaces.
ASTM C – 05 Standard Specification for Latex Sealants
Is it an inside or outside application? How much joint movement is required? Sealant types Generally, caulks and sealants are members of one of the following types of chemical families. Currently, there is no ISO standard similar to this specification. 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.
All purpose sealant with average flexibility and adhesion Sealant selection is very much performance-based. 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.
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.
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 zstm to for its use and application. Select the proper sealant Painters can err by selecting the wrong type of sealant or expecting too much from it. Answering these questions before you begin will help you select the best sealant for the job:.
Does the sealant need to be paintable or must it match the substrate? The physical properties of the sealant shall conform to the specified requirements according to ast, and grade. 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.
What is the substrate? Answering these questions before you begin will help you select the best sealant for the job: It is essential, therefore, that the type and grade be specified for proper ast, of a sealant.
Many are available in colors to match substrate, eliminating the need for painting. Sealants are tested to federal specifications or standards set by ASTM. They are easy to gun and because they are water-based, they clean up easily. New silicone may not stick to old silicone, so proper surface preparation is the key to successful sealant repairs where silicones have been used.
This abstract is a brief summary of the referenced standard. Sealants used in commercial construction may be specified by the owner, architect asm engineer; however, the contractor often has final say on brand and type.
They x834 to be more expensive than other types of sealants. If tests are required using substrates in addition to or other than standard, they should be so specified for testing. It should be recognized by the user that not all sealants meeting this asrm are suitable for all applications and all substrates. Selecting a sealant requires an understanding of the joint: They maintain their properties over a wide temperature range. Because they are hard to remove completely, especially on porous surfaces, repairs and future painting can be difficult.
They shrink little while curing and can withstand traffic once cured. Link to Active This link will always route to the current Active version of the standard. These are the most common in the c8344 industry and come in a variety of formulations that affect cost, durability and adhesion.
Every manufacturer of quality products tests their products and labels the caulk tubes accordingly. Once cured, polyurethanes have limited paintability and may react with alkyd- or oil-based paints.