ASTM C834 PDF
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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Sealant types Generally, caulks and sealants are members of one of the following types of chemical families. The following tests shall be done: Once cured, polyurethanes have limited paintability and may react with alkyd- or oil-based paints. This standard does not purport to address all of the safety concerns, if any, associated with its use. Once cured, they are very flexible, extremely durable and resist ultraviolet light degradation.
Test methods relate to special standard substrates of glass, wood and aluminum. Choices must be made after considering the amount of expansion and contraction the joint will experience at the extreme temperature ranges of the area. Typically, the higher the cost, the greater the performance you can expect. The sealant shall be composed of latex formulated with appropriate fillers, pigments, and chemical additives. How much joint movement is required? Silicones are also reactive-curing compounds, but they offer easy gunning ability.
They tend to be more expensive than other types of sealants. Answering these questions before you begin will help you select the best sealant for the job: 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.
The inch-pound in parenthesis are provided for information purposes only. This specification covers latex sealants used for sealing joints in building construction.
Some must be applied to a primed surface, but in general they adhere well to a variety of surfaces. Is it an inside or outside application? Every manufacturer of quality products tests their products and asstm the caulk tubes accordingly. They are low in cost and come in a wide range of performance grades. Many are available in colors to match substrate, eliminating the need for painting.
Answering these questions before astj begin will help you select the best sealant for the job:. They shrink little while curing and can withstand traffic once cured. 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.
New silicone may not stick to old silicone, cc834 proper surface preparation is the key to successful sealant repairs where silicones have been used. Applying sealants to gaps and joints in construction projects takes more than a strong wrist and a steady hand. Is this an above — or below-ground application? The physical properties of the sealant shall conform to the specified requirements according to type and grade. It should be c384 by the user that not all sealants meeting this specification are suitable for all applications and all substrates.
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: Currently, there is no ISO standard similar to this specification. What is the asfm and surface temperature at the time of application?
Sealants, Caulks, Caulking Guns – PaintPRO
Unauthorized reproduction of any information on this site is a violation of existing copyright laws. It is informational only and not an official part of the standard; the full text of the standard itself aatm be referred to for its use and application. Link to Active This link will always route to the current Active version of the standard. Historical Version s – view previous versions of c8834.
All acrylics are paintable, and no primer is needed before application. Their jelly-like consistency makes them hard to tool for a nice finish, but they cure quickly and will cure at below-freezing temperatures.
Does the sealant need to be paintable or must it match the substrate? These are the most common in the paint industry and come in a variety of formulations that affect cost, durability and adhesion. Like any family, each has strong points, f834 points and idiosyncrasies that can make it a very good — or very poor — match for the job at hand.
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. Because they are hard to remove completely, especially on porous surfaces, repairs and future painting can be difficult. They maintain their properties over a wide temperature range.
It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability qstm regulatory limitations prior to use. 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. PaintPRO Archives pg 1 of 2. Selecting a sealant requires cc834 understanding of the joint: It is essential, therefore, that the type and grade be specified for proper description of a sealant.
Successful gap-filling starts with selecting the right sealant for the job and continues with proper surface preparation and application.