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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Other articles in this issue: Some must be applied to a primed surface, but in general they adhere well to a variety of surfaces.
The physical properties of the sealant shall conform to the specified requirements according to type and grade. 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.
Sealants, Caulks, Caulking Guns – PaintPRO
The following tests shall be done: Sealant types Generally, caulks and sealants are members of one of the following types of chemical asm. Sealants, Caulks, Caulking Guns Selecting a sealant requires an understanding of the joint: 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.
Answering these questions before you begin will help you select the best sealant for the job: 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 asttm hand.
This standard does not purport to address all of the safety concerns, if any, associated with its use. Select the proper sealant Painters can err by selecting the wrong type of sealant or expecting too much from it. 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.
Many are available in colors to match substrate, eliminating the need for painting. Sealant selection is very much performance-based. Once cured, polyurethanes have limited paintability and may react with alkyd- or oil-based paints. Their jelly-like consistency makes them hard to tool for a nice finish, but they cure quickly and will cure at below-freezing d834.
Sealants used in commercial construction may be specified by awtm owner, architect or engineer; however, the contractor often has final say on brand and type.
How much joint movement is required? They are easy to gun and because they are water-based, they clean up easily. It should be recognized by the user that not all sealants meeting this specification are suitable for all applications and all substrates.
Silicones are also reactive-curing compounds, but they offer easy gunning ability. They shrink little while curing and can withstand traffic once cured. These are the most common in the paint industry and come in a variety of formulations that affect cost, durability and adhesion.
Applying sealants to gaps and joints in construction projects takes more than a strong wrist and a steady hand. Currently, there is no ISO standard similar to this specification. 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.
Selecting a sealant requires an understanding of the joint: Even if the surface degrades with heavy traffic, the compound will still maintain an effective seal. Successful gap-filling starts with selecting the right sealant for the job and continues with proper surface preparation and application.
They are low in cost and come in a wide range of performance grades. All acrylics are paintable, and no primer is needed before application. They receive different ratings based on their ability to move, flex and return to their original configuration.
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- 8c34 chemical-curing compounds are difficult to gun and tool and require solvent cleanup, they have excellent flexibility and have good to excellent durability. Norman Efros Manufacturer Profile: Link to Active This link will always route to the current Active version of the standard. All purpose sealant with average flexibility and adhesion Sealant selection is very much performance-based.
Because they are hard to remove completely, especially on porous surfaces, repairs and future painting can be difficult. This specification c8834 latex sealants used for sealing joints in building construction. What is the substrate?
ASTM C – 17 Standard Specification for Latex Sealants
It is essential, therefore, that the type and grade be specified for proper description of a sealant. The inch-pound in parenthesis are provided for information purposes only. The sealant shall be composed of latex formulated with appropriate fillers, pigments, and chemical additives. Is this an above — or below-ground application? They maintain their properties over a wide temperature range. Unauthorized reproduction of any information on this site is a violation of existing copyright laws.
PaintPRO Archives pg 1 of 2. Choices must be made after considering the amount of expansion and contraction the joint will experience at the extreme temperature ranges of the area. Every manufacturer of quality products tests their products and labels the caulk tubes accordingly. What is the ambient and surface temperature at the time of application?
Historical Version s – view previous versions of standard. If tests are required using substrates in addition to or other than standard, they should be so specified for testing.
They tend to be more expensive than other types of sealants.
Is it an inside or outside application?