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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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. They tend to be more expensive than other types of sealants.

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 shrink little while curing and can withstand traffic once cured. They maintain their properties over a wide temperature range. Successful gap-filling starts with selecting the right sealant for the job and continues with proper surface preparation and application.

Many are available in colors to match substrate, eliminating the need for painting. 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.

Their jelly-like consistency makes them hard to tool for a nice finish, but they cure quickly and will cure at below-freezing temperatures.

It is essential, therefore, that the type and grade be specified for proper description of a sealant.

Product Specifications

Applying sealants to gaps and joints in construction projects takes more than a strong wrist and a steady hand. They are low in cost and come in a wide range of performance grades. It should be recognized by the user that not all sealants meeting this specification are suitable for all applications and all substrates.

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Test methods relate to special standard substrates of glass, wood and aluminum.

This abstract is a brief summary of the referenced standard. Norman Efros Manufacturer Profile: Unauthorized reproduction of any information on this site is a violation of existing copyright laws.

Historical Version s – view previous versions of standard. This standard does not purport to address all of the safety concerns, if any, associated with its use. PaintPRO Archives pg 1 of 2. Every manufacturer of quality products tests their products and labels the caulk tubes accordingly.

Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Other articles in this issue: 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 asm can be difficult. Answering these questions before you begin will help you select the best sealant for the job:. How much joint movement is required?

ASTM C – 17 Standard Specification for Latex Sealants

What is the ambient and surface temperature ast the time of application? New silicone may not stick to old silicone, so proper surface preparation is the key to successful sealant repairs where silicones have been used. Selecting a sealant requires an understanding of the joint: Typically, the higher the cost, the greater the performance you can expect.

asrm Is this an above — or below-ground application? 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 receive different atsm based on their ability to move, flex and return to their original configuration.

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Silicones are also reactive-curing compounds, but they offer easy gunning ability. 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 following are the type and grade of sealant under this specification: Does the sealant need to be paintable or must it match the substrate? If tests are required using substrates in addition to or other than x834, they should be so specified for testing. All purpose sealant with average flexibility and adhesion Sealant selection is very much performance-based.

What is the substrate? 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 Selecting a sealant requires an understanding of the joint: Select the proper sealant Painters can err by selecting the wrong type of sealant c83 expecting too much from it.

Sealant selection is very much performance-based. 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.

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. They are easy to gun and because they are water-based, they clean up easily. Is it an inside or outside application?

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