Acrylic sealant: characteristics, types and applications, differences from silicone
During construction and repair work, it is often necessary to seal cracks or seams formed at the junction points of individual elements to the main structure. For these purposes, there are special compositions made on a polymer base. One of them is an acrylic sealant with excellent adhesion to most types of building materials.
Characteristics and composition of acrylic sealant
The components that make up the sealant make it resilient for a long period of use, resistant to vibrations. After drying, the surface treated with a sealant can be painted or plastered. Acrylic is well suited for sealing small holes, joints between logs and cracks of different building materials. Some types are used as glue for ceiling plinth.It is enough to fill in means in deepening and to wait for its drying.
The structure includes the following components:
- calcium carbonate;
- titanium dioxide;
- plasticizers and other additives.
All substances in the composition have excellent adhesion to porous surfaces and are resistant to UV rays. It is very important safe use of acrylic. The composition of the components does not have toxic additives that are harmful to human health, which allows you to work without protective equipment.
Despite the positive characteristics of the components, after three years, the sealant loses its properties. Its structure acquires brittleness, decreases adhesion, which is expressed by the peeling of acrylic from the surface of the material. The use of acrylic is best suited for interior work, as the open air and negative temperatures make it hard.
Components added to sealants give it plastic properties that can be called memory. After stretching or any other deformation, the frozen layer acquires the original shape. There is such a concept that determines the positive properties of a material, as a limiting indicator of stretching at the maximum effect of stress.That is, after exceeding this value, the frozen composition does not restore its original shape. Then the conclusion suggests itself, the larger the value index, the better the material properties.
The maximum value of the displacement amplitude should not exceed 10% of the stretching index. With these data acrylic tool can be used for outdoor work in the open air.
Better to know the acrylic sealant will help its characteristics:
- when drawing seams their width can make from 6 to 50 mm. The optimum layer thickness is ½ of the seam width. If the composition is applied wider than 6 mm, use a sealing cord. It is produced in different diameters from 6 to 50 mm;
- sealant is sold in different packages. Its consumption is calculated for seams 10 mm wide and 6 mm thick. For example, 22 kg of capacity is enough to handle 300 ppm, and from a 325 ml tube you can pour 5 p.m of seams;
- during work, the temperature of the treated surface should be in the range from +4 to +32aboutFROM;
- maintains ambient temperature from-40 to +120aboutFROM;
- 24-30 hours after the seams dry out, they can be painted with latex paints;
- in order to determine how much time is needed for the complete hardening of the seams, they start from 10 mm thickness. At a temperature of 25aboutWith a humidity of 50–60%, such a layer dries for 24 hours;
- setting to any surface takes less than 1 hour;
- the composition retains its properties after five cycles of freezing and thawing at a temperature of -15aboutFROM;
- the standard for a gap is 550%;
- in a humid environment, the composition dries poorly and adheres to the surface. When working in wet weather, the seams are covered with foil. It is not recommended to apply acrylic to wet surfaces;
- packaging sealant occurs in tubes, buckets, cartridges or small tubes;
- storage occurs only in packed form at a temperature of +20aboutWith no more than 1 year.
When working with foam, it is possible to stain hands, clothing or surrounding objects. Read: what can clean the foam using popular methods and special tools.
The composition can be sold single component, two - or multi-component. Ready-to-use acrylic is single component. If it is necessary to mix the compositions before starting work, then these are multi-component sealants.
There are 3 types of acrylic, which determine their scope.
Sealants of this class are used for interior work in rooms with a minimum level of humidity. This includes glue for ceiling plinth, as well as compositions for application to wood, gypsum plasterboard, concrete, brick. It is impossible to increase the humidity inside the room until the composition is completely dry.
Use a water-resistant composition is better in the kitchen or bathroom, where the humidity level is elevated. Substances containing glue are more resistant to temperature changes and moisture, which ensures good adhesion to the surface. Waterproof acrylic has excellent adhesion with wood, ceramics, foam concrete, and the surface can be smooth or porous. Despite the fact that the sealant is water resistant, it should be applied only on a dry surface and better indoors.
The structure for external works is steady against hostile environment and low temperatures. Frost-resistant sealant is more elastic than analogs for internal work. The optimum operating temperature range is from -20 ° C to + 70 ° C.Under such conditions, the composition for external works will preserve the integrity of the seams after numerous cycles of freezing and thawing. The cold-resistant sealant is well suited for sealing joints between logs of wooden buildings. The glue which is a part well seizes with wood, forming a hermetic joint.
Difference by color
Appearance means may be transparent, white or color. White color is considered traditional for plumbing, as it is suitable for most products, such as sinks, bathtubs, toilet bowls, etc. The transparent version is considered to be a classic because of its extensive use. A colorless seam is not visible on any colored surface, which allows for the incorporation of cracks of any kind without the restriction of materials. If you want to highlight the joint or choose a shade for a certain color of the object using a color composition. The most popular sealants, imitating the color of the tree. For example, a shade of cherry or oak is popular for sealing seams between logs.