Stone adhesive resistant to weather
Stone Adhesive Resistant to Weather: Characteristics, Types, Uses and How to Choose
Weather-resistant stone adhesive is a special type of adhesive that is used for the adhesion of natural stone, artificial stone, granite, marble, slate etc. outdoors permanently. Weather-resistant stone adhesive is totally different from indoor adhesives as it is based on a modified polymer that can resist all the potential weather-caused destructive impacts on the adhesive and to provide long-time adhesion. Nowadays, with the development of the outdoor architectural decoration and landscape design technologies, weather-resistant stone adhesive is widely used in stone works and will solve the problems related to falling off the stone and its cracking, changing color and delaminating due to climate change factors.
Main Features of Weather-Resistant Stone Adhesive
Weather-resistant properties of stone adhesives can be explained by their multilevel weather-resistant system which can function even in the most complicated and dynamic weather conditions and organize adhesive due to environmental impact. The main indicator of weather-resistant stone adhesive shows specific key points.
1. Resistance to ultraviolet radiation that deactivates the chain of polymer molecules in ordinary adhesives leading to yellowing, powdering, fragility and loss of bonding durability.Outstanding outdoor stone adhesive is made using the formulation that consists of anti-UV stabilizers and light-shielding agents to restrain ultraviolet radiation efficiently. As a result, the adhesive is stable color-wise and mechanically despite the extended exposure to sunlight, making it ideal for surfaces fully exposed to sun rays, outdoor stone pavements, and landscape stone constructions.
2. Water and Moisture Resistance
Outdoor stone overlays are subject to rain, dew, and damp air all year round. Conventional adhesives are prone to getting moisture inside and swelling, which leads to interface debonding. Weather-resistant stone adhesive has a tight cured structure with low water absorption and top-notch waterproofness and moisture resistance properties. The adhesive offers continuous rain resistance and resistance to high humidity penetration, thus helping avoid the peeling of the adhesive joint and making it suitable for humid outdoor working conditions and humid regions.
3. Resistance to Freeze-Thaw Cycles
In regions with moderate and cold climate, freeze-thaw cycles of water in stone openings is one of the main factors that contribute to adhesive failure. When water in the tiny cracks of the adhesive layer freezes and expands, it exerts considerable pressure to disrupt the adhesive joint.When it comes to qualified adhesives for weather-resistant stone, one of their best features is their exceptional resistance to freezing-thawing processes. Freeze-thaw resistant adhesives are tough enough to withstand multiple cycles of cold freezing and hot thawing without losing the elasticity and adhesion toughness of the glue. As such, its freezing and thawing cycles can help avoid cracking and debonding of the adhesive layer due to alternating temperature stresses. The majority of elite products on the market are able to endure temperature fluctuations within the range of -40°F to +194°F, which covers almost all climatic areas in the world.
4. Resistance to High/Low Temperatures
The environment outdoors experiences significant temperature fluctuations during different seasonal periods. The summer heat will eventually melt regular adhesives, thus significantly decreasing their shear strength while the cold of the winter will make the adhesives too brittle to perform their bonding function. Weather-resistant stone adhesives can adapt to any temperatures, avoiding softening at high temperatures and breaking at low temperatures, thus being able to present stable tensile and shear adhesion strength throughout its entire thermal spectrum.
5. Resistance to Aging due to Ozone and Atmosphere
Long exposure of adhesives to ozone, carbon dioxide, and atmosphere pollutants will speed up the processes of aging and spoilage of glue materials. Good weather-resistant stone adhesives should have a high degree of atmospheric corrosion resistance able to combat ozone oxidation with acid-base erosion in the environment prolonging the aging of materials and prolonging the period of use of stone bonding projects.
Different Types of Weather-resistant Stone Adhesives
There are three main types of weather-resistant stone adhesives depending on their formula ingredients, curing technique, and performance characteristics solving various problems with different stone types or technical solutions.
1. Modified Silicone Stone Adhesive
This is the most widely used product in the family of universal adhesive products. It has strong resistance to ultraviolet and ozone effect and to high and low temperatures along with exceptional elasticity for the displacement of ±20% and compatibility with granite, marble, sandstone, and some other natural minerals. It has no corrosive effect on these materials and will therefore not leave any stains on porous surfaces. It can be applied for bonding, sealing, and filling gaps in outdoor stone construction operations.
