Tai'an polyurethane water-swelling water-stop glue manufacturer

Polyurethane water-swellable water-stop glue is a water-swellable, single-liquid, elastic sealant. It is based on a polyurethane precursor and contains specially grafted urethane. It has a dual sealing and water-stopping mechanism of rubber's elastic water-stopping and its own volume expansion water-stopping after contact with water. It is suitable for waterproofing concrete construction joints and preventing leakage of various types of embedded components. Water-swellable water-stop glue can cure in humid environments. Curing time depends on ambient temperature and humidity. The higher the temperature or the greater the humidity, the shorter the curing time. Once the surface has hardened (dry to the touch) it is ready for the next concrete pour. Main features:
Excellent water-stopping effect. It has a double-sealing water-stopping mechanism of rubber elastic water-stopping and its own volume expansion water-stopping when exposed to water. It can withstand maximum water pressure
Strong durability and quality. Low change rate. The structure of the water-stop glue contains urethane connecting chains, which will not cause the loss of expansion elements in the long term. At normal temperature, the service life is more than 10 years. Expansion rate (measured value can reach 3.3), very suitable for humid and watery construction environments
Convenient construction. Single component, gelatinous material, can be applied with a standard caulking glue construction gun and can be firmly adhered to the concrete. surface, regardless of whether the base is moist, smooth or rough.
Environmentally friendly, it has good chemical resistance and can withstand hydrochloric acid, salt water, sodium carbonate, potassium hydroxide and other chemicals. It can come into contact with drinking water. It is safe and non-toxic. It is an environmentally friendly product.
Construction technology and construction method of water-swellable water-stop glue
Pretreatment
Use a wire brush to remove sand and concrete residue from the construction joint surface within the laying range in advance. Then wipe it clean with water or press water. The surface area can be rough or flat, it can be dry or wet
Cut
According to the designed extrusion section, use cutting Cut off the corresponding part of the front end of the water-stop glue mouth with a knife, and use a thin wire to pierce the film inside. And shake it left and right to expand the hole. Be careful not to poke it repeatedly, otherwise the film chips will be mixed into the extruded water-stop glue, which will affect the construction quality.
Extrusion
Install the water-stop hose onto the sealing gun, and squeeze out the water-stop glue while pulling the trigger. In order for the extruded water-stop glue to adhere well to the concrete surface, the front end of the outlet should be pressed against the concrete surface. After construction, it should be confirmed that there is no gap between the concrete base surface and the water-stop glue, and the extruded water-stop glue is laid continuously and evenly on the base surface. If the extruded colloid is discontinuous or uneven, you can use a scraper to scrape or trim it appropriately.
Curing and curing
In order to ensure that the water-stop glue has good adhesion to the concrete, sufficient curing time must be ensured. It should not take more than an hour for the water-stop glue to harden on the surface after application. The surface hardening of the water-stop glue needs to be completely dry to the touch before the next concrete pouring can be carried out.
Treatment after water immersion
If it takes a long time from the construction of the water-stop glue to the next pouring of concrete, please pay attention to protect the water-stop glue from being soaked in water. If water expansion does not cause the water-stop glue to peel off due to immersion, it must be repaired before pouring concrete. The repair method is as follows: first use nails to fix the peeled water-stop glue, remove the accumulated water, then remove the peeled water-stop glue, and re-apply.
Notes
The distance between the water-stop glue and the edge of the concrete must not be smaller. If the distance is too small, the expansion stress will cause the concrete to burst. When it is necessary to extrude the water-stop glue in batches, the overlap length should not be less than 1. The next time the concrete is poured, the vibrator cannot come into direct contact with the water-stop glue.
Reference: The national standard for water-swelling waterstops is: B/3.3-, B/3.3-polymer waterproof material
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