This sealant is a solvent-free and one-component at room temperature curing product. It is paste, can be squeezed or daubed. It has the characteristic of sag resistance, embedded in vertical seam and seam roof not flowing. After Curing it will be like rubber and to be elastic.

It also can show the good adhesively with metal, rubber, wood, ceramics, glass, cement components etc. Sealant is a materials used to fill the gaps, holes, connectors, joints, etc.) With the two big functions both adhesive and seal.

Applications

Polyurethane sealant is widely used in civil engineering and construction, transportation and other industries:

1.The application in the field of architecture: gap of the doors, windows, and glass to be filled.

2.Applications in the civil engineering: highways, Bridges, airport runway and other sealing caulking;

3.Applications in the automotive, seal need for windows assembly (mainly windshield).

Characteristic

1.Wide range of adjustable performance, strong adaptability;

2.good performance of Wear-resisting;

3.Mechanical strength;

4.good performance of adhesive;

5.Good elasticity, excellent resilience, and used for dynamic joint;

6.good flexility in Low temperature;
7.service lifelong to be of 15 ~ 20 years;

8.good performance of oil resistivity;

9.Biological aging good resistance of

Water-expanding waterproof sealant

Project		Indicators
		PJ-220	PJ-400
Solid content / %		≥85
Density/(g/cm³)		规定值±0.1
Drop/ mm		≤2
Drying time/h		≤24
7-day tensile bond strength / MPa		≥0.4	≥0.2
Softness and gentleness		-20°CNo cracks
Tensile properties	Tensile strength / MPa	≥0.5
	Strain at break/%	≥400
Volume expansion rate/%		≥220	≥400
Long-term immersion volume expansion rate retention rate/%		≥90
Water pressure resistance / MPa		1.5Non-permeable	2.5Non-permeable
Thickness of the actual work / mm		≥2
Volume expansion rate retention rate of the soaking medium (%)	Saturated Ca(OH)2 solution	≥90
	5% NaCl solution	≥90
Content of harmful substances	VOC/(g/L)	≤200
	Free toluene diisocyanate TDI/(g/KG)	≤5
This is carried out based on the nature of the groundwater and is agreed upon by both the supplier and the demander.

Packaging:
The product packaging should be waterproof and moisture-proof, and there should be rain and moisture prevention marks on the packaging. The packaging box should have sufficient strength to ensure that it will not be damaged during transportation, handling, and stacking under heavy loads.
Transportation:
During transportation, it should be protected from sunlight, rain, impact, and squeezing of the packaging. The product should be transported as a non-dangerous goods.
Storage
It should be stored in a dry, ventilated, and cool place. Direct sunlight should be avoided. In winter, appropriate anti-freezing measures should be taken. The product is valid for 9 months from the date of production.

Mechanical properties of polyurethane sealant

Project			Technical indicators
			20HM	25LM		20LM
Density g/cm3			Standard value±0.1
Liquidity	Drop (N-shaped)，mm		≤3
	Leveling property (L type)		Smooth and flat
Drying time/h			≤24
Extrusion rate: ① ml/min			≥80
Validity period ② /h			≥1
Elastic recovery rate /%			≥70
Tensile modulus MPa		23℃	＞0.4or ＞0.6		≤0.4and≤0.6
		-20℃
Settling adhesion property			No damage
Adhesion after water ingress			No damage
Bonding property after cold drawing and hot pressing			No damage
Quality loss rate			≤7
Note: ①: This item is applicable only to single-component products ②: This item is applicable only to multi-component products

Packaging:
The packaging can be in carton or barrel form. The packaging containers should be sealed. There should be rain and moisture-proof marks on the packaging. The packaging boxes should have sufficient strength to ensure that the product will not be damaged during transportation, handling, and stacking under heavy loads.
Transportation:
During transportation, it is necessary to prevent exposure to sunlight and rain, as well as impacts and squeezes on the packaging. The product should be transported as non-dangerous goods.
Storage:
The product should be stored in a dry, ventilated, and cool place, with a storage temperature not exceeding 27 degrees. The shelf life of the product is no less than 6 months from the date of production.

Keywords