Spu-321 Hv Polyurethane Construction Joint Sealant

• Application: Automobile, Construction
• Bonding Function: Structural Adhesive
• Color: Black
• Model NO.: SPU-321 HV
• Composition: Organic Material
• Appearance: Uniform Paste
• Transport Package: 310ml Cartridge, 600ml Sausage

Product Description

Product Description

SPU-321 HV is a low modulus one-component moisture curable polyurethane sealant. It is non sagging, of good strength and elasticity. It is weather resistant. The product is manufactured in accordance with ISO9001 and ISO14001 systems.

Uses

SPU-321 HV is used as a general-purpose sealant for sealing joints in building construction such as movement and construction joints in concrete, such as airfield pavements, brick, wood, metal and etc.

Advantages

1. One component, easy to use
2. Non sagging
3. Good adhesion to a wide range of substrates
4. Primerless for most substrates
5. Excellent elasticity
6. Good weather resistance

Product details

The product complies with the 25LM standard of JC/T482-2022 "Polyurethane Building Sealant"

Items	information
Color	black, white, grey
Appearance	Uniform paste
Packaging	310ml cartridge, 20 pcs/carton 600ml sausage, 20 pcs/carton
Non-sag properties	Good
Density	1.45± 0.05 g/cm^3
Tack-free time	~60min
Curing rate	>3mm/24hr
Movement capability	25%
Shore A hardness	30±5
Tensile strength	>2Mpa
Elongation at break	≥700%
Tear strength	>6Mpa
Application temperature	>-5°C
Service temperature (permanent)	-40°C to +90°C
Typical properties after seven days cure at 25°C and 50% RH.

Construction process

1. Joint Design

Correct joint design can assure the lifetime of buildings and sealants. To keep the flexibility of the joints, the minimum width of the joints is 5mm. The depth is 1/2 of the width. The recommended width of the joint is 80-100% of the width if the width is less than 10mm.
In order to assure the designed movement capability of the sealant, we should use back lining. Recommended depth of the joint is no less than 5mm.
2. Surface Treatment
The surface should be clean and dry. The concrete placement should be dried for 28 days.
After rainfall, it should be aired for 2-3 days. The water content of the substrates should be lower than 9%. Dryness and cleanness can assure the bonding strength to the substrates.
The surface should be clean without dust, oil or loose layers. Metal surface should be of no oil, rusty stains. If the surface is with cladding material or protective layer, we suggest test the sample.
3. Applying the sealant
Use the brush to clear the surface to make the joint achieve the above requirement.
For good appearance, adhesive tape can be used to paste on two sides of the joint. The edges of the tape should be even with the joint edges.
Pierce the nozzle with an appropriate size at 45°angle. Put the sealant into an applicator gun and squeeze the trigger uniformly into the joint. The sealant should be filled into the joint and overflow a bit in order to avoid hollow space in the sealant.
4. Appearance Treatment
Use the scraper and moisten a bit water to press and scrape flat the surface of the sealant. Take off the adhesive tape. Do not touch the surface of the sealant before within its tack-free time.

Storage and shelf life

The shelf life of polyurethane sealant is related to the temperature and humidity of the environment. The recommended storage temperature is 5-25°C , humidity is <50% RH. It is strictly prohibited that the transportation or storage temperature is over 30°C or the humidity is over 80% RH. When stored at the recommended conditions in original, unopened containers, this product has a shelf life of 9months.

Notice

The product contains isocyanates, which may cause skin and eye irritation. Avoid eye-contacting and ingestion.

Company Profile

Oriental Yuhong entered the Chinese waterproofing industry in 1995 with the goal of providing high-quality waterproofing solutions for a variety of applications, including infrastructure projects and commercial and industrial buildings.The company is now the largest waterproofing system provider in Asia. Its products and services have been exported to more than 100 countries and regions such as the United States, Germany, Brazil, Australia, Canada, Russia, Japan, Singapore, South Korea, Central Africa, and South Africa.Oriental Yuhong has more than 50 subsidiaries and 27 manufacturing, research and development and logistics facilities. Yuhong's manufacturing facilities are world class, using the finest manufacturing equipment available. This allows the company to produce a full line of top-quality products, including modified bitumen waterproofing membranes, cold-applied self-adhering asphalt waterproofing membranes and thermoplastic (TPO) waterproof membranes etc.