Application of Polyurea Waterproof and Anti-Corrosion Materials in Sewage Tanks

• Customization: Available
• CAS No.: 951
• Color: All Color Can Offer
• Model NO.: STWD951
• Main Raw Material: Polyurethane
• Method: Spray
• Level: Intermediate Coating or Top Coating
• Drying Method: Air Drying
• Certification: ISO14001, ISO9001
• Substrate: Steel , Concrete
• Components: Mdi
• Formation Mechanism: Conversion Type
• Transport Package: Iron Bucket Packaging
• Specification: 410kg/group
• Trademark: STWD
• Origin: Shanghai, China
• Production Capacity: 80000kg/Day

Product Description

STWD951 spray polyurea elastomer waterproof
anticorrosion protective coating

Product descriptions     STWD951 is a 100% solid content aromatic spray polyurea elastomer. It is not sensitive to environment humidity and temperature during application, can fully meet the requirements of anticorrosion waterproof projects which has been widely used in the industrial and commercial field for anticorrosion waterproof protection.
                     
Product features and advantages.
*Solvent free, 100% solids, safe, environmentally friendly and odor free.
*Rapid cure, can be sprayed forming on any bent, slope and vertical surfaces, no sagging.
*Dense coating, seamless, with good flexibility.
*High adhesive strength, fast bonding well on steel, concrete, wood, glass fibers and other substrates.
*Excellent impact resistance, abrasion resistance
*Excellent corrosion resistance and chemical resistance to acids, alkali, salts etc.
*Excellent waterproof performance
*Good shock absorbing performance
*Excellent resistance to temperature variation
*Fast cure, application site back to service quickly
*Excellent durability to reduce the maintenance cost of lifelong 
*Extend the service life of sprayed structure

Application scopes       Construction, chemical, automobile manufacturing, metallurgy, electric power, marine, ship, film props, speakers and other fields of anticorrosion and waterproof protection.
             
Products information

Item	A	B
Appearance	Pale yellow liquid	Adjustable color
Specific gravity (g/m³)	1.13	1.04
Viscosity(cps)@25ºC	720	570
Solid content (%)	100	100
Mixing ratio(volume ratio)	1	1
Gel time(second)@25ºC	3-5
Dry time(second)	10-20
Theoretical Coverage (dft)	1.08kg/m3, film thickness:1mm

Physical properties of products

Items	Test standard	Result
Hardness (Shore A)	ASTM D-2240	88
Elongation rate(%)	ASTM D-412	400
Tensile strength(Mpa)	ASTM D-412	18
Tear strength (kN/m)	ASTM D-624	52
Impermeability(0.3Mpa/30min)	HG/T 3831-2006	Impermeable
Wear resistance (750g/500r)/mg	HG/T 3831-2006	4.8
Adhesive strength(Mpa)concrete base	HG/T 3831-2006	3.1
Adhesive strength(Mpa) steel base	HG/T 3831-2006	11
Density(g/cm³)	GB/T 6750-2007	1.02
Cathodic disbondment [1.5v,(65±5)ºC,48h]	HG/T 3831-2006	≤15mm

Chemical resistance

Acid resistance 10%H2SO4 or 10%HCI,30d	No rust, no bubbles, no peel off
Alkali resistance 10% NaOH, 30d	No rust, no bubbles, no peel off
Salt resistance 30g/L,30d	No rust, no bubbles, no peel off
Salt spray resistance, 2000h	No rust, no bubbles, no peel off
Oil resistance 0# diesel, crude,30d	No rust, no bubbles, no peel off
(For reference: the above data is acquired based on GB / T9274-1988 test standard. Pay attention to the influence of ventilation, splash and spillage. Independent immersion testing is recommended if requires other specific data)

Application environment

Environment temperature	0ºC-45ºC
Product spray heating temperature	65ºC-70°C
Pipe heating temperature	55ºC-65ºC
Relative humidity	≤80%
Dew point	≥3ºC

Application guide

Recommend spray machine	H-XP3 Polyurea spray equipment
Spray gun	Fusion-air purge or mechanical purge
Static pressure	2300-2500psi
Dynamic pressure	2000-2200psi
Recommend film thickness	1000-3000μm
Recoating interval	≤6h

Application note

1. Agitate part B uniform prior to application, thoroughly mix the deposited pigments, or the product quality will be affected.

1. spray polyurea within the proper time if the substrate surface is primed. For the application method and interval time of STWD polyurea speical primer please refer to STWD company's other brochure.
2. Always apply STWD951 on a small area before large application to check the mix ratio, color and spray effect are correct. For detailed information of application please refer to the latest instruction sheet of the application instructions of STWD spray polyurea series.

Product curing time

Substrate temperature	Dry	Foot traffic	Solid dry
+10ºC	20s	45min	7d
+20ºC	15s	15min	6d
+30ºC	12s	5min	5d

Note: the curing time varies with the environment condition especially the temperature and relative humidity.

Shelf Life
*From the manufacturer date and on the original package sealed condition:
A:10 months
B:10 months
*storage temperature:+5-35°C
Packing: Part A 210kg/drum, part B 200kg/drum
Make sure the product package sealed well
* store in cool and ventilated place, avoid direct sunshine exposure.

Product health and safety information  
For information and advice on the safe handling, storage and disposal of chemical products, users shall refer to the most recent Material Safety Data Sheet containing physical, ecological, toxicological and other safety related data.