Multi-Purpose PU (polyurethane) Adhesive Joint Sealant -Surtek 3621

• Customization: Available
• Bonding Function: Adhesive Joint Sealing
• Morphology: Uniform Paste
• Model NO.: Surtek 3621
• Material: Polyurethane
• Classification: Room Curing
• Main Agent Composition: Polyurethane Prepolymer
• Characteristic: Waterproofing
• Promoter Composition: Complexing Agent
• Composition: Organic Material
• Color: Black White Grey
• Density: 1.35±0.05 Kg/L
• Cure Mechanism: Moisture-Curing
• Tack-Free Time (23 ºC, 50% Rh): 40~60 Min
• Rate of Cure (23 ºC, 50% Rh): ≥ 3.5 mm/24hrs
• Non-Sag Properties: Good
• Shore a Hardness: ~40
• Shear Strength: ≥ 1 N/mm^2
• Tensile Strength: ≥ 2 N/mm^2
• Elongation at Break: ~ 500%
• Tear Strength: 6 N/mm
• Transport Package: 310ml Cartridge 600ml Sausage 200L Drum
• Specification: ISO9001/TS16949
• Trademark: Surtek
• Origin: China
• HS Code: 3506100090
• Production Capacity: 72000000PCS/Year

Product Description

DESCRIPTION
Surtek 3621 is a one-component, moisture-curable, polyurethane-based, elastic adhesive joint sealant. After curing, it provides a permanently elastic bond to fasten materials with different coefficients of expansion. 

ADVANTAGES
1, Good Adhesion to a wide range of substrates. 
2, Cures rapidly to a permanently elastic consistency with excellent cut and tear resistance. 
3, Low odor, non-staining. 
4, Surface paintable with water, oil, and rubber based coatings. 
5, Non-corrosive. 
6, Provides shock resistance and vibration damping. 
7, Exhibits high recovery (> 90%), making it ideal for sealing dynamically moving joints. 
8, Weather resistant. 

APPLICATIONS
1, Vehicle bodies and cab construction including panels, underbody components, and roofing. 
2, Front and rear spoilers, auto trim, moldings, body seams, and welded joints. 
3, Waterproofing exterior lap seams in many applications, including truck trailers, RV's, metal roofs, window perimeters, grain bins and HVAC units. 
4, Waterproofing rivet seams. 
5, Sealing of exposed and concealed joints of aluminum, steel, coated metals, wood, roof rails, and door hinges in transport equipment. 
6, Sealing and caulking expansion joints, pre-cast concrete panel joints and joints between logs on log homes. 

DETAILED IMAGE
























TECHNICAL DATA SHEET OF SURTEK 3621 

Appearance	Uniform Paste
Color	Black/White Grey
Density	1.35 ± 0.05 kg/L
Tack-free time*	40~60 min
Rate of cure*	~3.5 mm per 24 hrs
Shore A hardness	40±5
Tensile strength	≥2 N/mm^2
Elongation at break	≥500%
Shear strength	≥1 N/ mm^2
Glass transition temperature	-45°C, approx.
Service temperature (continuous) Short - term (up to 48 hrs)	-40°C to +90°C 120°C

PROCESS
Cleaning: 
Clean surface with a strong jet of compressed air, sandblast, or solvent to ensure the surface being clean, dry, free of oil, grease and of sound quality. 
Activating/Priming: 
Activators and/or primers may be required to achieve optimal adhesion depending on the nature of substrates. 
Application of sealant: 
Cut tip to desired shape and size. Puncture airtight seal. Intsall with hand or power operated gun and extrude the sealant into the joint. Clean excess sealant using hard rubber plate or finger wet with soap solution. 

PACKAGING
1.310ml cartridge
2. Flexible Package: 400ml, 600ml sausage
3. Drum: 200L

STORAGE AND SHELF LIFE
When stored at the recommended conditions in original, unopened containers, this product has a shelf life of 9 months. 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. And high-temperature container transportation is prohibited as well. In the long-time high temperature and high humidity storage environment, the product is easy to get viscous, extrusion will be deteriorated and shelf life will be shortened.