One component polyurethane sealant for construction

• Description:

Surtek 3511 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.

2. Uses:

Surtek 3511 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.

3.		Characteristics:
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
4.		Technical Data:
			Items	Unit	Data
1			Color		Black, White, Grey
2			Non-sag properties		Good
4			Appearance		Uniform paste
5			Density	g/ cm3	1.35±0.05
6			Tack-free time	min	~50
7			Curing rate	mm/24hr	＞3
8			Movement capability	%	25
9			Shore A hardness		30±5
10			Tensile strength	Mpa	＞2
11			Elongation at Break	%	≥700
12			Tear strength	MPa	＞6
13			Application temperature	°C	＞-5
14			Service temperature	°C	-40<90
Typical properties after seven days cure at 25°C and 50% RH.
5.		Application:

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 s est 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.

6. Packaging:

310ml cartridge, 20 pcs/carton 600ml sausage, 20 pcs/carton

7. 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 9 months.

Note:

The information and recommendations relating to the application and end-use of COMENS’ products are given in good faith based on COMENS’ current knowledge and experience of the products when properly stored, handled and applied under normal conditions. This information must on no account be used as a substitute for necessary prior tests which alone can ensure that a product is suitable for a given use, due to the practical differences in materials, substrates and actual site conditions. Users are requested to check that they are in possession of the latest version of this document and COMENS’ is at their disposal to supply any additional information.