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"RubberNEK®" precast component sealing that will amaze you

RubberNEK®

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- extremely high water and gas impermeability
- very good adhesion strength
- quick processing, no tools needed
- pressurised-water-tight, immediately after mounting
- flexible at low tempertures, as well
- acid- and alkali-resistant
- general test certificates of construction supervisory authorities
- weather-resistant

Technical data:

RubberNEK® was tested by Material Testing Authority in Braunschweig. That is documented by General Construction Inspection Ceritficate No. P-5147/5783 MPA-BS.
RubberNEK® sealing tape serves for sealing of joints of precast concrete parts made of water-tight concrete against water under pressure and without pressure, as well as against earth humidity, as prescribed by DIN 18195 Part 4 - 6, acc. to List of Construction Rules A, Part 2, running No. 1.4.

Tightness test

Tightness of RubberNEK® was tested on a construction part at 80% compression. The results are given in the table below.

Joint	Water pressure (bar)	Action time (hours)	Test result
Expanded by 0.25 mm	0,5	24	tight
	1,0	24	tight
	1,5	240	tight
additionally displaced by 7 mm	0,5	24	tight
	1,0	24	tight
	1,5	144	tight
	2,0	24	tight
	2,5	24	tight
	3,0	24	tight

Behaviour in Ca(OH)2 and during storage at high temperature
After 28 days storage of SynkoFlex® sealig tape in saturated Ca(OH)2 solution, or in the air of 60°C temperature, no changes in mass, shape and consistency were determined.

Pressure resistance
Pressure resistance of RubberNEK® was tested at normal climate on three samples at compressions up to 80%.

Adhesion tensile strength
Adhesion tensile strength was tested on 3 samples after they had been stored in different ways. The respectively determined values are given in the table below. Thereby, loads were applied via a steel prop D = 50 mm at 2 mm / min velocity.
  

Storage period and type	Adhesion strength (kPa)	Fracture strain (%)
23°C, 50% humidity , 14 days	74	9,6
under water, 20°C , 14 days	56	13,3
8°C, 3 days	120	16,4

Miscellaneous
Furthermore, RubberNEK®  is tested by means of thermo-graviemtric analysis and infra-red spectrum.

To meet increasing requirements on efficiency and cost-saving of construction work, more and more structures are made of prefabricated concrete parts. In this respect, suppliers offer a wide range of special solutions, and individual ones, too. However, making water-tight joints between the prefabricated parts is connected with some problems. Sealing with swelling mortar, or with additional seals placed outside is both unsafe and expensive. Pre-fabricated sealing systems are only available for standard sizes, and their use in pressurised water areas is restricted.

RubberNEK®, our innovative sealing tape for joints between prefabricated concrete components offers a solution allowing for a quicker progress of construction work through the easiest handling and most flexible use.

RubberNEK® is to be mounted by simple pressing onto a joint of a concrete component. It immediately and tightly seals the joint against water, through contact pressure of the concrete component which is put on it. Thereby the sealing tape also covers imperfectly made joint surfaces or non-uniformities of the joint run. Moreover, the sealing tape features enormous water and gas impermeability, as well as excellent resistance against wear caused by weather or mechanical influence.

Due to its high elasticity, RubberNEK® even can equalise joint displacements up to 7 mm. At the same time, the material keeps its good qualities and features at low temperatures, as well. The sealing tape is also characterised by excellent adhesion properties with regard to metals, glass and other materials.

Due to these advantages, RubberNEK® has been successfully used worldwide since many years.

1) Sealing of precast concrete components joints with RubberNEK®:
- quick processing, no tools needed
- water-tightness immediately after mounting
- general test certificate issued by construction supervisory authorities
- extremely high water- and gas impermeability

2) Joint sealing with swelling mortar:
- does not compensate  movements
- danger of leakage through crazing
- problems with treatment in wet areas

3) additional seal placed outside:
- expensive sealiing
- water pressure tight only to some degree

4) prefabricated sealing profile:
- only for standardised parts
- requires very exact joints