Urochem 515

SINGLE COMPONENT LOW MODULUS HYBRID CONSTRUCTION SEALANT

DESCRIPTION

Urochem 515 is a high-performance low modulus moisture curing sealant, based on hybrid technology which is both isocyanate and VOC free. It has a good cure rate, excellent moisture, and oxidation resistance, and exhibits excellent adhesion to cementitioussubstrates, asphalt, brick, stone, steel, wood, and ceramic tiles. It has an extremely low modules and high elongation and is recommended for use in areas where extreme movement is anticipated. (50% of initial joint width)

APPLICATION

• Place sausage in the barrel gun, cut end off sausage and fit the nozzle; trim the tip to suit the joint spacing to be filled. Insert backing rod to the correct depth. Gun the product into prepared joints and smooth with a dry spatula. The joint width should be designed to accommodate the expected movement, the joint ratio for 6 – 10mm wide joints is 1:1 thereafter a ratio of 2:1 should be respected.

• Note a minimum width of 6mm and a maximum of 50mm should be adhered to. A backing cord/bond breaker should be used depending on application, to prevent three-sided adhesion.

PRODUCT APPLICATION

• Urochem 515 can be used as a joint sealer and crack filler on various surfaces and will provide excellent movement accommodation. It can be used externally in road joints if it is recessed by 5mm to avoid tyre wear. It provides medium chemical, wear and corrosion resistance, while at the same time curing to a 15 Shore A hardness (+/- 5 Shore A). A degree of colour change with time is to be expected. It is not recommended for use in water retaining structures.

• If applied to natural stone, we recommend the use of Urochem 105 Primer. Urochem 515 is overcoatable, however the coating will crack as it will not accommodate the same movement as the sealant. It is recommended that a compatibility test is done prior to application or painting.

CLEANING

Clean all tools and equipment immediately after use with Urochem 901, as the cured material is very difficult to remove.

SAFETY

• No priming required.

• Excellent flow characteristics.

• Long pot-life.

• High tensile, flexural, and compressive strength.

• Excellent adhesion to steel and concrete.

• Rapid installation and strength gain.

• High resistance to dynamic loads and chemical attack.

• Tolerant to damp surfaces.

SURFACE PREPARATION

All surfaces to be clean sound and dry, free of moisture, dust, laitance, and oil. If used in severe or damp conditions prime with Urochem 106.

APPROXIMATE COVERAGE

Joint Dimension:

LM per 600ml:

6 x 6mm

16.6

8 x 8mm

9.38

10 x 10mm

6

12 x 6mm

13.9

15 x 8mm

8.3

TYPICAL PROPERTIES
Mixing Ratio
Single component
Skin over time
1-2 Hrs dependant on RH, temp & thickness
Practical Cure
+ 2mm per day dependant on RH & temp
Hardness
+ 15 Shore A
Tensile strength
0.8 – 1.5 Mpa
Colour
Grey, colours available on order
Density
1.4 Cured
Movement accommodation
50 % of initial joint width
Application Temp.
5 – 35°C
Shelf Life
12 Months
Pack Size
600 ml sausages
Application Temp.
5 – 35°C
Cleaning
Urochem 901
Storage
Store in a cool dry place