Dolphin WS-520 Silicone Sealant

Dolphin WS-520 Silicone Sealant is a specified, premium performance weather sealant specially designed for general glazing and weather sealing in curtain wall and building facades. Excellent weatherability, virtually unaffected by sunlight, rain, snow, ozone. Excellent unprimed adhesion to a wide variety of construction materials and building components.Ease of application and ready to use as supplied.


Ideal for expansion, connection, perimeter and other movement joints, Neutral cure - suitable for use on coated glass, galvanized steel, masonry and other porous and non- porous substrate, Extension compression movement capability of up to + / - 50 % of original joint width.

Application instruction

Application surfaces should be clean, dry, sound and free from all contaminants ie, dust, greese and rust etc.The specified sealant bead size should be calculated to comply with the compression and extension capabilities of the sealant in relation to the anticipated joint width due to expansion and contraction. Generally calculation of the width ofDolphin WS-520 Silicone Sealant (Neutral Oxime Weather Sealant) bead should be computed on the basis of a maximum +50% compression and extension capability; minimum bead size should not be less than 3mm to accommodate movement. Design joint depth of which ratio width becomes 0.5 to 1. Suitable joint (Depth vs. Width) 6mm x 6mm 8mm x 8mm 10mm x 20mm Joint size minimum 6mmx6mm Joint size maximum 30mm.

Storage and Shelf life

When stored in original unopened container at or below 25°C, Dolphin WS-520 Silicone Sealant (Neutral Oxime Weather Sealant) has a shelf life of 12 months from the date of Manufacturing. Containers should always be kept sealed when not in use. After a container has been opened and the entire contents have not been used, extrude 3/8’’ of material pass nozzle opening. When ready to use, pull out cured plug. Sealant is ready to use.


Application Video

Dolphin WS-520 Silicone Sealant (Neutral Oxime Weather Sealant) is available in HDPE cartridge, 200 Liter drum, 550 ml and 600 ml sausages.


Typical Properties
Black, Grey and White. RAL colors are available upon request.
Skin Over Time
?15 min
Tack Free Time
?25 min
Specific Gravity
1.40±0.02 g/cm3
30-35 points
Depth Cure
> 2.5/ Day
Viscosity Flow
Non sag
Tooling Time
15 min
Tensile Strength
1.10-1.30 N/mm2
Elongation Approx
Service Temp
-40 upto 200°C
Young’s Modulus
0.20-0.30 MPa


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