CERA SEAL Expansion Joint Sealant is two-part polysulphide high performance synthetic rubber sealant based on thiokol polysulphide polymer. On curing it forms a durable rubber seal with excellent adhesion to most building material surfaces and remarkable resistance to deterioration.
High performance synthetic rubber sealant
Excellent adhesion to concrete surfaces as well as brick, steel, glass, aluminium and wood
High chemical resistance
Accommodates the movements of joints
Resistant to ozone and ultra violet radiations
Easy to use Easy to use
Ceraseal is a gun grade polysulphide sealant, which because of its very low coefficient of thermal expansion allows movement of structural members without causing disintegrity, at the same time effectively filling the joints against seepage of water as well as ingress of corroding agents into the structure.
Ceraseal two-part polysulphide provides a lasting seal in most building and civil engineering applications where above average movement is expected.
Ceraseal is effective in expansion joints in mass concrete and similar construction work such as subways, basements, retaining walls, bridges, sea walls, reservoirs, and water retaining structures.
Ceraseal can be used for applications including sealing of curtain walls, expansion joints, infill panels and many specialized glazing situations.
Ceraseal may also be used to seal joints in floors or other areas where resistance to wear and tear is required
Ceraseal two-part polysulphide complies with the following specifications; BS 4254 for two-part polysulphide based sealant compounds, U.S. Federal Specification TT/S/227B and ASA specification A116.1.
Method Of Application:
Surface Preparation: All surfaces must be clean, dry, sound and free from laitance, dust oil and any other contamination. Mould release agents, water repellents and any other surface treatment or protective coatings must be removed from the joint surface to obtain proper adhesion. Porous surfaces, metal scale and corrosion should be cleaned where necessary by grinding, saw cutting, grit blasting or a combination of these to obtain a clean sound surface. Dust and loose particles must be either brushed or blown out of the joint with oil free compressed air.
Any expansion joint filler must be checked to ensure it is tightly packed and are devoid of voids at the base of sealing slots before the positioning of bond breaker.
Ceraseal two-part polysulphide gun grade sealant is supplied as a single pack. The base and catalyst are together in the same tin and only require mixing before use. This is best achieved by using a slow speed electric drill fitted with a suitable paddle.
Avoid mixing speed greater than 250 rpm as this will generate excessive heat and shorten the application life. During mixing, scrap the sides of the tin with a spatula to avoid pockets of unmixed sealant. Continue to mix until parts are mixed completely. Hand mixing can be adopted for smaller quantities.