Sikasil 728 SL is a self-leveling, one-component, ultra low modulus, elastomeric, neutral cure silicone sealant. Sikasil 728 SL does not require tooling which reduces labor, is durable and great for for cold climates. Sikasil 728 SL offers excellent flexibility for extreme high and low temperature conditions, has excellent flexibility properties for dynamic joint movement, bonds to most substrates without priming including aged asphalt and concrete and is ready to use. Sikasil 728 SL is an all-season sealant and is very easy to apply. Sikasil 728 SL has good contact/adhesion when applying to hard to reach areas and is excellent for use on runways and tarmacs. Sikasil 728 SL is jet fuel resistant and also resistant to road salts.
Saw cut joints
Do not allow sealant to come in contact with curing polyurethane sealants during cure.
Not intended for immersion.
Sealant may be applied below freezing temperatures if substrates are completely dry, frost free and clean. Contact Technical Service for more information.
Not intended for structural glazing.
Test recommended for absorptive surfaces such as granite, limestone or marble where staining may occur. ▪
Do not apply to surfaces that will be painted.
Do not apply to substrates that bleed oil, plasticizers or solvent.
Do not apply to damp or wet substrates.
Lower temperature and humidity will extend tack free and cure rates.
Allow treated wood to age six months before application.
Brass and copper may be discolored. Test apply prior to application.
Test sensitive substrates for compatibility before use.
Due to the very low tensile strength of asphalt and possibility that asphalt may fail cohesively within itself, Sikasil 728 SL is not recommended for asphalt to asphalt joints.