OK640 OK640 Okon

Rust-Oleum Okon Penetrating Silane Siloxane Sealer S-40

Product Code: OK640

Availability:Out of stock

Rs. 42,560.00 Rs. 38,304.00 13,023.00

OKON S-40 is a water-based, oliogomeric siloxane/silane, ready to use, deep penetrating water-repellent. It is a colorless, odorless, non-staining, non-yellowing and nonfilm forming penetrant used to protect concrete or masonry surfaces without altering the appearance or texture of the treated surface. OKON S-40 is breathable, nonflammable and complies with VOC regulations.

It is designed for vertical surfaces, light weight concrete, normal weight concrete block, mortar joints, porous brick, precast, pre-stressed, poured-in-place, exposed aggregate, and air entrained concrete and horizontal slabs, and above grade concrete wearing surfaces.

NOTE: It is not allowed to send this item through air mode. Surface mode is enabled for the same. Thus, shipping will be done through surface.

Features of Penetrating Silane Siloxane Sealer S-40

  • Ready-to-use waterbase, breathable
  • VOC Compliant (all jurisdictions)
  • Colorless, odorless, non-yellowing
  • Non-glossy, will not alter texture or appearance of treated surface
  • Resists high alkalinity
  • Resists chloride salts

How to Apply Okon Penetrating Silane Siloxane Sealer S-40

Surface Preparation

OKON S-40 can be applied to porous surfaces that are unsealed, clean (free of dirt, waxes and oils), dry and sound. New concrete must be cured for 21 days prior to coating. Cracks and joints must be sealed prior to application. S-40 must be able to penetrate into the surface. Test the openness of the substrate by sprinkling with water. If the surface turns dark with the water S-40 can be applied. Clean exterior surfaces by pressure washing to remove dust, mildew, sand or other foreign matter. Vacuum and damp-mop interior surfaces. Remove efflorescence with sulfamic or dilute muriatic acid. If acid is used, it must be completely neutralized before applying S-40. Rinse the surface thoroughly after chemical cleaning. Use a degreaser to remove oil or grease stains.


OKON S-40 is ready-to-use and should not be diluted. Agitate before use. Avoid application in windy weather. In hot weather, where possible, lightly spray surface with water to cool the surface to prevent flash drying. S-40 is best applied by low-pressure airless spray but can be applied by garden-type sprayer or small areas can be applied by brush or roller. For airless spray, reduce pressure to 500 psi and use a large tip 0.035 – 0.050” tip. Hold spray tip 12-18 inches from the surface, start at the bottom of the wall and work up with an overlapping horizontal spray pattern to ensure run down of 6 – 8 inches. Take special care to saturate mortar joints. Do not stop or interrupt the application in the middle of the wall. Stop application only at expansion joints, walls or breaks defined with masking. Uneven application may result in blotchy appearance. Water repellency properties wll develop 24 hours to 5 days after application.

Properties of Okon Penetrating Silane Siloxane Sealer S-40

Manufacturer Rust-Oleum
Resin Type Silane / Siloxane
Color Colorless
Solvents Water
Volatile Organic Compounds 200 g/l (1.66 lbs./gal.)
Application Parameters 45°F to 90°F (7°C to 32°C) <85% Relative Humidity
Dry Times at 70-80°
(21-27°C) and 50% RH
Wet-on-wet, if required to Re-Coat
8 Hours to Foot Traffic
24 hours to Vehicle Traffic
Protect From Rain 24 hours
Protect From Dew 12 hours
Shelf Life 12 months unopened in protected storage.
Flash Point >200ºF (93ºC)
Safety Information For additional information, see MSDS
Technical Data Sheet Click here