Questions? Email us at store@projectweekenddiy.com
Sikaflex Self-Leveling Sealant is a one-part, pourable polyurethane sealant for horizontal expansion and control joints in concrete. Squeeze it into the joint and it flows level on its own, then cures to a permanently elastic seal that moves with the slab. Sika lists driveways, garages, sidewalks, balconies, terraces and warehouses among its uses. This is the gray 10.1 oz cartridge.
Ship time: Orders usually ship in 2 to 4 business days, then standard delivery takes 3 to 7 business days, so plan on about 1 to 2 weeks. $5.99 shipping, free at $35+ (lower 48 + DC). Shipping policy
Buy just one, no case minimum. $5.99 shipping, free at $35+, no code needed (lower 48 + DC). Flammable liquids such as this polyurethane sealant can't be returned. If it arrives damaged, defective or wrong, email Store@projectweekenddiy.com with photos and we will make it right. See our shipping policy and refund policy.
| Type | One-part self-leveling polyurethane sealant; ASTM C-920 Type S, Grade P, Class 25 |
|---|---|
| Color / size | Gray, 10.1 fl oz (299 ml) cartridge |
| Joint size | 1/4 to 1/2 in deep, 1/4 to 1-1/2 in wide; 2:1 width to depth. Joints that carry traffic need at least 1/2 in depth |
| Yield per cartridge | Width x depth: about 24 linear ft at 1/4 x 1/4 in, 12 ft at 1/2 x 1/4 in, 6 ft at 1/2 x 1/2 in |
| Application temperature | 40 to 100 F air and surface; bring the cartridge to 65 to 75 F before use |
| Tack free / final cure | 1 to 2 hours / 3 to 5 days |
| Service temperature | -40 to 170 F |
| Shelf life | 12 months unopened; use an opened cartridge the same day |
| Manufacturer part # | 515304 (UPC 033886093835) |
Made for horizontal joints; not for sloped surfaces. Do not use against asphalt or other bituminous materials, near curing silicone, or when moisture vapor is coming up through the slab (it can bubble). To avoid bubbles in hot weather, apply when air and slab temperatures are falling and below 100 F. Uncured sealant cleans up with an approved solvent; cured sealant has to be cut out. Facts from the Sika product data sheet (November 2018, version 01.04).
Do I need backer rod? Yes. Sika says to always use closed-cell backer rod or bond breaker tape on horizontal joints, both to support the sealant and to keep it from sticking to the bottom of the joint.
How long before I can drive on it? It is tack free in 1 to 2 hours and fully cured in 3 to 5 days; cure time varies with temperature and humidity.
Can I use it on a sloped driveway or a wall? No. It is a pourable, self-leveling sealant and Sika marks it not for sloped surfaces.
Compare pourable joint sealants in self-leveling concrete sealant, see gun-grade options in caulk and sealants, protect the slab with concrete and masonry sealers, or shop the full Sika line.
Need a blade for the job? Allway 13-Point 9mm Snap-Off Utility Knife (Single).
Free standard shipping on orders $35+ to the lower 48 states and DC.
30-day returns on unused, unopened items. Contact us within 30 days of delivery to start a return. Opened paint, aerosols, flammables, special orders and sale items can't be returned. Read the full refund policy.
Use this product page for the exact item, then check the Weekend Project Carts for prep, applicators, patch, cleanup, and finishing supplies. If you are still choosing a method, start with the Project Guides before adding everything to cart.
