Loctite PL Concrete Non-Sag Polyurethane Sealant (10 oz) Review (2026)
By Nate Sawyer, Editor · Updated July 2026
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- Concrete cracks
- Masonry joints
- Vertical cracks
A single-component non-sag polyurethane sealant for vertical and overhead concrete and masonry cracks up to about 3/8 inch, a counterpart to self-leveling products. It stays put where self-leveling would run, needs no primer, flexes with +/-25% movement, and is paintable. Trade-offs: it must be hand-tooled, and full cure takes roughly a week.
Pros
- Non-sag body stays put on vertical and overhead cracks where self-leveling sealant would run out
- No primer needed on concrete, brick, or masonry and it bonds to many other substrates
- Flexes with +/- 25% joint movement and is paintable to match surrounding surfaces
Cons
- Must be tooled by hand to a smooth finish, unlike a self-leveling product
- Rated to about 3/8 in joint width without backer rod, so it is not for very wide cracks
- Full cure takes roughly a week, so it is not a quick same-day repair
Specifications
| Type | Single-component non-sag polyurethane sealant |
|---|---|
| Expansion | N/A (gunnable, tooled) |
| Cure | Skins ~24 hr, functional ~3 days, full cure ~1 week |
| Paintable | Yes, paintable |
| Use | Vertical/overhead concrete & masonry cracks and joints, up to ~3/8 in wide |
| Movement | Accommodates +/- 25% joint movement |
Frequently Asked Questions
- Non-sag or self-levelling sealant, which do I need?
- Non-sag is for vertical and overhead work: walls, steps, foundation faces and anywhere a self-levelling sealant would simply run out of the joint. For flat horizontal cracks in a driveway or slab, a self-levelling product is easier because gravity does the tooling for you.
- How wide a crack can it fill?
- Up to about 3/8 inch without backer rod. Wider joints need backer rod installed first, and very wide cracks fall outside what this sealant is designed to handle.
- Can it be painted?
- Yes, it is paintable, which is a practical reason to choose it over silicone on concrete and masonry you intend to finish.
- How long does it take to cure?
- It skins in roughly 24 hours, becomes functional in about 3 days and reaches full cure in around a week. It is not a same-day repair, so plan accordingly if the area needs to take load or face weather.
- Does it need primer on concrete?
- No primer is required on concrete, brick or masonry, and it bonds to many other substrates as well. It also accommodates about plus or minus 25% joint movement.