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Stormwater rehabilitation
Strong-Seal · Pipe and culvert lining
Storm Seal® Spray-Applied Lining
A fiber-reinforced liner for corrugated metal, concrete and masonry culverts, storm drains and catch basins. It goes on from the inside, with no digging.
culverts, 24″ diameter and larger
24″+
psi compressive strength at 28 days
9,000+
shrinkage at 28 days (ASTM C596)
0%
A new culvert inside the old one
No trench, no excavation. Storm Seal® is sprayed by hand or spun cast inside the culvert. It stops inflow and infiltration, restores structural integrity and leaves a smooth surface for water to flow over.
2 ways
Hand spray or spin cast
Spray it by hand, or spin cast it with Strong-Seal® spincasting equipment.
1″
Minimum liner
Built up in passes to at least 1″ total thickness.
STORM-SEAL 60 lb bag · 40 per pallet
9,000+ psi
Compressive strength
Over 1,200 psi flexural and 800 psi tensile at 28 days.
300 cycles
Freeze/thaw tested
Passes ASTM C666 with no damage.
Six steps to a lined culvert
1
Divert
Dam, divert or bypass the flow.
2
Clean
Jet with high pressure water. Remove loose debris and loose or protruding brick, mortar, concrete or metal.
3
Stop leaks
Stop active leaks with Strong-Plug®. Fill large voids and joints with a rapid-setting patch.
4
Rebuild the invert
Where the invert is scoured or washed out, rebuild it with Grout 12,000 first. Wait at least 1 hour before lining.
5
Line
Hand spray up to 1″ per pass from the crown, or spin cast no more than ½″ per pass. 1″ minimum total. Wait 2 hours between overhead passes.
6
Cure
Keep it damp for 72 hours if humidity is under 70%, or use an ASTM C309 curing compound. Shade the structure in hot, dry weather.
Back in service: storm runoff after 4 to 6 hours. Stream flow after 8 to 10 hours.
Before you line
A culvert liner needs a sound, even surface. Stop active leaks, then rebuild a scoured invert so Storm Seal® goes on at an even thickness all the way around.
First, stop the leaks
Strong-Plug®
Sets in under a minute and hardens on contact with water. Once it sets, you can line right over it.
See Strong-Plug ›
Then rebuild the invert
Grout 12,000
Self-consolidating grout that rebuilds a scoured culvert invert to its original shape before lining.
See Grout 12,000 ›
Meet Fernco Infrastructure
An overview of our manhole rehabilitation and trenchless pipe repair solutions.
Technical data
Specifications
| Part number | STORM-SEAL |
|---|---|
| Packaging | 60 lb bag, 40 bags per pallet |
| Compressive strength (ASTM C109) | Over 9,000 psi at 28 days |
| Flexural strength (ASTM C293) | Over 1,200 psi at 28 days |
| Tensile strength (ASTM C496) | Over 800 psi at 28 days |
| Bond strength (ASTM C882) | Over 2,000 psi at 28 days |
| Freeze/thaw (ASTM C666) | Pass, no damage, 300 cycles |
| Drying shrinkage (ASTM C596) | 0% at 28 days, 90% RH |
| Wet unit weight (ASTM C138) | 134 ± 5 lb/ft³ |
|---|---|
| Yield per bag | 0.58 ft³, or 14.0 ft² at ½″ thick |
| Made with | Type I/II portland cement, pozzolans, masonry sand and alkaline-resistant fiberglass |
| Thickness | 1″ minimum total. Hand spray up to 1″ per pass; spin cast up to ½″ per pass |
| Water | 1.2 to 1.5 gallons per bag |
| Equipment | SprayMate® 35C, SprayMate® 35D, MiniMate II, or Strong-Seal® spincasting equipment |
| Typical structures | Corrugated metal, concrete and masonry culverts 24″ and larger, storm drains and catch basins |
FAQ
Common questions
What size culverts?
It’s formulated for stormwater applications and culverts 24″ in diameter or larger.
Hand spray or spin cast?
Either. Hand spray up to 1″ per pass, starting at the crown. To spin cast, center the spincaster and pull it back at a rate that places no more than ½″ per pass. Either way, the total must be at least 1″.
What if the invert is washed out?
Rebuild it with Grout 12,000 first, so the liner goes on evenly. Wait at least 1 hour before applying Storm Seal®.
When can flow go back in?
Storm runoff after 4 to 6 hours. Stream flow after 8 to 10 hours.
What weather can I apply it in?
Don’t apply below 40°F, on frozen surfaces, or if the surface could freeze within 24 hours. Keep the material under 90°F and the mix water under 80°F. Chill with ice if you need to.
How is it tested on the job?
Cast four 2″ cube samples each day, or for every pallet used, whichever comes first. Package, label and return them to the manufacturer for compressive strength testing per ASTM C109, following the owner’s or manufacturer’s directions.
For distributors
Interested in carrying Fernco Infrastructure?
Fernco Infrastructure covers manhole, structure and pipe rehab with three product lines. Add them to your line card to serve municipal and contractor customers.
Documents
The Strong-Seal Storm Seal sell sheet with full specifications and application steps, plus the Fernco Infrastructure, Plumbing and WaterWorks catalogs.
Got questions?
Lining a culvert or writing a spec? Our infrastructure team can help. Reach out, or find your Fernco rep.