SEM
SEM Dual-Mix 39777 High-Build Self Leveling 2-Component Seam Sealer, 7 oz Cartridge, Liquid, Gray
No reviews yet
Authorized dealer
Ships today
30-day returns
Overview
Built for the job.
Dual-Mix™ High-build self leveling seam sealer is a two-component, controlled flow epoxy ideal for use on roof seams, drip rails and trunk seams.
Why Pros Choose SEM High-Build Self Leveling 2-Component
- Dual-Mix™ forever warranty
- OEM recommended
- Direct to metal on non-flexing roof skins
- Paintable in 15 min
- Will not shrink, harden or crack
- Permanently flexible
How to Use
For use on bare metal, OEM finish, epoxy primer and DTM urethane primer
Compatibility
Compatible paint systems: Epoxy.
Specifications
| Part No. | 39777 |
|---|---|
| Product Line | SEM |
| MFR Model | 39777 |
| Standard/Approvals | GHS07 | GHS08 | OSHA HCS Hazard | OEM Approved | California PROP65 Warning: Cancer and Reproductive Harm |
| Includes | High Build Self Leveling |
| Application | For use on bare metal, OEM finish, epoxy primer and DTM urethane primer |
| Manufacturer | SEM |
| UPC | 646786397776 |
| Brand | Dual-Mix™ |
| Maximum Sale Quantity | 6 |
| Maximum Sale Day | 7 |
| Applicable Materials | Bare Metal, Epoxy Primer, DTM Urethane Primer |
| Composition | 30 to 40% Bisphenola(chloro)oxirane Polymer, >=7 to <10% Cellulose, 1.5 to 5% Epoxy Resin, 1.5 to 5% Modified Diglycidal Ether, 1.5 to <5% 2,4,6-tris(dimethylaminomethyl)phenol, 1 to 1.5% 7 Fumed Silica , >=0.1 to <1% Castor Oil Glycidal Ether, >=0.1 to <1% 1,3-bis(2,3 -epoxypropoxy)-2,2-dimethylpropane , >=0.1-<1% [3-(2,3-epoxypropoxy)propyl]trimethoxysilane |
| Application Time | 10 min at 70 deg F |
| Paintable (Y/N) | Yes |
| Odor/Scent | Characteristic |
| Color | Gray |
| Setting Time | 15 min at 70 deg F |
| Flash Point | 249 deg C |
| Container Size (oz) | 7 |
| Container Type | Cartridge |
| Form | Liquid |
| Temperature Rating (deg F) | 70 |
| Type | High-Build Self Leveling 2-Component |
| Curing Time | 1 hr at 70 deg F |
About SEM
SEM Products specializes in paint adhesion systems, flexible coatings, and plastic repair — the go-to choice for interior and trim refinishing.
Frequently Asked Questions
What is the cure or dry time for SEM?
The curing time for SEM is 1 hr at 70 deg F. Drying and curing times may vary with temperature, humidity, and film thickness — always consult the Technical Data Sheet (TDS) for exact cycle conditions.
What size does SEM come in?
This listing ships SEM in a 7 container. Check the autofxmart catalog for other sizes and bulk pricing.
How fast does autofxmart ship SEM?
Most in-stock orders for SEM ship the same or next business day from our US warehouse. Expedited options are available at checkout. Freight-class items may require an additional 1–2 days for carrier pickup.
Is this SEM product genuine?
Yes. autofxmart is an authorized distributor of SEM products. Every unit is factory-fresh, sealed, and backed by the manufacturer's standard warranty. If you have a concern, contact support@autofxmart.com and we will make it right.
What is the manufacturer part number (MPN) for SEM?
The MPN for SEM is 39777. Use this number when cross-referencing against TDS, SDS, or legacy supplier catalogs.
Documents & Safety
Why Buy from autofxmart
- Authorized distributor — authentic, factory-fresh stock.
- Fast US shipping — most orders ship within 1 business day.
- 30-day returns — buy with confidence.
- Pro-shop pricing — bulk discounts available on request.
- Expert support — questions? Email us at support@autofxmart.com.
Cure & dry schedule
Timing at 77°F
Skin
10 min
Handle
1 hr
Paintable
30 min
Full cure
24 hr
How to apply
Steps
1Clean both surfaces to bare, dry substrate.
2Load the cartridge and fit the mixing nozzle.
3Apply an even bead (or clamp) where needed.
4Tool or smooth the joint before it skins over.
5Allow to cure fully before stressing or painting.
Specifications
Full data
Frequently asked
Good to know
The curing time for SEM is 1 hr at 70 deg F. Drying and curing times may vary with temperature, humidity, and film thickness — always consult the Technical Data Sheet (TDS) for exact cycle conditions.
This listing ships SEM in a 7 container. Check the autofxmart catalog for other sizes and bulk pricing.
Most in-stock orders for SEM ship the same or next business day from our US warehouse. Expedited options are available at checkout. Freight-class items may require an additional 1–2 days for carrier pickup.
Yes. autofxmart is an authorized distributor of SEM products. Every unit is factory-fresh, sealed, and backed by the manufacturer's standard warranty. If you have a concern, contact support@autofxmart.com and we will make it right.
The MPN for SEM is 39777. Use this number when cross-referencing against TDS, SDS, or legacy supplier catalogs.
What Our Customers Say
Thanks! Your review was submitted and will appear after moderation.
No reviews yet — be the first to review this product.
