By the time you see the stain, the grease is already in the board. This goes down first.
✔ Grease lands on a sealed face and hoses off · ✔ A dropped coal stops in the mat, not in your deck · ✔ A quarter-inch thick — roughly 6× the usual mat
Start The Season On It“I'd been through two of the cheap ones. The first went slimy by the end of the summer and I binned it, the second curled so bad I kept catching my foot on the corner. So I ordered this one half expecting to send it back. It came rolled instead of folded, it's about six times the thickness of the last one, and grease just sits on top of it until I hose it. It's been under the smoker since May and I haven't thought about it once.”
THE WHOLE CASE
Four reasons, and that's the lot
No mechanism arms race. One mat, built around the three things that let it stay down permanently.
TriShield™ Grill Mat - Ultimate Patio & Deck Protection
TriShield™ Grill Mat - Ultimate Patio & Deck Protection
FROM THE DECK
THE HONEST COMPARISON
What each option actually stops
The 30-Day Deck Guarantee
Your deck stays clean, or it's free. Put it down and cook on it for thirty days — grease, drips, whatever your cooker does. If your deck is not as clean as the day you put the mat down, or you are unhappy with it for any other reason, one email gets you a full refund and you do not have to ship the mat back. Fewer than 2% of buyers have ever used it.
ANY LAST QUESTIONS?
The things people ask before they order
What size is it, and what does it fit?
60" × 30" — 12.5 square feet. It fits with margin under a 22" kettle, a 3–4 burner cart-style gas grill, and most pellet grills. A 28"–36" griddle throws grease in front of and behind the cooker beyond a single mat's footprint; two laid end to end is the right answer there.
Will it actually stop grease getting to the deck?
Yes, and that is the job it was built around. The face is sealed and closed-cell — no weave, no felt, nothing for oil to sink into — so grease beads on the surface, pools inside a raised perimeter lip rather than running off the edge, and hoses off. The reason this matters is that grease which reaches a deck does not sit on top of the board: porous concrete, pavers, unsealed wood and a composite cap all draw it down within hours, which is why cleaning it later so rarely works.
What actually happens when a coal lands on it?
The face melts locally and leaves a permanent mark; the woven fiberglass scrim beneath arrests the burn. A charcoal ember burns at 700–1,200°F. The TriShield fire-resistant fiberglass core is rated to 1,250°F. To be clear about what it is not: it catches what falls, it is not a barrier against sustained or radiant heat, it does not change the fire rating of your deck, and no mat makes a cooker safe to leave running unattended.
How do I clean it?
Hose it. The face is sealed and non-porous, so grease beads rather than soaking in. Most people do it a handful of times a season. Nothing to launder, nothing to wring out.
What if I don't like it? How do refunds work?
Email us within 30 days of delivery with your order number and we refund you in full — that is the 30-Day Deck Guarantee: your deck stays clean, or it's free. You do not need to send the mat back. Refunds go to the original payment method and usually show up within 5–7 business days. Shipping: free on two or more, with tracking on every order.
Leave it down. That's the whole idea.
★ 4.8 · 1,472 reviews · 14,206 decks covered — grease beads on a sealed face and hoses off · a dropped coal stops in the mat, not in your deck · 30-Day Deck Guarantee
Start the season on it
Early Fall Sale — 50% off, free shipping on two or more.
Get The TriShield — 50% OffGet the deck-season emails
Cook notes, test results as they land, and a heads-up before the next run sells out. Nothing else.