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🛡️ Seal the deal on comfort and style with Frost King!
The Frost King Thermwell T3750 is a 37-inch gray vinyl T-shaped storm door bottom insert designed to replace worn weather seals. It provides a durable, precise fit that blocks drafts, dust, rain, and insects, enhancing home comfort and energy efficiency. Ideal for aluminum storm doors, this easy-to-install weatherstrip combines functionality with a sleek look, making it a must-have upgrade for millennial homeowners seeking smart, stylish weather protection.



| ASIN | B001735PNG |
| Best Sellers Rank | #108,056 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #3,239 in Door Hardware & Locks |
| Brand Name | Frost King |
| Color | Gray |
| Customer Reviews | 3.8 3.8 out of 5 stars (608) |
| Global Trade Identification Number | 00077578025223 |
| Included Components | pocket-door-hardware |
| Item Dimensions L x W | 4.85"L x 5.9"W |
| Item Thickness | 0.5 Inches |
| Item Type Name | 37", Gray, Storm Door Bottom |
| Item Weight | 0.01 Ounces |
| Manufacturer | Thermwell Products Co., Inc |
| Manufacturer Contact Information | 1-800-526-5265 |
| Material Type | solid |
| Recommended Uses For Product | Sealing and protecting the bottom of storm doors, preventing drafts, dust, rain and insects from entering the house |
| UPC | 077578025223 |
| Unit Count | 2.0 Count |
S**.
Great service! Product slightly shorter than factory package says it is.
LTG Home and Hardware LLC sent me exactly what I ordered, and it got here sooner than expected. Great service! However, the product itself, a Frost-King weatherstrip to insert at the bottom of a storm/screen door, was slightly shorter than advertised (about 36 instead of 37 inches). I have seen this same issue come up in other reviews of this Frost King product, but luckily, it was only about an inch shorter, and my screen door is a couple of inches narrower, so it worked out okay for me.
J**.
The narrow part was a bit too wide for the groove in the bottom of my door
i was able to trim about a millimeter off one side of theta part with a sharp pair of scissors to make it fit. I needed to use a silicone lubricant a pair of pliers to pull it into the groove. The hard pulling required did not seem to damage the strip in any way.
A**M
It really insulates well
This made a HUGE difference in my hallway, which has no heat vents and can feel like you're standing outdoors in the winter. Use a little Pam or silicone to help it slide into place. I used three for the channels in my storm door. For less than ten bucks, you can't beat it.
J**A
Not What I Was Looking For
I needed to replace a door sweep fin and this looked like it would fit my door. I figured that since it was listed as "free returns" as long as I didn't open it was a no-brainer to give it a try. Once received I realized it was not a good fit without opening the package. When I tried to return it in new, unopened condition seller refused to honor free return policy.
A**H
It is OK. Not too clear what doors it fits though
It is OK. Nothing more than that. This is a pretty stiff sweep, I took a gamble that it really did fit my Andersen storm door as It seemed to by the description & sizing. Unfortunately the T piece was too wide for the slot in my door so I had to carefully trip it to the right width with a razor blade. The 3 stars are NOT for this reason. They are simply because it is an adequate product, not great, not bad, middle of the road, that's all. It may well be too long for your door, that is to be expected as it is universal, so do what I did & trim to length. No issues there. It is working OK so far, As my old sweep lasted several years I hope this one will so I can't yet comment on longevity! I get no compensation for my reviews, I just like to offer real world experience after I have used the product for a while & not just after I open the box.
S**O
An easy fix
I used this product to fix the bottom seals on my mother's storm doors. The old seals were torn, and strips of the old seals were hanging down and interfering with the doors closing properly. She wanted to replace the doors, but for 20 bucks I fixed the doors and restored the clean appearance of the existing doors. It's an easy fix; just remove the adjustment channel, slide out the old seals, slide in the new, and trim to length. Replace the adjustment channel and you're done.
A**I
Could not determine size; trim to fit = hours of labor.
So based on reviews that said the top of the T was 3/8” I purchased this item. It turns out the top of the t is closer to 5/8” wide and is thicker than the one I needed. I had trim and shave the damn thing to make it fit. I used a bench grinder to take some off the top and a box cutter to trim the sides. It is soft and I was able to jam it into the slot on my door, but could you just list the accurate dimensions for us?
S**Y
works well
works well and fits great
M**I
Fits good, does as advertised
R**N
Went to put this product on my door and it basically fell apart… would not fit, broke in a few places!! Ended up throwing it away… they want me to pay for shipping it back!! I’ll go to Home Depot to get what I need! Not worth the money!
D**N
It’s good but not fit for the my storm door.
M**R
Works well, but trimming to fit took a bit of extra effort.
D**F
Perfect fit, excellent quality, received quickly
Trustpilot
3 weeks ago
3 weeks ago