Flex Caulk, Waterproof & Weatherproof Hybrid Polymer Sealant, Strong, Paintable, Indoor, Outdoor, Bath, Shower, Sink, Window,
4.3 | 4,031 ratings
Price: 19.87
Last update: 02-02-2026
About this item
- So easy to use.
- No caulk gun needed.
- Adjustable Trigger Flow Nozzle.
- Advanced hybrid polymer formulation.
- Snap & Save cap eliminates waste.
- Seals out water, air, and moisture.
- Adheres to virtually any surface, wet or dry.
Product information
Item details
| Brand Name | Flex Seal |
|---|---|
| Manufacturer | Swift Response, LLC |
| UPC | 810129870787 |
| Customer Reviews | 4.34.3 out of 5 stars(3,725) 4.3 out of 5 stars |
| Best Sellers Rank |
|
| ASIN | B0D2FKV95Q |
| Included Components | Flex Caulk, Clear, 6.6 oz, 1-Pack |
| Item Height | 1.75 inches |
| Unit Count | 6.6 Fluid Ounces |
Additional details
| Material Type | Hybrid Polymer |
|---|
Feedback
Flex Caulk, Waterproof & Weatherproof Hybrid Polymer Sealant, Strong, Paintable, Indoor, Outdoor, Bath, Shower, Sink, Window, Baseboards, Door, RV, Roof, Wood, Auto & Marine, Clear, 6.6 oz, 1-Pack
Share:https://www.amazon.com/dp/B0D2FKV95Q
Found a lower price? Let us know. Although we can't match every price reported, we'll use your feedback to ensure that our prices remain competitive.
Where did you see a lower price?
Fields with an asterisk*are required
Pleasesign into provide feedback.
User guide
| Full Cure Time | 24 Hours |
|---|---|
| Initial Hardening Time | 10 minutes Minutes |
| Surface Recommendation | Tile, Pipe, Counter Top, Window, Door, Sink, Tub, Walls, Gutter |
Features & Specs
| Water Resistance Level | Waterproof |
|---|
Style
| Color | Clear |
|---|---|
| Item Form | Liquid |
Measurements
| Item Weight | 6.6 Ounces |
|---|---|
| Liquid Volume | 6.6 Fluid Ounces |
Top reviews from the United States
- JTAbsolutely incredible product 5 Stars!I am no handyman and definitely not good at DIY stuff around the House, but this practical and excellent product gave me the confidence to seal up my Window in my Basement and it worked flawlessly!
I can’t say enough good things about this product!
It’s easy to use and does exactly as the product claims and there was virtually no mess! - T&K Amazon CustomersWell worth it!Caulking isn't new to anyone, but for the homeowner or renter who occasionally needs a bit of caulk and wants it ready to use at a moment’s notice, this is the product to reach for. Unlike traditional tubes that require squeezing and can be messy or inconsistent, this applicator features a push-button mechanism with adjustable flow control—making precise application effortless and clean. The design is intuitive and ideal for small touch-ups or quick fixes around the house. While it may come at a slightly higher price point, the convenience, reliability, and ease of use make it a worthwhile investment for anyone who values having the right tool on hand when needed.
- Barbara WheelerFlex calkIs great product easy to use
- HusseinVery usefulThis caulk is hard and great. It does get cold and freeze a bit in the nozzle, so you have to poke it to get that white stuff out. But when you're using it, it works great. I did, however, need to watch their video to figure out how to use it. But it was kind of complicated at first. It does get sticky and dry quickly. No smell. Very useful to seal little holes in windows
- Robin L. WrightFantasticThis stuff is fantastic. My second time ordering. Easy to use and works as advertised.
- Mel-katWorks great!Bought this for the first time for caulking around the windows and doors. This is the easiest caulking tube to use. You can manage the thickness of the caulk on how fast/slow you apply. It has a tube closure or shut off capability to keep it from drying out. It's easy to get it started for reuse too. I would definitely buy again.
- TryitonceMessy and hard to useconfused about this product. it was Consumer Reports rated their top pick. but I found it hard to use, messy, hard to remove from fingers, and applicator opening was round and hard to get a 45 degree angle as directed. suggest a rethink of applicator design.
- P. ShipseyEasy, peasy, a little squeezyBefore purchasing, I read reviews which said this product was difficult to figure out and to use. I had a very different experience. Pull off the red cap with pliers and follow directions on the package or tube.
I reinforced some caulking on my camper while standing on a tall ladder. I could not have accomplished this while using a caulking gun, but with this product it was easy, peasy.
I will update this post if I experience negative effects, especially if it stays tacky. It v was cold when I applied it (35°) but nothing on the packaging called for certain temps.
So far an easy to apply product.