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🛠️ Seal it, fix it, flaunt it — the ultimate paste for flawless finishes!
Flex Paste 1-Pound Jar is a premium, rubberized sealant designed to fill large cracks and holes while providing a flexible, waterproof barrier. Compatible with a wide range of materials, it is fully paintable, UV resistant, and submersible, making it perfect for diverse indoor and outdoor repair projects. Made in the USA and ASTM C-920 certified, it ensures professional-grade durability and protection.












| ASIN | B084TDS8S5 |
| Amazon Bestseller | #225,659 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #67 in Lard & Rendered Animal Fat #136 in Adhesive Caulk |
| Brand Name | Flex Paste |
| Color | Black |
| Compatible Material | DIY |
| Customer Reviews | 3.7 3.7 out of 5 stars (868) |
| Item Dimensions | 10.8 x 10.8 x 6.4 cm |
| Item Form | ジャー,ペースト |
| Manufacturer | Flex Seal |
| Material Type | Rubber |
| Model | FLEX SEAL - PFSBLKR16 - BLACK |
| Number of Items | 1 |
| Part Number | PFSBLKR16 |
| Style Name | 1 lb Black |
| Supported Standards | ASTM C-920 |
| Surface Recommendation | Windows, Doors |
| UPC | 850010226804 |
| Unit Count | 16.0 Ounce |
| Water Resistance Level | Waterproof |
G**S
Excelente producto, hace todo lo que promete. Solo lo puedes usar una vez, lo deje muy bien tapado como venía en el instructivo y se seco, pero cumple perfectamente su función.
G**N
Very handy gap filler provides great flexibility.
J**N
Good
D**A
Easy to apply.
B**N
I want to rate this product lower because this is the second one I’ve bought that had a hard 2/3” top so 10-15% of it is trash. This product is also very hard to work with. This will not spread smooth and is very messy. This product will only patch a small area. I used the entire tub for this small patch over. However, I am rating this product a 4 star because there is not another product that I know of like it. This is the second time patching my rooftop tent due to the tent getting a crack in it. This product went on and cured in the very moist fog. It then rained and still cured. This product lasted through a very cold winter through heavy snow and some rain. This product took abuse from heavy 4x4ing and flexing. It wasn’t until it was well over 100f and with some flexing this product split. I bought this second tub to patch the crack.
Trustpilot
1 month ago
4 days ago