---
product_id: 3564255
title: "B2 Mortite Fingertip Caulking Cord, 1/8\" x 90 ft, Grey"
brand: "frost king"
price: "₨510"
currency: SCR
in_stock: true
reviews_count: 13
category: "Frost King"
url: https://www.desertcart.sc/products/3564255-b2-mortite-fingertip-caulking-cord-1-8-x-90-ft
store_origin: SC
region: Seychelles
---

# Fingertip application, no tools Weatherproof & waterproof seal 1/8" x 90 ft versatile strip B2 Mortite Fingertip Caulking Cord, 1/8" x 90 ft, Grey

**Brand:** frost king
**Price:** ₨510
**Availability:** ✅ In Stock

## Summary

> 🤩 Seal Smart, Live Comfortable — The Ultimate DIY Weatherproofing Hack!

## Quick Answers

- **What is this?** B2 Mortite Fingertip Caulking Cord, 1/8" x 90 ft, Grey by frost king
- **How much does it cost?** ₨510 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sc](https://www.desertcart.sc/products/3564255-b2-mortite-fingertip-caulking-cord-1-8-x-90-ft)

## Best For

- frost king enthusiasts

## Why This Product

- Trusted frost king brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Flexible & Removable:** Won't harden—maintains a tight seal yet removes cleanly without damage.
- • **All-Season Durability:** Stays pliable and effective from freezing winters to warm springs.
- • **Multi-Purpose Mastery:** Ideal for windows, vents, insect barriers, soundproofing, and crack filling.
- • **Effortless Fingertip Seal:** No caulking gun needed—just press and seal for instant weatherproofing.
- • **Universal Surface Compatibility:** Works seamlessly on wood, metal, glass, masonry, plastic, and concrete.

## Overview

Frost King B2 Mortite is a 1/8" x 90 ft grey caulking cord designed for effortless fingertip application. It forms a durable, weatherproof seal on both porous and non-porous surfaces without the need for tools. Flexible and removable, it adapts to various materials including wood, metal, glass, and masonry, making it the go-to solution for sealing windows, vents, and cracks year-round.

## Description

Product Description Mortite is the original name in Do-It-Yourself fingertip caulking, and it's still famous for its quality and versatility. Mortite Weatherstrip and Caulking Cord will seal windows effectively. It's also widely used as a gasketing material, sound deadener, insect barrier, crack filler, and all-around "plugger-upper. It's available in classic grey or in woodtone to blend with brown or wood finishes. From the Manufacturer Mortite Caulking Cord is the original name in the do-it-yourself caulking. It is still famous for quality and versatility and will seal windows but will work great for gasketing material, sound deadener, insect barrier, crack filler and all around plugger-upper.

Review: Good window caulking - This is the standard in clay window caulking. It comes in a roll and has several strips that you can choose the size you need from. It is better to apply when it isn’t freezing cold out, but you can when cold too. Just have to push harder. I have plants on my windowsill and this helps a lot when I caulk the windows. Also, easy to remove in the Spring, and no worries about apt management fuss on this either.
Review: Works where other Stuff Fails - The product description does no say how wide this roll is. There used to be wide and narrow versions of the product. I am taking a chance a buying it anyway because the picture shows the right number of calk strands. The wooden covers of my crawlspace vents do not fit air tight, and the furnace air ducts are in the crawl, uninsulated. Between the crumbly cinderblock foundation, and the square of plywood used to cover the vents, there is an irregular gap that must be filled airtight before each winter. Tape won't stick, regular calk can't fill the big holes and regular calk will not stick to dirty or crumbling surfaces. If you use any other calk and it falls off in mid winter, you cannot re calk if the temp goes below zero. Mortite is awesome. You can use the whole width, or separate the strands to make a narrower strip. It is like pliable clay, clean and easy to work with. It used to be reasonably biodegradable, made of chalks. It doesn't bond permanently, but sticks great against brick, cinder, rotted wood the problem surfaces. Here is how I seal my vents. Remove plywood vent cover. Cut a square of closed cell foam to fit the opening. and place it into the opening on top of the screening. (I cut up the foarm mat sold to use under sleeping bags). Cut four lengths of the widest mortite (about an inch wide) and lay the strips about the opening so the center line of each strip is on the edge of the vent openting all around. The opening will be 'framed'. Press the putty lightly against the foundation, just enough to hold it it place. Carefully press the plywood vent cover back into the vent opening. The vent cover will press into the mortite lining the opening and make a great seal. Then, and this is the most important part, break off four more strips of mortite to cover the four sides of the rectangle opening. Lay each strip so half the strip overlaps the house foundation, and half overlaps the vent cover. Now you have a mortite sandwich with the edges of the vent cover. Press the Mortite tightly against the foundation of the house to make it sticke real good. Lasts all winter airtight, and my vent covers are rotted and wet. In spring, the putty comes right off

## Features

- Indoor outdoor mortite
- For use with wood, plastic, metal, mansonry, glass and concrete
- Forms weatherproof seal on porous and non-porous surfaces
- No caulking gun needed... just press in place with your fingertips
- Won't harden... so it selas tight, yet can be easily removed

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000LNODSQ |
| Brand | Frost King |
| Color | Gray |
| Date First Available | August 3, 2009 |
| Full Cure Time | 24 Hours |
| Global Trade Identification Number | 00038092810924 |
| Is Discontinued By Manufacturer | No |
| Item Form | Strip |
| Item Weight | 1.19 pounds |
| Item model number | B2 |
| Liquid Volume | 54 Centiliters |
| Manufacturer | Frost King |
| Material | Rubber |
| Number of Items | 1 |
| Product Dimensions | 5.5 x 5.75 x 1.25 inches |
| Surface Recommendation | Window |
| UPC | 038092810924 |
| Unit Count | 1.0 Count |
| Water Resistance Level | Waterproof |

## Product Details

- **Brand:** Frost King
- **Color:** Gray
- **Full Cure Time:** 24 Hours
- **Item Weight:** 19 Ounces
- **Liquid Volume:** 54 Centiliters

## Images

![B2 Mortite Fingertip Caulking Cord, 1/8" x 90 ft, Grey - Image 1](https://m.media-amazon.com/images/I/81+X3ZmpBKL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: Is it easy to remove when the weather warms up?**
A: This is the reason I love this stuff!  You can apply it in the winter and pull it off in the spring.  It is so cheap, but I have also saved thicker strips for re-use by storing in a baggy and then using them in the out of the way places like a cellar window where I am not so concerned about the look of it being patched together.  You can't beat this stuff for the price!

**Q: Can this be applied outside in cold temps (20F or below)?**
A: Yes, you can apply it if the temperatures are 20F or below.   Please note that you need to divide the sections so that you have only the width that you need.   Then you need to push it INTO THE SPACE OR INTO THE CRACK for it to stay in place.

**Q: 5.5 x 5.8 x 1.2 inches? These dimentions don't even come close to the photo or a 45 foot roll. anybody have a clue?**
A: Roll has 8 single strings of caulk which are rolled over and over again but are attached like licorice strings. It’s a lot and I have a 90 ft roll. The strings are a little thin an 1/8 of an inch in diameter x 90 ft long but they work.

**Q: I have sliding windows, and patio door.  Will the grey work good to seal the drafts on them?**
A: Absolutely!  I wasn't sure how good it was going to be so I ended up ordering more. I bought the wood - colored one as well to put on places where wood meets the sill, as I could feel air seeping in.  I can't say how great this stuff is.  I've got it on all my windows.  It's very easy if you need to adjust it and taking it off is a breeze. You can peel it off in whayever is needed....thin, medium or thick pieces.  It's inexpensive as well!  I needed to write this review for you because I believe when you're going to buy a product...it's nice to hear from someone who has used it if it's good or not. Again, great great product and price!!

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good window caulking
*by H***A on December 29, 2025*

This is the standard in clay window caulking. It comes in a roll and has several strips that you can choose the size you need from. It is better to apply when it isn’t freezing cold out, but you can when cold too. Just have to push harder. I have plants on my windowsill and this helps a lot when I caulk the windows. Also, easy to remove in the Spring, and no worries about apt management fuss on this either.

### ⭐⭐⭐⭐⭐ Works where other Stuff Fails
*by E***X on September 30, 2009*

The product description does no say how wide this roll is. There used to be wide and narrow versions of the product. I am taking a chance a buying it anyway because the picture shows the right number of calk strands. The wooden covers of my crawlspace vents do not fit air tight, and the furnace air ducts are in the crawl, uninsulated. Between the crumbly cinderblock foundation, and the square of plywood used to cover the vents, there is an irregular gap that must be filled airtight before each winter. Tape won't stick, regular calk can't fill the big holes and regular calk will not stick to dirty or crumbling surfaces. If you use any other calk and it falls off in mid winter, you cannot re calk if the temp goes below zero. Mortite is awesome. You can use the whole width, or separate the strands to make a narrower strip. It is like pliable clay, clean and easy to work with. It used to be reasonably biodegradable, made of chalks. It doesn't bond permanently, but sticks great against brick, cinder, rotted wood the problem surfaces. Here is how I seal my vents. Remove plywood vent cover. Cut a square of closed cell foam to fit the opening. and place it into the opening on top of the screening. (I cut up the foarm mat sold to use under sleeping bags). Cut four lengths of the widest mortite (about an inch wide) and lay the strips about the opening so the center line of each strip is on the edge of the vent openting all around. The opening will be 'framed'. Press the putty lightly against the foundation, just enough to hold it it place. Carefully press the plywood vent cover back into the vent opening. The vent cover will press into the mortite lining the opening and make a great seal. Then, and this is the most important part, break off four more strips of mortite to cover the four sides of the rectangle opening. Lay each strip so half the strip overlaps the house foundation, and half overlaps the vent cover. Now you have a mortite sandwich with the edges of the vent cover. Press the Mortite tightly against the foundation of the house to make it sticke real good. Lasts all winter airtight, and my vent covers are rotted and wet. In spring, the putty comes right off

### ⭐⭐⭐⭐ Works well, but…
*by B***N on December 21, 2024*

This is a good way to seal up SMALL gaps and keep the cold/hot air out or from escaping. This size is good for gaps of approx 1/8” It allows you to press some into the gap and have a bit to press down on either side of gap for a good hold. This also allows for easier removal when time comes. One important tip is to let the roll warm up before you try to peel the cord. When it is warm it is easy to handle and unroll the cord. If it is cool or cold it is harder to handle and spills apart easily. Not a deal breaker, i just find it much easier to handle while it is warm.

## Frequently Bought Together

- Frost King B2 Mortite Fingertip Caulking Cord, 1/8" x 90 ft, Grey
- XFasten Transparent Window Weather Sealing Tape, 2-Inch x 30 Yards (50.8mm x 27.43m), Clear Window Draft Isolation Sealing Film Tape, No Residue
- Transparent Window Weather Sealing Tape 2 Inch x 33 FT Weather Stripping Residue-Free Clear Window Insulation Tape for Doors Windows and Shower Glass Gaps

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*Product available on Desertcart Seychelles*
*Store origin: SC*
*Last updated: 2026-02-23*