Frost King B2 Mortite Fingertip Caulking Cord, 1/8" x 90 ft, Grey

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

I bought this rope caulk to seal the inside of a large window from temperature and bugs. It was easy to apply and works well. No tools are needed. Caulk applied from a caulking gun might look nicer, but I did not need that. If you need something that is less noticeable, clear caulk from a gun would be better. I would not use this for any critical outside sealing jobs because it might come off over time if exposed to the elements directly. Overall, this is a good product for sealing anything as long as looks are not extremely important.

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.

This rope caulk is excellent for people with hand issues that cannot squeeze a caulking gun. Whether you need a small amount or are working with a large gap, this works in any situation and is especially pliable if you are able to warm it up by rolling it in your hands first. In a trim situation I add a small amount at a time and press it in with a paint stick, then smooth it out. It sticks to many types of surfaces (brick, mortar, wood, metal, drywall, vinyl, plastic etc.) and stays where you put it. This does not need to be masked or cleaned like traditional caulk would, and can be painted over. I have used this indoors and outside for stopping drafts, soundproofing, and sealing off gaps from insects. I highly recommend Frost King Mortite rope caulk.

This works as well as any butyl tape, but I wish there was more of it. The package says 90 feet. I would say the roll is about 12 feet long. You get 90 feet by separating the eight strands. A single strand really isn't enough for any job. I found myself splitting the tape in half with four strands to a half which gave me about 24 feet of tape. It was enough to get the job done, but I'll be more attentive next time.

This product is fantastic. It is so versatile and holds up forever. If you don't use it all, wrap in plastic to keep out air and it will still be great a year later. The cords make it easy to remove the exact length and width you need for whatever you are insulating.

Easy to use / apply, goes a great job sealing up very old windows at mother-in-laws house. Basically strips of round clay you peel off and press into the cracks along the edges of the windows. Does good at stopping drafts, and in spring, comes off easy. I've used the chalk like rubber sealing for around windows, but thats always very hard to do (hard to squeeze it out of tube), and not as easy to get off in the spring. So I'm sticking with this easy to use clay-like solution.