https://www.repairmywindowsanddoors.co.uk/hatfield-guttering-and-downpipes-near-me/ Repairing Leaks From Cast Iron Downpipe Joints Leaks in the cast iron joints of downpipes could be a source of concern. They can lead to water damage and encourage the growth of mildew and mould. Fortunately they are repairable. But first you'll need to cleanse the pipes of any rust or paint using a wire brush. When the pipes are clean then you'll need to evaluate the extent of the damage. Caulking Although caulking isn't a long-lasting fix, it's often enough to protect against further damage and keep rainwater flowing. Most hardware and home improvement shops have mortar caulking. It's used to seal gas in stone, bricks and metal, as well as for repairing foundation cracks and fissures in basements as well as sealing leaks around doors and windows, and it can also be used to seal cast iron pipe joints. If you are using caulking, make sure to get rid of any paint or rust from the area prior applying the new sealant. You can make use of a scraper or wire brush to accomplish this, but be careful not to scratch or cut the pipe itself. Wear gloves when working with caulking since the chemical compound can irritate the skin. To prepare the area, employ a wire scraper or wire brush to clean any rust and debris from the pipe joint. Masking tape should be placed on either on either side of the joint to ensure clear lines to be used when caulking. The end of the caulk tube should be cut at 45-degree angles. Then fill the caulk gun with a small amount of the compound. Apply it to the joints and gaps that you want to repair. When using a caulking tool, you must be consistent with the speed and pressure you use to apply an even, smooth layer of the compound to the joints or gaps. It is recommended to wait at least six hours after applying the caulking before using the downpipe. This will allow the caulking to completely dry and provide a a strong, lasting seal. Although most people are able to co