Crack Sealing on Trails To Parent Forum April 15, 2021 at 4:56 pm #2561 Geoff HubbardParticipant What companies have people used to crack seal and overlay ashphalt trails in Iowa? I need to get some other bids besides DENCO Highway, who did work for us 5-10 years ago. Any other options would be great. You must be logged in to reply to this topic.