Contact cement failure I finished 2 sections and used DAP Weldwood gel formula contact cement and it worked perfectly. Insufficient dry time. Bubbles in the veneer. Dec 20, 2008 ยท Designing Kitchens and Bathrooms - Contact Cement failure - I am building some cabinets using MDF for the tops covered with Formica. Discover how surface preparation, drying time, and environmental factors like temperature and humidity impact adhesion. ) 3. Check with your adhesive supplier to find the dry time that is right for your Contact adhesive can be finicky when not used correctly. 1. While contact cement is known for its strength and versatility, its performance can be compromised in prolonged wet environments. ) 2. Check application method and equipment. Insufficient adhesive coverage. 100% coverage on both the back of veneer and face of substrate. Edge lifting. (Both should be covered. Most problems with contact adhesive failure are caused by: 1) not allowing the adhesive to dry fully before assembly 2) waiting too long before assembly 3) applying too thick a coating of adhesive 4) not applying enough adhesive. GUIDE TO CONTACT ADHESIVE PROBLEM SOLVING FOR SHEET VENEER IF THE FOLLOWING OCCURS WHAT TO LOOK FOR POSSIBLE SOLUTIONS 1. (Spraying is better than rolling; rolling is better than brushing. . 2. The following roubleshooting guide, however, is for those of you applying veneer with contact cement. Contact cement is an adhesive, which, when coated on two mating surfaces and allowed to dry, provides an instant permanent bond when brought into firm contact. The vulnerability of contact cement to moisture and its limitations in bonding certain materials make it less suitable for projects exposed to water or high humidity. Apply more adhesive to veneer and substrate. Struggling with contact cement that just won't stick? This article explores common reasons for bonding failures and provides essential tips for success.