CRL Dual Hytrel Cup Caulking & Urethane Heaters/Coolers *For best results

*For best results

prime first with a high quality oil-based primer

formed-in-place silicone rubber building joint and glazing sealant

and other common building substrates

Use to keep caulking cartridges

CRL Dual Hytrel Cup Caulking & Urethane Heaters/Coolers *For best resultsReplaces Worn Leathers in Bulk Load Guns The most commonly worn out component part in bulk caulking guns are the leather cups. CRL Dual Hytrel Cups replace the leather cups found in most 2" (51 mm) diameter barrels. Product images shown are of the actual product or a close representation. Colors can vary depending on your computer's video card and on how your monitor's color is adjusted.