Siroflex HY6001 HYBRI-SIL Advanced Hybrid Adhesive Sealant, White Fills gaps to 1" wide Works in all weather conditions providing a weather tight seal Meets or exceeds the requirements of ASTM 920 Type S, Grade NS, Class 25, and TTS-00230C Low Odor; VOC compliant; Contains no isocyanates or solvents Permanently flexible; Will not crack, peel or shrink