Discover unparalleled durability with Yakoo's Fiberglass Body Filler YK999 Quart, engineered with short fiber strands to prevent cracking and deliver high strength. This top-tier filler offers excellent adhesion to most metal base materials, making it especially suitable for car body welding and joints. Effectively address shrinkage problems often encountered in welding with our easy-to-use formula: simply degrease, sand dry with P80-120, mix Filler: Hardener at 100:1.5-3 by weight, and enjoy a pot life of 3-5 minutes at 25℃ with a sanding time of just 15 minutes. As your trusted partner for premium auto body and paint supplies, Yakoo ensures quality and performance in every product.